Data Snapshots

Maps
Description
About This Snapshot:
read more
Difference from Average - Monthly
Was the month cooler or warmer than usual?  

Colors show where and by how much the average monthly temperature differed from the month’s average temperature from 1981-2010. Red areas were warmer than the 30-year average for the month and blue areas were cooler. White and very light areas had temperatures close to the long-term average.

Where do these measurements come from?  

Daily temperature readings come from ground-based weather stations in the Global Historical Climatology Network. Volunteer observers or automated instruments collect the highest and lowest temperature of the day at each station over the entire month,...

read more
About This Date: 
read more +