Clouds, Dew Point & Relative Humidity Lab – Weather, Lesson Plans, Worksheets

Bring atmospheric science to life with this hands-on Relative Humidity, Dew Point, and Cloud Formation Lab. Students step into the role of meteorologists as they use sling psychrometers to measure wet-bulb and dry-bulb temperatures, calculate humidity and dew point, and connect their findings to real-world cloud formation and weather patterns.

Why Teachers Love This Lab:

✔ Real Data, Real Science – Students collect and analyze authentic atmospheric measurements
✔ Strong Real-World Connections – Helps students understand how meteorologists study humidity and predict weather
✔ Builds Critical Thinking Skills – Students interpret data, make calculations, and explain atmospheric processes
✔ Flexible for Multiple Levels – Easily adapted for middle school through high school learners
✔ Clear, Structured Flow – Simple to implement with guided steps for both students and teachers

What’s Included?

• Student Lab with step-by-step procedures, data tables, and analysis questions
• Instructor Answer Key with calculations, explanations, and guidance
• Detailed Teacher Guide to support setup, instruction, and deeper discussion

Required Materials:

• Sling psychrometers (required for outdoor data collection)

Get students out of their seats and into the science of the atmosphere with this engaging, ready-to-use lab that makes cloud formation something they can actually measure and understand.

Grades: 8–12 | Pages: 21 | Time: 45 minutes
NGSS Connections: MS-ESS2-5, MS-ESS2-6, HS-ESS2-4