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Data Snapshots

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Average Monthly Temperature
What was the average temperature?  

Colors show the average monthly temperature across each of the 344 climate divisions of the contiguous United States. Climate divisions shown in white or very light colors had average temperatures near 50°F. Blue areas on the map were cooler than 50°F; the darker the blue, the cooler the average temperature. Orange to red areas were warmer than 50°F; the darker the shade, the warmer the monthly average temperature.

Where do these measurements come from?  

Temperature readings come from weather stations in the Global Historical Climatology Network. Scientists collect the highest and lowest temperature of the day at each station for the entire month. After they check data quality, they calculate the sta...

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