The summary climate graph for Mesa, AZ shows a selection of temperature, rainfall and snow minimum, mean and maximum measures over the course of a year. Click on each of the measures in the key to toggle them on and off.
The warmest month in Phoenix-Mesa Gateway, Mesa, Arizona is July with an average high temperature of 103.0°F. The hottest day on record was August 5 2010 when the temperature hit 120.2°F. During January the overnight temperature drops to an average of 40.8°F with the lowest temperature of 20.3°F being recorded on January 5 1950.
The warmest days on record are:
| 5 Aug 2010 | 120.2°F |
| 28 Jun 1990 | 120°F |
| 25 Jun 1970 | 117.3°F |
| 21 Jun 2005 | 116.6°F |
| 17 Jul 2005 | 116.6°F |
The warmest months on average were:
| July 2009 | 110°F |
| July 2005 | 108.8°F |
| August 2011 | 108.4°F |
| August 2009 | 107.5°F |
| July 1947 | 107.5°F |
The coldest days on record are:
| 5 Jan 1950 | 20.3°F |
| 11 Jan 1964 | 20.3°F |
| 7 Jan 1967 | 20.3°F |
| 15 Jan 2007 | 21.2°F |
| 19 Dec 1968 | 21.4°F |
The coldest months on average were:
| January 1964 | 32.4°F |
| February 1964 | 33.7°F |
| December 1968 | 34.9°F |
| December 1953 | 34.9°F |
| January 1967 | 35.8°F |
The wettest month by average rainfall in Mesa, AZ is March with an average of 0.4 inches of rain falling on 4 to 5 days.Although in July it typically rains on more days with 0.2 inches falling in 5 to 6 days. The driest month in Mesa, AZ is June with an average of 0.0 inches of rain falling on 1 to 2 days.
The wettest days on record are:
| 29 June 1978 | 0.3 inches |
| 30 June 1976 | 0.2 inches |
| 8 June 1992 | 0.1 inches |
| 26 June 1986 | 0.1 inches |
| 14 June 1973 | 0 inches |
The wettest months on record are:
| September 1983 | 4.7 inches |
| August 1990 | 3.4 inches |
| March 1983 | 3 inches |
| April 1988 | 3 inches |
| February 1987 | 2.9 inches |
The driest months on record are:
| December 2012 | 0 inches |
| April 1942 | 0 inches |
| May 1942 | 0 inches |
| June 1942 | 0 inches |
| July 1942 | 0 inches |