TEMPERATURE STATS FROM OUR OWN U.S. GOVERNMENT
CONTIGUOUS UNITED STATES
The average temperature in December 2009 was 30.2 F. This was -3.2 F cooler than the 1901-2000 (20th century) average, the 14th coolest December in 115 years. The temperature trend for the period of record (1895 to present) is 0.1 degrees Fahrenheit per decade.
If you thought it was cold in December, you are so right!