Narrative Summary - December 2007

The average temperature for December 2007 was warmer than normal, averaging 32.7ºF, 1.0º above normal
(31.7ºF). The warmest December (1957) averaged 38.5ºF, while the coldest (1985) averaged 21.0ºF. The
following temperatures records were established during December 2007:

			   New	Old
Date	Category       	Record	Record	Year
  3	High Maximum	  63	  62	1982
  4	High Maximum	  63	  60	1975
 19	High Minimum	  41	  41	1994  Tied Record

Precipitation for December 2007 totaled 0.53 inches, 48% of normal (1.11 inches). The wettest December
(1996) received 3.69 inches, and the driest (1999) received 0.07 inch. Snowfall for December totaled 2.6
inches, compared to a normal of 5.8 inches. The snowiest December on record (1996) received 22.6 inches.

The average wind speed for December 2007 was 7.6 miles per hour (mph), which was 1.5 mph above normal
(6.1 mph). The windiest December on record (1968) averaged 8.3 mph, while the December with the lightest
winds (1985) averaged 3.3 mph. The peak gust for December 2007 was 60 mph on December 29.

Calendar year 2007 averaged 53.5ºF, which was slightly below normal (53.6ºF). The warmest years (1992 and
1998) averaged 56.4ºF, while the coolest year (1985) averaged 49.6ºF. The hottest temperature during 2007
was 110ºF on July 5. The coldest temperature was 4ºF on February 13 and 15. Precipitation for 2007 totaled
5.48 inches, 79% of normal (6.98 inches). The wettest year (1995) received 12.31 inches, while the driest
(1976) received 2.99 inches. Calendar year 2007 snowfall totaled 6.3 inches, compared to a normal of 15.4
inches.

The monthly climatological data summaries, as well as other information, are available on the Internet.
Address: http://hms.pnl.gov/

For additional information contact:
Ken Burk373-3215
HMS Office373-2716

Note: The information in this summary pertains specifically to
the Hanford Meteorology Station (HMS), which is located
approximately 25 miles northwest of Richland, Washington. No
attempt should be made to infer meteorological conditions at other
locations from these data.