Arizona climate guide

Temperature in Arizona (°F)

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Max temperature (daytime)
66°F maximum daytime temperature in January in Arizona (Phoenix)66
70°F maximum daytime temperature in February in Arizona (Phoenix)70
75°F maximum daytime temperature in March in Arizona (Phoenix)75
84°F maximum daytime temperature in April in Arizona (Phoenix)84
93°F maximum daytime temperature in May in Arizona (Phoenix)93
102°F maximum daytime temperature in June in Arizona (Phoenix)102
106°F maximum daytime temperature in July in Arizona (Phoenix)106
102°F maximum daytime temperature in August in Arizona (Phoenix)102
99°F maximum daytime temperature in September in Arizona (Phoenix)99
88°F maximum daytime temperature in October in Arizona (Phoenix)88
75°F maximum daytime temperature in November in Arizona (Phoenix)75
66°F maximum daytime temperature in December in Arizona (Phoenix)66
Min temperature (night-time)
39°F minimum night-time temperature in January in Arizona (Phoenix)39
43°F minimum night-time temperature in February in Arizona (Phoenix)43
46°F minimum night-time temperature in March in Arizona (Phoenix)46
52°F minimum night-time temperature in April in Arizona (Phoenix)52
61°F minimum night-time temperature in May in Arizona (Phoenix)61
68°F minimum night-time temperature in June in Arizona (Phoenix)68
77°F minimum night-time temperature in July in Arizona (Phoenix)77
75°F minimum night-time temperature in August in Arizona (Phoenix)75
70°F minimum night-time temperature in September in Arizona (Phoenix)70
57°F minimum night-time temperature in October in Arizona (Phoenix)57
46°F minimum night-time temperature in November in Arizona (Phoenix)46
39°F minimum night-time temperature in December in Arizona (Phoenix)39

Sunshine & Daylight in Arizona

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Daily hours of sunshine
Daily hours of daylight
10 hours of daylight per day in January in Arizona (Phoenix)10
11 hours of daylight per day in February in Arizona (Phoenix)11
12 hours of daylight per day in March in Arizona (Phoenix)12
13 hours of daylight per day in April in Arizona (Phoenix)13
14 hours of daylight per day in May in Arizona (Phoenix)14
14 hours of daylight per day in June in Arizona (Phoenix)14
14 hours of daylight per day in July in Arizona (Phoenix)14
13 hours of daylight per day in August in Arizona (Phoenix)13
12 hours of daylight per day in September in Arizona (Phoenix)12
11 hours of daylight per day in October in Arizona (Phoenix)11
10 hours of daylight per day in November in Arizona (Phoenix)10
10 hours of daylight per day in December in Arizona (Phoenix)10

Rainfall in Arizona

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Number of days with some rain
4 days with some rainfall in January in Arizona (Phoenix)4
4 days with some rainfall in February in Arizona (Phoenix)4
4 days with some rainfall in March in Arizona (Phoenix)4
2 days with some rainfall in April in Arizona (Phoenix)2
1 day with some rainfall in May in Arizona (Phoenix)1
1 day with some rainfall in June in Arizona (Phoenix)1
4 days with some rainfall in July in Arizona (Phoenix)4
5 days with some rainfall in August in Arizona (Phoenix)5
3 days with some rainfall in September in Arizona (Phoenix)3
3 days with some rainfall in October in Arizona (Phoenix)3
3 days with some rainfall in November in Arizona (Phoenix)3
4 days with some rainfall in December in Arizona (Phoenix)4
Average monthly rainfall (inches)
0.9 inches monthly rainfall in January in Arizona (Phoenix)0.9
0.8 inches monthly rainfall in February in Arizona (Phoenix)0.8
1.0 inches monthly rainfall in March in Arizona (Phoenix)1.0
0.3 inches monthly rainfall in April in Arizona (Phoenix)0.3
0.2 inches monthly rainfall in May in Arizona (Phoenix)0.2
0.1 inches monthly rainfall in June in Arizona (Phoenix)0.1
0.9 inches monthly rainfall in July in Arizona (Phoenix)0.9
1.3 inches monthly rainfall in August in Arizona (Phoenix)1.3
0.9 inches monthly rainfall in September in Arizona (Phoenix)0.9
0.7 inches monthly rainfall in October in Arizona (Phoenix)0.7
0.8 inches monthly rainfall in November in Arizona (Phoenix)0.8
1.0 inches monthly rainfall in December in Arizona (Phoenix)1.0

More climate for Arizona

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
UV Index (Maximum)
UV (maximum) index 3 (Moderate) in January in Arizona (Phoenix)3
UV (maximum) index 4 (Moderate) in February in Arizona (Phoenix)4
UV (maximum) index 6 (High) in March in Arizona (Phoenix)6
UV (maximum) index 8 (Very High) in April in Arizona (Phoenix)8
UV (maximum) index 10 (Very High) in May in Arizona (Phoenix)10
UV (maximum) index 10 (Very High) in June in Arizona (Phoenix)10
UV (maximum) index 11 (Extreme) in July in Arizona (Phoenix)11
UV (maximum) index 10 (Very High) in August in Arizona (Phoenix)10
UV (maximum) index 8 (Very High) in September in Arizona (Phoenix)8
UV (maximum) index 6 (High) in October in Arizona (Phoenix)6
UV (maximum) index 4 (Moderate) in November in Arizona (Phoenix)4
UV (maximum) index 3 (Moderate) in December in Arizona (Phoenix)3
Heat & Humidity
No heat & humidity in January in Arizona (Phoenix)0
No heat & humidity in February in Arizona (Phoenix)0
No heat & humidity in March in Arizona (Phoenix)0
Low heat & humidity in April in Arizona (Phoenix)L
High heat & humidity in May in Arizona (Phoenix)H
Very high heat & humidity in June in Arizona (Phoenix)VH
Extreme heat & humidity in July in Arizona (Phoenix)E
Very high heat & humidity in August in Arizona (Phoenix)VH
Very high heat & humidity in September in Arizona (Phoenix)VH
Moderate heat & humidity in October in Arizona (Phoenix)M
No heat & humidity in November in Arizona (Phoenix)0
No heat & humidity in December in Arizona (Phoenix)0

Note: 0 = None, L = Low, M = Moderate, H = High, VH = Very high, E = Extreme

Going to Arizona? Find the best month to visit Arizona based on the weather.

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Check climate guides for Arizona showing average temperature, rainfall & sunshine figures for each month of the year. The climate guide shown above is for Phoenix.

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More about Arizona

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

The climate guide for Arizona, represented by Phoenix, shows long term monthly weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C)  |  Imperial (°F)

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Arizona climate overview

Located in the southwest, Arizona is one of the largest US states. Famous for its clear, sunny skies and dry weather, and boasting spectacular, diverse scenery, the state is a major tourist magnet. Many Native Americans live in Arizona, and the Navajo Reservation in the north is the nation's largest.

Flat terrain and gently sloping valleys make up the southern and western third of the State, which is home to giant saguaro cacti with their trademark candelabra branches. In summer expect extreme heat and humidity in the south, with low rainfall in the sub-tropical southwest.

Other southern areas experience the 'summer monsoon', when moisture-laden air from the Gulf of Mexico brings thunderstorms in July and August. On occasions these can also penetrate far into the northern highlands. In winter temperatures in the south are mostly comfortable with no significant rain.

From Phoenix the ground rises steadily northwards towards Flagstaff and the highlands of the Colorado Plateau. Desert cacti give way to pine and fir trees as elevation increases. Temperatures in the north are cooler in all months, but rainfall levels still remain low.

The Grand Canyon slices into the flat, dry semi-desert of the north. Over millions of years, the Colorado and other rivers have carved deep canyons, revealing coloured rocks and soil now thousands of metres deep in places. Despite the increased elevation, the north of Arizona is still warm to hot in summer. However, winters are cold to below freezing with snows on the central peaks around Flagstaff.

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