All-Time Monthly Heat Records Set in Arizona

For previous record temperature posts, see:
Record Heat
Record Cold

The National Weather Service reports that July 2009 was the hottest month ever recorded in Phoenix and Yuma, Arizona:

With July 2009 now over it will go down as not only the hottest July on record but the hottest month of all-time in both Phoenix and Yuma (as determined by average temperature, see tables below). The data below represent the top ten warmest Julys for Phoenix and Yuma by average high, mean, and low temperatures. Records for Phoenix began in 1896 and for Yuma in 1878.

Phoenix, AZ
Top 10 Hottest Julys
Rank  Average Max      Average         Average Min
      Temperature (°F) Temperature (°F) Temperature (°F)
1     109.8 1989       98.3 2009        87.1 2009
2     109.5 2009       97.6 2003        86.6 2003
3     109.5 2005       97.4 1989        86.4 2006
4     108.7 2003       97.2 2005        85.0 2005
5     108.3 1978       96.5 2006        85.0 1989
6     108.1 1979       96.1 1988        84.8 2007
7     107.6 1980       96.0 2002        84.8 2002
8     107.5 1988       95.8 2007        84.8 1988
9     107.5 1933       95.6 1980        84.8 1981
10    107.5 1931       95.5 1983        84.2 1996

Yuma, AZ
Top 10 Hottest Julys
Rank  Average Max      Average          Average Min
      Temperature (°F) Temperature (°F) Temperature (°F)
1     110.8 1957       97.5 2009        86.0 2006
2     110.4 1989       97.2 2006        85.0 2009
3     110.3 1942       96.7 1959        84.5 1996
4     110.2 1960       96.4 1996        83.9 1959
5     110.0 2009       96.3 1989        83.6 1998
6     109.7 1994       96.3 1957        83.3 2003
7     109.5 1878       96.0 1998        83.0 2005
8     109.4 1959       95.7 2005        83.0 2002
9     109.3 1951       95.7 1994        82.8 2007
10    109.2 1958       95.7 1960        82.8 1990