The March-May spring season was the 36th coolest on record for the contiguous United States, according to an analysis by NOAA’s National Climatic Data Center in Asheville, N.C. Separately, last month ended as the 34th coolest May for the contiguous United States, based on records dating back to 1895.
See full size map here
The average spring temperature of 51.4 degrees F was 0.5 degree F below the 20th century average. The average May temperature of 60.3 degrees F was 0.7 degree F below the 20th century mean, based on preliminary data.
For the spring, Missouri had its fourth wettest, Arkansas its sixth wettest, Indiana and Iowa their eighth wettest and Illinois its 10th wettest. For May, Arizona, Maryland, and Nebraska were much wetter than average, with Nebraska ranking fourth wettest and Maryland fifth wettest on record. California had its driest spring on record, while Nevada and Utah had their 10th and 11th driest on record.
See full size map here