Narrative Summary - July 2009

July 2009 was warmer than normal, averaging 79.7ºF, 3.4º above normal (76.3ºF). The hottest July
(1985) averaged 82.2ºF, while the coolest (1993) averaged 70.5ºF. There were 25 days in July with
maximum temperatures >= 90ºF compared to a July normal of 19. There have been 36 days this year with
maximum temperatures >= 90ºF compared to a normal (through July) of 30 days. There were 13 days in
July with maximum temperatures >= 100ºF compared to a July normal of 6. There have been 13 days this
year with maximum temperatures >= 100ºF compared to a normal (through July) of 7. No daily
temperatures records were established during July 2009.

Precipitation for July 2009 totaled only a Trace, 0% of normal (0.27 inch). The wettest July (1993)
received 1.76 inches, while the driest (2003) received no precipitation. Total precipitation for 2009
(through July) is 3.32 inches, 87% of normal (3.80 inches).

The average wind speed for July 2009 was 8.3 miles per hour (mph), which was 0.3 mph below normal
(8.6 mph). The windiest July (1983) averaged 10.7 mph, while the July with the lightest winds (1955)
averaged 6.8 mph. The peak gust for July 2009 was 50 mph on July 6. The record wind gust for July was
69 mph in 1979.

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 Staff372-2716

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.