|Basically, any measuring glass left outside
can serve as a rain gauge. However, since most rain showers
are usually quite windy, you'll want to fasten your rain
gauge somewhere so that it doesn't blow over. Locate a good
place for your gauge. There should be nothing overhead, like
trees, electric wires, or the edge of a roof. These obstructions can
direct rainwater into or away from your gauge, creating a false reading.
The edge of a fence, away from the building, is often a good
place for your gauge.