May 2007 was a warm month for the U.S.

Source: NOAA Satellite & Information Service.

For Pittsburgh, PA:

The average temperature in May 2007 was 63.7 F. This was 3.7 F warmer than the 1948-2007 average, the 9th warmest May on record (1948-2007).

1.94 inches of precipitation fell in May. This was -1.74 inches less than the 1948-2007 average, the 10th driest such month on record (1948-2007).

Source: NOAA Satellite & Information Service.