Weather Experiments Kids Can Do at Home (2026)

12 Weather Experiments

1. Cloud in a Jar

Ages 4+ Fill a jar with warm water (1/3 full). Light a match, blow it out, and drop the smoky match in. Quickly put the lid on and squeeze a cold wet cloth on top. A cloud forms inside! The smoke particles act as condensation nuclei — just like real clouds.

2. DIY Barometer

Ages 7+ Stretch a balloon over a jar opening. Tape a straw to the balloon as a pointer. Mark the straw's position daily. When air pressure drops (storm coming), the balloon sinks and the straw points down.

3. Rain Cycle in a Bag

Ages 3+ Draw the water cycle on a ziplock bag. Add a little water. Tape it to a sunny window. Watch evaporation, condensation, and "rain" inside the bag over days.

4. Tornado in a Bottle

Ages 5+ Fill a bottle 3/4 with water. Add a drop of dish soap and glitter. Spin the bottle in a circle. A vortex forms — same physics as real tornadoes.

5. Wind Vane

Ages 6+ Cut an arrow and tail from cardboard. Attach to a straw with a pin through an eraser on a pencil. It spins to show wind direction. Track daily patterns.

6. Rainbow Maker

Ages 4+ Fill a glass with water. Hold it near a window so sunlight passes through. A rainbow appears on the wall. The water acts as a prism, splitting white light into colors.

7. Thermometer from a Bottle

Ages 8+ Fill a bottle with colored water and water mixture. Insert a clear straw sealed with clay. As temperature rises, the liquid expands up the straw. Calibrate against a real thermometer.

8. Rain Gauge

Ages 5+ Cut the top off a plastic bottle. Invert the top as a funnel. Mark measurements on the side. Leave outside and record daily rainfall. Compare to weather reports.

9. Static Lightning

Ages 6+ Rub a balloon on hair. Bring it near a small piece of aluminum foil. A tiny spark jumps — this is the same principle as lightning, just much smaller.

10. Dew Point Demo

Ages 8+ Fill a metal can with ice water. Watch the outside fog up. That's dew forming — the can cooled the air below its dew point. Measure the temperature when dew first appears.

11. Wind Speed Anemometer

Ages 9+ Attach 4 paper cups to a cross of straws with a pin through the center. One cup gets a mark. Count rotations per minute to estimate wind speed.

12. Greenhouse Effect Model

Ages 8+ Two thermometers in sunlight. Cover one with a clear jar. The covered one gets warmer — the glass traps heat like greenhouse gases trap heat in the atmosphere.

Weather Journal Template

Encourage kids to keep a daily weather log: