Headline: September 2010 averaged above normal for the U.S.
Temperature Highlights - September 2010 (From NCDC)
September was the fourth consecutive month with above average U.S. temperatures. The average temperature was 1.7°F above the long-term average.
Most states had above average temperatures, and several others had monthly temperature rankings among their top 10 warmest: Rhode Island (third warmest), New Mexico (fourth), New Jersey (fourth), Colorado (fifth), Massachusetts (sixth), Florida (seventh), Connecticut (seventh), New Hampshire (seventh) Arizona (ninth), and Maine (ninth). No state had an average temperature ranking in the top ten coolest.
Regionally, the Southwest climate region experienced its third warmest September on record. Only the East North Central climate region had below-normal temperatures.