Rain day
A rain day occurs when a daily rainfall of at least 0.2 mm is recorded.
Rainfall ...
day of rain"See rain day.
day"1. A basic time increment defined by the earth's motion; specifically, a complete revolution of the earth about its own axis.
thunderstorm day, rain day). The definition is somewhat arbitrary, depending upon the accepted criteria for a frost observation. Thus, it may be 1) a day on which the minimum air temperature in the thermometer shelter falls below 0°C (32°F); 2) a ...
 See also: Rain, Precipitation, Period, Ocean, Observation
  
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