Weather Maker
Explore how warm air holds more moisture, how low pressure brings clouds and rain, and how temperature decides whether precipitation is rain or snow.
Before you try
What if it were freezing cold and very humid? Rain, snow or fog?
Try it out
Interactive activity
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What happened?
Move a control to see what changes and why.
Weather here comes from four dials in one place. Real forecasts track the whole atmosphere moving over days, which is why they are never certain.
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Try these ideas
- Make a thunderstorm: what combination do you need?
- Keep humidity high and slide the temperature below 0 °C.
- Find the settings for a perfect clear day.
Why it works
Weather is the state of the air right now. Four things matter most: temperature, humidity (how much water vapour the air holds), air pressure (high pressure usually means clear skies, low pressure means clouds and storms) and wind.
Set the four dials and the scene changes: sunshine, fluffy clouds, drizzle, a thunderstorm, snow or fog. The simulator uses simple meteorology rules, the same reasoning forecasters start with.
Check your understanding
Question 1 of 3
Which usually brings clear, calm weather?
It is very humid, pressure is low and the temperature is −3 °C. What falls?
Warm air compared with cold air can hold…
Explain it in your own words
What changed? Why did it happen? Where might you notice this in everyday life?
For parents & teachers
- Check today’s forecast together. What do the pressure and humidity say?
- Ask: why do storms often happen on hot, sticky afternoons?
- Make a simple wind vane and record the wind direction for a week.