How to Make a Rain Gauge With Precision

Scientists use professionally made rain gauges.

People use rain gauges to measure the amount of precipitation -- or rain - that falls in a particular location. People use rain gauges to aid in gardening and to collect information for meteorological research. Children can make a rain gauge for science fair projects or even just for fun. Some people make a rain gauge with nothing more than an open container and a ruler, but others prefer a slightly more sophisticated design for improved precision.

Things You'll Need

• plastic ruler made of transparent plastic
• tall round jar made of transparent glass
• rubber bands
• funnel
• weatherproof tape

Instructions

1. Clean the label off the jar and thoroughly wash it.

2. Set the jar on a table and lay the ruler along the jar lengthwise. Place the end of the ruler that begins with zero on the table. Use the rubber bands to affix the ruler to the jar.

3. Place the funnel in the jar with its mouth facing upward. Use a few strips of weather-proof tape to firmly affix it to the jar, taking care not to use excessive amounts of tape so that you can empty the gauge later.

4. Set the rain gauge in an open area away from trees or structures that might increase or diminish the amount of rain received by your rain gauge.

5. Empty your gauge between measurements by carefully removing and reapplying the tape affixing the funnel to the jar. Empty and dry the inside of the jar.

Tips & Warnings

• Check your rain gauge at a set time daily.

References

• University of Rhode Island: Rain Gauges: Your Most Important Garden Tool
• Encyclopedia Britannica: Climate
• The Franklin Institute: Make Your Own Rain Gauge
• Weather Scope: Make and Use a Rain Gauge to Measure Precipitation