Contiguous United States cooler and slightly wetter than average during Spring 2013 According to NOAA scientists, the average temperature for the contiguous United States during the spring season (March-May) was 50.5°F, 0.5°F below the 20th-century average, making it the 38th coolest spring on record. The average May temperature for the contiguous U.S. was 61.0°F, 0.9°F above the 20th-century average and the 40th warmest May on record.
See our list of NOAA social media
and mobile sites