BetaBetaDataset
To map out temperature of a region in a given month compared to the norm for that same month in the same region.
These maps do not depict absolute temperature but instead show temperature anomalies, or how much it has changed.
Data contains: shades of red and orange indicating areas where the average monthly temperatures are warmer than they were in that area during the base period from 1951-1980 and shades of blue show cooling compared to the base period.
Data is based on monthly mean station measurements of the Global Historical Climatology Network (GHCN) version 2, which is available monthly from the U.S. National Climatic Data Center.