This map shows how temperatures varied from the long-term mean in March 2017. Europe and all of Russia were again much warmer than the 1951-1980 base period. Much of the United States was also relatively warm, but Alaska was cool. (Source: NASA GISS) The home planet just experienced its second warmest March on record, according to an analysis released by NASA last week. The agency's temperature records go all the way back to 1880 From the analysis: