K-ESS2-1: Weather Patterns – Observing and Describing Local Weather

Performance Expectation

K-ESS2-1. Use and share observations of local weather conditions to describe patterns over time.

Clarification Statement: Examples of qualitative observations could include descriptions of the weather (such as sunny, cloudy, rainy, and warm); examples of quantitative observations could include numbers of sunny, windy, and rainy days in a month. Examples of patterns could include that it is usually cooler in the morning than in the afternoon and the number of sunny days versus cloudy days in different months.

Assessment Boundary: Assessment of quantitative observations limited to whole numbers. Assessment does not include projecting weather patterns beyond the current month.

General Overview

Weather is the state of the atmosphere at a particular place and time – a dynamic, observable phenomenon that kindergartners experience every single day. K-ESS2-1 asks young students to do something scientists genuinely do: observe their environment systematically, record those observations, and look for patterns. This is not simply “talking about the weather” – it is the first authentic scientific investigation most children will ever conduct.

At the kindergarten level, weather is an ideal entry point into science for several reasons. First, it is immediately accessible – students do not need lab equipment or expert knowledge to engage with it meaningfully. Second, it changes daily, providing a natural rhythm for repeated observation. Third, it has obvious connections to students’ daily lives (What should I wear today? Will we have recess outside?). Fourth, it builds foundational data literacy that students will use throughout their academic careers.

The disciplinary core ideas behind this standard come from ESS2.D (Weather and Climate), which distinguishes weather (short-term atmospheric conditions) from climate (long-term patterns). At the kindergarten level, students are not yet expected to understand climate formally – that comes in grades 3–5 – but they are planting the conceptual seeds by observing and tracking patterns over weeks and months.

The science and engineering practice foregrounded here is Analyzing and Interpreting Data, combined with Obtaining, Evaluating, and Communicating Information. Students observe, they record, they share, and they look for patterns – a complete mini-cycle of scientific reasoning appropriate for five-year-olds.

The crosscutting concept is Patterns: noticing that nature is not random but follows recurring regularities that allow us to make predictions. When a child says “It’s been raining a lot this week – maybe it will rain tomorrow too,” they are applying this concept intuitively. The teacher’s job is to make that thinking visible and explicit.

Scope and Sequence

What Comes Before (Pre-K)

Most students enter kindergarten with informal, language-based awareness of weather. They use words like “sunny,” “rainy,” “cold,” and “hot” in conversation. They may have personal associations (“I like snow because we get to make snowmen”) but have little systematic understanding of weather as a pattern. Pre-K programs may introduce weather through calendar time, but this is often performative rather than investigative.

What Happens at This Grade (Kindergarten)

This is the first time students conduct systematic, repeated observations and look for data patterns. Key learning moves include:

1. Developing a shared class vocabulary for weather conditions.
2. Observing and recording weather daily using consistent tools (charts, pictographs, tally marks).
3. Comparing weather observations across different days, weeks, and months.
4. Making simple pattern-based predictions (“It has been sunny most days this week – will tomorrow be sunny?”) and
5. Communicating observations to classmates and family.

What Comes After (Grades 1–2)

In Grade 1, students investigate the relationship between sunlight and the warming of Earth’s surface (K-PS3, which connects directly here). In Grades 2–5, students revisit weather and climate with increasing sophistication – examining data from multiple sources, understanding regional climate patterns, and ultimately connecting human activity to changes in Earth’s climate systems. The observational habits developed in kindergarten are the foundation for all of this later work.

Middle and High School Connections

By middle school, students analyze data from weather maps, understand atmospheric pressure and frontal systems, and begin modeling the water cycle quantitatively. High school students study climate change using real datasets, build mathematical models of Earth’s energy balance, and evaluate the societal implications of weather and climate hazards. The pattern-recognition habit formed in kindergarten is the bedrock of all of this increasingly sophisticated scientific thinking.

What Students Must Understand

Core Conceptual Understandings

• Weather is a local, observable phenomenon. Students must grasp that weather refers to what is happening in the sky and air around them – right now, in this place – not in a distant city or abstract location.
• Weather has multiple measurable dimensions. Temperature (warm/cool/cold), precipitation (rain, snow, hail, none), cloud cover (clear, partly cloudy, overcast), and wind (calm, breezy, windy) are all separate, simultaneously observable weather conditions. Students learn that a complete weather description addresses multiple dimensions, not just one.
• Weather changes over time, but patterns exist. While weather can be unpredictable from day to day, across longer periods (weeks, months) patterns emerge. Some months have more rainy days than others; mornings are usually cooler than afternoons; certain times of year tend to be warmer.
• Patterns allow simple predictions. Because weather follows patterns, we can use past observations to make reasonable – though not certain – predictions about future conditions. This is the conceptual heart of weather forecasting.
• Data must be collected consistently to be useful. Students begin to understand why scientists observe at the same time each day, use the same vocabulary, and record carefully – consistency is what makes pattern-finding possible.

Key Vocabulary Students Should Acquire

Weather, observe, observation, record, data, pattern, temperature, precipitation, cloud cover, wind, sunny, cloudy, partly cloudy, rainy, snowy, windy, calm, warm, cool, cold, hot, predict, prediction, tally, pictograph, chart.

Skills Students Must Develop

• Make consistent, accurate observations of sky conditions using their senses.
• Record observations using pictures, symbols, tally marks, and simple numbers.
• Organize data in a simple chart or pictograph.
• Identify patterns in a collected dataset (e.g., “We had more cloudy days than sunny days in October”).
• Communicate observations and patterns verbally and in writing/drawing to classmates.
• Make a simple prediction based on observed patterns and explain the reasoning.

Lesson Ideas and Activities

Activity 1: The Class Weather Journal (Ongoing – Full Year)

Overview: Every morning, the class pauses to observe the weather together. One student is designated “Weather Scientist” for the day. They look out the window, describe what they see and feel (if safe to go outside briefly), and record the weather on a class chart. Over time, this builds a rich dataset for pattern analysis.

Materials: Large classroom weather chart (laminated, reusable); weather symbol cards (sun, cloud, rain, snow, wind, etc.); student weather journals (blank booklets); crayons/markers.

Procedure:

1. Each morning, the Weather Scientist goes to the window or steps outside with the teacher briefly.
2. The class discusses: What do you see in the sky? What does the air feel like? Is it windy?
3. The Weather Scientist places the appropriate symbols on the class chart and records in their journal.
4. At the end of each week, count the symbols together and discuss patterns. At the end of each month, make a simple pictograph.

Extension: At the end of each month, compare to previous months. In spring, compare to fall data. Ask: “What do you notice? What is different? What is the same?”

NGSS Practices: Analyzing and Interpreting Data; Obtaining, Evaluating, and Communicating Information.

Activity 2: Weather Dress-Up Drama

Overview: Students are given a weather scenario card (e.g., “It is a cold, rainy day”) and must choose appropriate clothing from a dress-up bin. They then explain their choices. This connects weather observation to real-world decision-making and reinforces vocabulary.

Materials: A collection of clothing items (raincoat, umbrella, sunglasses, mittens, boots, t-shirt, hat, scarf); weather scenario picture cards.

Discussion Questions: How did you know which clothes to pick? What clues did you use? What would happen if you wore these clothes in the wrong weather?

Activity 3: Monthly Weather Bar Graph

Overview: At the end of each month, students work together to turn their tally data into a simple bar graph on a large poster. They count how many sunny, rainy, cloudy, and snowy days they recorded.

Key Questions: Which weather type happened the most? Which happened the least? Did anything surprise you? How does this month compare to last month?

Math Connection: Counting, comparing quantities, understanding “more than” and “less than,” reading simple bar graphs – all connected to Common Core Math for Kindergarten.

Activity 4: Weather Scientists Go Outside

Overview: Once a week (weather permitting), take students outside with clipboards and simple observation sheets. They practice making observations with all appropriate senses: What do I see? What do I feel on my skin? What do I hear?

Safety Note: If weather involves lightning, high winds, extreme cold/heat, or other hazards, do this activity from a covered porch, doorway, or window observation instead.

Focus Questions for Students: “Point to where in the sky the sun is today.” “Describe the clouds using your own words.” “Hold out your hand – what do you feel?”

Activity 5: Weather Pattern Detectives (Assessment Activity)

Overview: Provide students with a simple pictograph showing one month of weather data (use the class’s own data or a prepared set). Ask them to identify patterns and make a prediction.

Sentence Frames for ELL and struggling readers: “I notice that ___.” “A pattern I see is ___.” “I predict that ___ because ___.”

Activity 6: Weather Story Books

Overview: Students create a simple 4-page weather book: one page each for a sunny day, rainy day, cloudy day, and windy day. They draw what they would see, feel, and do on each type of day. This builds vocabulary and consolidates observational knowledge in a creative format.

ELA Connection: Students write or dictate simple sentences describing each weather condition, connecting to CCSS ELA Kindergarten writing standards.

Common Student Misconceptions

Misconception 1: “Weather and temperature are the same thing.”

What students think: Many students conflate “weather” exclusively with temperature – “The weather is cold today” – without recognizing that precipitation, wind, and cloud cover are also dimensions of weather.

How to address it: Consistently use multi-dimensional weather descriptions in class. Ask students to always describe at least two different aspects of the weather each morning. Create a weather observation chart that has separate columns for temperature, sky conditions, precipitation, and wind.

Misconception 2: “Weather is the same everywhere.”

What students think: Young children often assume the weather they experience at school is what everyone in the world experiences simultaneously – that if it is snowing at their school, it is snowing everywhere.

How to address it: Use simple maps showing weather in different parts of the country. Ask family members in other places to share what their weather is like today. This is excellent for building geographic awareness alongside weather understanding.

Misconception 3: “Clouds cause cold weather.”

What students think: Because cloudy days are often cooler and rainy days are wet and cool, students develop an incorrect causal belief that clouds make weather cold.

How to address it: Keep a weather journal across all seasons. Students will observe warm, overcast days in summer that disprove this simple rule. Ask: “Have you ever been outside on a warm day when it was cloudy? What was the weather like?”

Misconception 4: “We can always predict tomorrow’s weather from today’s.”

What students think: Once students understand that weather follows patterns, some over-apply this by assuming simple day-to-day prediction is always accurate.

How to address it: Build in prediction-and-check activities where students sometimes predict incorrectly. Discuss: “Why was our prediction wrong? Does that mean patterns are useless, or just that they aren’t perfect?” This is a developmentally appropriate introduction to probabilistic thinking.

Misconception 5: “Rain comes from clouds that hold water like buckets.”

What students think: Students often believe clouds literally contain liquid water that “spills” as rain when clouds get too full.

How to address it: While the water cycle is not formally taught until later grades, teachers can acknowledge this partially correct intuition while noting that “clouds are more like fog than buckets.” Avoid going into detailed water cycle mechanics – that comes in grades 2 and beyond.

Misconception 6: “Seasons and weather are the same thing.”

What students think: Students often use “winter” to mean “cold” or “rainy” and “summer” to mean “hot,” conflating seasonal patterns with day-to-day weather variation.

How to address it: Point out exceptions – warm days in winter, cool days in summer. Emphasize that “season” refers to a longer time period with general tendencies, while “weather” is what happens on any specific day.

Assessment Questions

All assessment at the kindergarten level should be conducted through observation of student performance and conversation, pictorial responses, or simple written/dictated answers. The questions below can be used for class discussion, individual conferencing, or embedded in simple picture-based assessments.

Knowledge and Recall

1. Look out the window. What is the weather like today? How would you describe it to someone who couldn’t see outside?
2. What are some different types of weather? Name as many as you can.
3. What tools or words do scientists use to describe weather?

Observation and Data Recording

4. Here is our weather chart from last month. How many sunny days did we have? How many rainy days? Which type of weather happened the most?
5. (Show a simple pictograph) What do you notice about this weather data? Describe a pattern you see.
6. Why do you think scientists write down their weather observations every day instead of just trying to remember them?

Pattern Recognition and Prediction

7. Look at our weather chart from the past two weeks. What patterns do you notice? What do you think the weather might be like next week? Why?
8. Our data shows it has been rainy for 4 days in a row. What might you predict about tomorrow’s weather? Is your prediction definitely correct? Why or why not?
9. We have been observing weather since September. What is something different you notice about the weather now compared to when we started?

Real-World Application

10. Your family is planning a picnic for next Saturday. What would you want to know about the weather to plan for your picnic? How could you find out?
11. Why do you think weather forecasters study weather patterns? How does knowing about weather patterns help people?
12. Draw a picture of a day when the weather was very different from what it looked like the day before. What changed? What stayed the same?

Higher-Order and Transfer

13. A student from another school says “Weather is always random – you can never tell what it will be like.” Do you agree or disagree? Use evidence from our weather journal to explain your thinking.
14. If you were a scientist who wanted to find out whether your town gets more rain in the fall or the spring, what would you do? What data would you need?

Connections to Other NGSS Standards

K-PS3-1 / K-PS3-2: The sun’s energy heats Earth’s surface and affects air temperature – directly relevant to daily temperature observations students make in this standard.

K-ESS3-2: Severe weather creates natural hazards; students who have been observing weather patterns all year are better prepared to understand why severe weather preparedness matters.

2-ESS2-1 and 4-ESS2-1: Weather connects to erosion and Earth surface processes – water and wind from weather events shape the landscape over time.

3-ESS2-1 and 3-ESS2-2: Grade 3 students revisit weather to analyze climate patterns and compare climates across regions – the observational foundation built in kindergarten is essential here.

Cross-Curricular Connections

Mathematics

Counting weather occurrences; comparing quantities (“more than,” “fewer than,” “equal to”); creating and reading pictographs and bar graphs; identifying patterns in number sequences – all kindergarten Common Core Math standards deeply embedded in this science activity.

English Language Arts

Informational text reading about weather; describing observations in spoken and written language; using precise vocabulary; communicating findings to an audience – connects to CCSS ELA Kindergarten speaking, listening, and writing standards.

Social Studies

Weather varies by location – students can explore how weather differs across the United States and around the world, connecting to geography and cultural studies. How do different communities prepare for different kinds of weather?

Art

Illustrating different types of weather; creating weather journals with detailed observational drawings; using color and visual elements to represent temperature and mood.

Physical Education / Health

How does weather affect what we wear, how we play, and how we stay safe? Weather-appropriate clothing and outdoor safety habits connect science learning to everyday health decisions.

Differentiation Strategies

For Students Who Need Additional Support

• Provide visual vocabulary cards with pictures paired to weather words.
• Use a simplified weather chart with fewer categories (just sunny/cloudy/rainy/snowy).
• Allow students to draw rather than write their observations.
• Pair with a peer buddy during outdoor observation activities.
• Provide sentence frames: “Today the weather is ___. I can tell because I see/feel ___.”

For English Language Learners

• Pre-teach weather vocabulary using images, gestures, and real examples.
• Allow responses in home language paired with target English vocabulary.
• Use multilingual weather vocabulary charts.
• Leverage students’ background knowledge of weather in their home country/region as a discussion starting point.

For Advanced Learners

• Introduce simple temperature measurement tools (thermometers) and have students record actual numbers alongside qualitative descriptors.
• Challenge students to compare the class data to published weather data for your city (available from weather.gov).
• Ask students to create their own weather prediction system and evaluate its accuracy over time.
• Introduce the concept of weather forecasting as a career – what does a meteorologist do?

Teacher Background Knowledge

Weather vs. Climate: Weather is the short-term (hours, days, weeks) condition of the atmosphere at a specific place. Climate is the long-term (decades, centuries) average pattern of weather in a region. At kindergarten, students observe weather; the concept of climate emerges formally in later grades.

The Four Main Weather Variables Students Will Observe: (1) Temperature – how warm or cool the air feels (qualitative at this level). (2) Precipitation – any form of water falling from the sky: rain, snow, sleet, hail. (3) Cloud cover – the fraction of the sky covered by clouds: clear, partly cloudy, mostly cloudy, overcast. (4) Wind – movement of air; qualitative descriptions (calm, breezy, windy) are appropriate at this level.

Why Weather Follows Patterns: Weather is driven by the unequal heating of Earth’s surface by the sun, combined with Earth’s rotation, the presence of water, and the composition of the atmosphere. Because these driving forces follow regular cycles (especially Earth’s orbit and rotation), weather patterns recur on daily, seasonal, and annual timescales. Students don’t need to understand the mechanisms yet – just to observe that the patterns exist.

Severe Weather: Severe weather (thunderstorms, tornadoes, hurricanes, blizzards) arises when weather conditions become extreme. While kindergartners are not expected to understand the meteorology of severe weather, they should know it exists and connects to weather preparedness (see K-ESS3-2).

Recommended Resources for Teachers

• NOAA Weather for Kids (weather.gov) – official US weather data, radar, and educational resources.
• UCAR Center for Science Education – free weather and climate lesson plans aligned to NGSS.
• NSTA Learning Center – professional development modules on teaching weather in K-2.
• Amplify Science Kindergarten – a full NGSS-aligned curriculum unit on weather patterns.
• Mystery Science “Weather and Sky” Unit – engaging video-based lessons for K-2 weather.
• “Feel the Wind” by Arthur Dorros – accessible picture book on wind for kindergartners.
• “The Cloud Book” by Tomie dePaola – introduces cloud types and weather connections.