Maths in weather

Quick answer

Maths is all around us in weather – from reading temperatures and counting rainfall to making graphs and finding averages. You can use maths to understand weather patterns, plan your day, and even predict the future!

Learning outcome

By the end of this page, you will be able to use maths to understand weather information, including temperature, rainfall, and averages, and you will be able to make simple weather graphs to show what you've learned.

• You can read and write temperatures using positive and negative numbers.
• You can count and add rainfall amounts to find totals.
• You can make and read simple bar graphs showing weather data.
• You can find the average temperature over several days.

Why this matters

Weather affects everything we do – from what we wear to what we eat, and even how we plan our days. Understanding weather data helps us make smart choices. For example, if you know the average temperature, you can choose the right clothes. If you know how much rain is forecast, you can plan a picnic or a football match. Maths helps us make sense of the weather and use it to help us live better lives.

How it works

Let’s explore how we can use maths with weather. First, we look at temperature. Then we count rainfall. Next, we use averages to find what the weather is usually like. Finally, we make graphs to show our findings.

1. Temperature: Temperatures can be above zero (like 10°C) or below zero (like -5°C). We use positive and negative numbers to show this.
2. Rainfall: Rainfall is measured in millimetres (mm). We can add these amounts to find the total for a week or a month.
3. Averages: If we know the temperature for five days, we can add them up and divide by five to find the average.
4. Graphs: We can draw bar graphs to show how much rain fell each day or how the temperature changed.

Examples you can see

Let’s imagine you are tracking the weather for a week. Here are some real examples of how maths helps:

Temperature examples

Let’s say the temperature in your town was:

Notice how the temperature can go below zero – that’s cold! We use negative numbers to show this.

Rainfall examples

Let’s say it rained this week:

To find the total rainfall for the week, we add up all the numbers:

2 + 0 + 5 + 3 + 1 = 11 mm

Average temperature

Let’s find the average temperature from the table above:

8 + 5 + (-2) + 1 + 3 = 15

Then we divide by 5 (the number of days):

15 ÷ 5 = 3°C

So, the average temperature for the week was 3°C.

Try it as a mini adventure

Adventure: Weather Tracker Challenge

You are a young weather scientist! Your mission is to track the weather for a week and then make a report.

1. Each day, write down the temperature and how much rain fell (in mm).
2. Add up the total rainfall for the week.
3. Find the average temperature for the week.
4. Draw a bar graph showing how much rain fell each day.
5. Write a short report: “This week, it rained 11mm and the average temperature was 3°C.”

Great job! You’ve used maths to help understand the weather!

Common mistakes

• Mistake: Forgetting to include negative numbers when temperatures go below zero.
• Why it happens: Some children think temperatures can’t go below zero.
• Fix: Remind them that negative numbers are just a way to show cold weather, like -5°C.

• Mistake: Adding rainfall amounts incorrectly.
• Why it happens: Confusing addition with subtraction or misreading the numbers.
• Fix: Double-check the numbers and use a calculator or counting on fingers to help.

• Mistake: Forgetting to divide when finding the average.
• Why it happens: Thinking that adding the numbers is enough.
• Fix: Always remember: to find an average, add the numbers and divide by how many there are.

Parent and carer guide

Helping your child with weather maths is easy and fun! Here are a few tips:

• Use a real weather app or newspaper to look at temperatures and rainfall for your area.
• Ask your child to add up the rainfall for a week or find the average temperature.
• Draw a simple bar graph together to show the data.
• Encourage them to use negative numbers when temperatures are below zero.
• Don’t worry if they make a mistake – it’s part of learning!

Remember, the goal is not to get everything right, but to explore and enjoy maths in the real world!

Practice questions

1. What is the total rainfall if it rained 3mm, 0mm, 2mm, 5mm, and 1mm in a week?
2. Find the average temperature if the temperatures were 6°C, 4°C, 2°C, 0°C, and -1°C.
3. Which day had the coldest temperature: -3°C, 2°C, 0°C, -5°C, or 1°C?
4. If the temperature was -4°C and it rose by 6°C, what is the new temperature?
5. How many millimetres of rain fell in total if it rained 1mm, 2mm, 3mm, 4mm, and 5mm?

Answers:

1. 3 + 0 + 2 + 5 + 1 = 11 mm
2. 6 + 4 + 2 + 0 + (-1) = 11, 11 ÷ 5 = 2.2°C
3. -5°C
4. -4 + 6 = 2°C
5. 1 + 2 + 3 + 4 + 5 = 15 mm

FAQ

What is the average temperature?

The average temperature is the sum of all temperatures divided by the number of days.

Why do we use negative numbers for temperatures?

Negative numbers help us show temperatures below zero. For example, -5°C means it’s 5 degrees below freezing.

How can I make a weather graph?

You can draw a bar graph with days on the bottom and rainfall or temperature on the side. Each bar shows how much rain or how hot/cold it was.

Can I use maths to predict the weather?

Yes! Scientists use maths to make predictions based on patterns in weather data. You can start by tracking your own weather and seeing what happens over time.

How does rainfall affect daily life?

Rainfall helps plants grow, but too much rain can cause floods. Knowing how much rain falls helps us plan for the future, like deciding when to plant seeds or if it’s safe to go outside.