Phoenix Temperatures: Averages by Month





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.

The first set of high and low temperatures are averages for 2010 to 2019. Everything else here is based on 1991 to 2020 weather.

10-year temperature averages for Phoenix, 2010 to 2019
High °F Low °F   High °C Low °C
69 46 January 20 8
72 49 February 22 9
80 56 March 27 13
87 62 April 31 17
93 68 May 34 20
106 80 June 41 27
107 85 July 41 29
106 84 August 41 29
101 78 September 38 26
90 66 October 32 19
77 54 November 25 12
67 46 December 20 8
88 65 Year 31 18
30-year temperature averages for Phoenix, 1991 to 2020
High °F Low °F   High °C Low °C
68 46 January 20 8
71 49 February 22 9
78 55 March 26 13
86 61 April 30 16
95 70 May 35 21
104 79 June 40 26
107 85 July 41 29
105 84 August 41 29
100 78 September 38 26
89 66 October 32 19
77 54 November 25 12
66 45 December 19 7
87 64 Year 31 18

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 15 2 0
April 23 10 1
May 30 24 9
June 30 29 25
July 31 31 29
August 31 31 27
September 30 28 18
October 27 17 3
November 12 1 0
December 0 0 0
Year 234 173 111

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 rare in Phoenix, normally happening just once a year. Indeed, only 14 days a year on average get below 41 degrees.

Average number of nights for each month in Phoenix that stay above 50, 60 or 70 °F
  50 °F
10 °C
60 °F
16 °C
70 °F
21 °C
January 6 0 0
February 11 0 0
March 23 4 0
April 28 15 1
May 31 29 13
June 30 30 28
July 31 31 31
August 31 31 31
September 30 30 28
October 30 24 6
November 20 4 0
December 5 0 0
Year 277 198 139
References

Jay Lawrimore, Ron Ray, Scott Applequist, Bryant Korzeniewski, Matthew Menne. 2016. Global Summary of the Month and Year, Version 1.0. NOAA National Centers for Environmental Information.

NOAA National Centers for Environmental Information (NCEI). Climate Normals.

Phoenix Weather
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