Phoenix, AZ Climate

Summary Graph

The summary climate graph for Phoenix, 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.

Graph of average and extreme temperature ranges by day for Phoenix, AZ.


The warmest month in Phoenix Sky HAir Reserve Baseor International, Phoenix, Arizona is July with an average high temperature of 107.1°F. The hottest day on record was July 16 1979 when the temperature hit 122.9°F. During December the overnight temperature drops to an average of 43.5°F with the lowest temperature of 25.0°F being recorded on November 20 1985.

Warmest Days

Warmest Months

Coldest Days

Coldest Months

The warmest days on record are:

16 Jul 1979122.9°F
27 Jun 1990122°F
29 Jul 1995120°F
5 Jul 1989118°F
22 Jul 2006118°F

The warmest months on average were:

July 1989111.2°F
July 2009110.8°F
August 2011110.2°F
July 2003110.1°F
July 2005109.2°F

The coldest days on record are:

20 Nov 198525°F
9 Dec 197825.9°F
25 Dec 197426.1°F
3 Jan 197626.1°F
24 Dec 199026.1°F

The coldest months on average were:

December 197435.8°F
January 197536.2°F
February 197537.8°F
February 197438.7°F
January 197938.9°F


The wettest month by average rainfall in Phoenix, AZ is January with an average of 1.6 inches of rain falling on 4 to 5 days.Although in July it typically rains on more days with 1.2 inches falling in 5 to 6 days. The driest month in Phoenix, AZ is June with an average of 0.2 inches of rain falling on 1 to 2 days.

Wettest Days

The wettest days on record are:

28 July 19842.8 inches
14 July 20081.3 inches
15 July 19991.2 inches
26 July 20061.1 inches
13 July 19731 inches

Wettest Months

The wettest months on record are:

January 197322.3 inches
March 197310.8 inches
April 19949 inches
January 19937.4 inches
July 19846.8 inches

Driest Months

The driest months on record are:

June 19820 inches
May 19780 inches
November 19770 inches
September 19780 inches
April 19820 inches