Data Snapshots

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30-yr averages by month: Precip
How much rain and snow usually fall this month?  

Based on daily observations from 1981-2010, colors on the map show long-term average precipitation totals in each climate division for the month displayed. The darker the color, the higher the total precipitation. 

Where do these measurements come from?  

Daily totals of rain and snow come from weather stations in the Global Historical Climatology Network. Volunteer observers or automated instruments gathered the data from 1981 to 2010 and submitted it to the National Center for Environmental Informat...

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