Climateby Month

Phoenix, AZ climate by month

NOAA 1991-2020 normals · 1,088 ft elevation · also covers Chandler, Scottsdale

Summers in Phoenix are very hot; winters are mild. Highs peak at 107°F in July and fall to 66°F in December. The wettest month is August (about 5 wet days) and the driest is June (about 1). The most comfortable time to visit is January and February.

Warmest month
107°F
July normal high
Coldest month
45°F
December normal low
Wet days a year
33
7.2 in of precipitation
Muggy days a year
12
dew point 65°F or higher

How warm is Phoenix?

Normal highs range from 66°F in December to 107°F in July.

40°60°80°100°120° January: normal high 68°F (20°C), low 46°F (8°C) February: normal high 71°F (22°C), low 49°F (9°C) March: normal high 78°F (26°C), low 55°F (13°C) April: normal high 86°F (30°C), low 61°F (16°C) May: normal high 95°F (35°C), low 70°F (21°C) June: normal high 104°F (40°C), low 79°F (26°C) July: normal high 107°F (42°C), low 85°F (29°C) 107° 85° August: normal high 105°F (41°C), low 84°F (29°C) September: normal high 100°F (38°C), low 78°F (26°C) October: normal high 89°F (32°C), low 66°F (19°C) November: normal high 77°F (25°C), low 54°F (12°C) December: normal high 66°F (19°C), low 45°F (7°C) 66° 45° JFMAMJJASOND

Bars run from the normal low to the normal high for each month.

How rainy is Phoenix?

August has the most wet days (about 5); the year brings about 7.2 in of precipitation.

January: 4 wet days February: 4 wet days March: 3 wet days April: 2 wet days May: 1 wet days June: 1 wet days 1 July: 4 wet days August: 5 wet days 5 September: 3 wet days October: 2 wet days November: 2 wet days December: 4 wet days JFMAMJJASOND

Wet day: at least 0.01 in of rain or melted snow, counted from daily records 1991-2020.

How humid is Phoenix?

Muggy days peak in August, at about 5 days.

January: 0 muggy days 0 February: 0 muggy days March: 0 muggy days April: 0 muggy days May: 0 muggy days June: 0 muggy days July: 4 muggy days August: 5 muggy days 5 September: 2 muggy days October: 0 muggy days November: 0 muggy days December: 0 muggy days JFMAMJJASOND

Muggy day: daily mean dew point of 65°F or higher, from hourly observations 1991-2020 at Phoenix Sky Harbor Intl Airport, 4.3 mi ESE of the city center.

How much daylight?

Daylight ranges from about 10.0 hours in December to 14.3 hours in June.

January: 10.2 hours of daylight February: 11.0 hours of daylight March: 12.0 hours of daylight April: 13.0 hours of daylight May: 13.9 hours of daylight June: 14.3 hours of daylight 14.3 July: 14.1 hours of daylight August: 13.4 hours of daylight September: 12.4 hours of daylight October: 11.3 hours of daylight November: 10.4 hours of daylight December: 10.0 hours of daylight 10.0 JFMAMJJASOND
See all numbers
Monthly climate normals and day counts for Phoenix, 1991-2020
MonthHighLowPrecip.Wet daysMuggy daysDaylight
January 68°F46°F 0.9 in4 0 10.2 h
February 71°F49°F 0.9 in4 0 11.0 h
March 78°F55°F 0.8 in3 0 12.0 h
April 86°F61°F 0.2 in2 0 13.0 h
May 95°F70°F 0.1 in1 0 13.9 h
June 104°F79°F 0.02 in1 0 14.3 h
July 107°F85°F 0.9 in4 4 14.1 h
August 105°F84°F 0.9 in5 5 13.4 h
September 100°F78°F 0.6 in3 2 12.4 h
October 89°F66°F 0.6 in2 0 11.3 h
November 77°F54°F 0.6 in2 0 10.4 h
December 66°F45°F 0.7 in4 0 10.0 h

High and low: NOAA 1991-2020 normal daily high and low. Wet days: at least 0.01 in of rain or melted snow. Muggy days: daily mean dew point 65°F or higher.

Best months to visit Phoenix

By our comfort score, the best months are January and February.

Comfort score by month (0-100) and its parts, in days per month
MonthScoreComfortableNotable rainHot or cold
Jan 732120
Feb 741920
Mar 701622
Apr 577110
May 442024
Jun 390029
Jul 360231
Aug 340231
Sep 330128
Oct 455117
Nov 691711
Dec 701920

Score = 40 × share of comfortable days + 25 × share of days without notable rain + 20 × share of days neither hot (90°F+) nor cold (high 40°F or below) + 15 × daylight. How the score works.

Frost dates in Phoenix

A night at 32°F or below happens in about 18% of years in Phoenix, so there is no typical frost date. In most years there is no frost at all.

Station: Phoenix Sky Harbor Intl Airport (USW00023183), NOAA 1991-2020 freeze probabilities. Frost dates for every city in Arizona.

Hottest and coldest readings, 1991-2020

The highest reading was 121°F (July 28, 1995); the lowest was 29°F (January 15, 2013, and 2 other days).

From the temperature station's daily records with NOAA quality flags removed. Not an all-time record.

Near Phoenix

Similar climates elsewhere

Also covers

Chandler and Scottsdale use the same temperature and rain stations as Phoenix, so their monthly numbers are the ones on this page.

Where the numbers come from

  • Temperature, rain, frost dates and humidity and wind by hour: Phoenix Sky Harbor Intl Airport (USW00023183), 4.3 mi ESE of the city center, 1,107 ft . NOAA normals and daily records, 1991-2020.
  • Snowfall and snow depth: Tempe ASU (USC00028499), 8.9 mi E of the city center, 1,167 ft (79 ft higher than the city). NOAA normals and daily records, 1991-2020.
  • Daily humidity and wind: Phoenix Sky Harbor Intl Airport (722780-23183), 4.3 mi ESE of the city center, 1,113 ft . Hourly observations, 1991-2020.
  • Not available for this location: cloud cover (no station close enough or similar enough in elevation).

Distances from the city center (USGS). Methodology · Report an error