- Step 1: Attach ruler Attach a ruler to the inside of the glass jar using clear, waterproof tape. Make sure the ruler touches the jar bottom.
- TIP: Break the ruler in half to better fit inside the jar.
- Step 2: Glue to wood Glue the jar to a block of wood to create stability in strong winds. Make sure the wood block is heavy enough to stand up to tumultuous weather.
- Step 3: Place in open area Place the jar in an open area when the weather forecast calls for precipitation.
- TIP: Avoid placing the rain gauge beneath trees, next to your home, or other structures.
- Step 4: Measure the rainfall Measure the rainfall as soon as possible after a rain to avoid loss from evaporation. Calculate the measurement to the nearest tenth of an inch.
- Step 5: Record rainfall Record rainfall measurements from your rain gauge for a period of months to track precipitation and compare months and seasons. Now, use your data to your advantage and plan the best time for your favorite outdoor activities.
- FACT: As of 2008, Las Vegas was the driest major U.S. city, receiving 4.49 inches of rain annually.
You Will Need
- waterproof tape
- Straight-sided glass jar
- Wood block
- Rainy day