Phoenix AZ Average Temperatures 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

Phoenix Temperatures: Averages by Month

Days of Hot Weather in Phoenix

Number of Warm Nights a Month

References

More on Weather in Arizona