Phoenix Temperatures: Averages by Month

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The numbers here tell you how hot and cold the weather usually is in Phoenix, Arizona during each month of the year.

The average high and low temperatures are listed below by month and annually for Phoenix, in both degrees Fahrenheit and Celsius.

Maximums and minimums are only part of the temperature picture. To fill in the rest, there's information on how many days a month get above or below a given temperature.

To find out how often it rises over 80, 90 or 100 °F each month in Phoenix, scroll down farther. There are also monthly and yearly counts of nights with warm temperatures.

All the numbers are averages, based on climate data gathered from 1981 to 2010.

Average Phoenix temperatures
High °F Low °F   High °C Low °C
  69 46 January 20   8
  72 49 February 22   9
  78 54 March 26 12
  86 60 April 30 16
  95 69 May 35 21
104 77 June 40 25
106 83 July 41 28
104 82 August 40 28
100 75 September 38 24
  89 64 October 32 18
  76 52 November 25 11
  67 45 December 20   7
  87 63 Year 31 17

Days of Hot Weather in Phoenix

Nearly every day during summer, the temperature in Phoenix tops 99°F. Even during winter months, while it seldom reaches 80, the days will usually get to at least 60 degrees.

Days per month in Phoenix of at least 80, 90 or 100 °F
  80 °F
27 °C
90 °F
32 °C
100 °F
38 °C
January     1     0     0
February     4     0     0
March   13     2     0
April   24   10     1
May   30   24     7
June   30   30   24
July   31   31   29
August   31   31   27
September   30   28   17
October   28   16     2
November   10     0     0
December     0     0     0
Year 232 171 107

Number of Warm Nights a Month

When the day-time highs in Phoenix are over 100°F, the nights usually stay above 70. Any month of the year has nights when the thermometer doesn't drop below 50.

Freezing weather is not normal in Phoenix. Indeed, only 14 days a year on average get below 41 degrees.

Average number of days monthly in Phoenix that stay above 50, 60 or 70 °F
  50 °F
10 °C
60 °F
16 °C
70 °F
21 °C
January     7     0     0
February   12     1     0
March   23     5     0
April   28   15     2
May   31   29   15
June   30   30   28
July   31   31   31
August   31   31   31
September   30   30   25
October   30   24     6
November   19     3     0
December     5     0     0
Year 276 198 137
Reference

National Climatic Data Center. NOAA's 1981-2010 Climate Normals.

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