What is the hottest month in Phoenix?

July — average highs around 107° with lows near 85°.

What is the coldest month in Phoenix?

January, when nights typically drop to 42° and days top out near 66°.

What is the rainiest month in Phoenix?

July, averaging about 2.0 in of precipitation; the driest is May at roughly 0.1 in.

How warm is Phoenix over the year?

The annual mean is 75°, with about 13 in of precipitation in a typical year (1991-2020 normals).

Phoenix Climate — Monthly Normals 1991-2020

Climate in Phoenix

The typical year in Phoenix (Arizona), from 1991-2020 normals. For what's happening now, see the current forecast; a month ahead — the 30-day outlook.

Annual mean temp

23.8°C

average across 12 months

Annual precipitation

320 mm

yearly total

Warmest month

Jul

⌀ max 41°C

Coldest month

Jan

⌀ min 5°C

Temperatures by month

typical high (orange) · typical low (blue)

Jan

42° … 66°

Feb

45° … 70°

Mar

50° … 76°

Apr

60° … 88°

May

68° … 95°

Jun

78° … 105°

Jul

85° … 107°

Aug

83° … 106°

Sep

77° … 101°

Oct

63° … 89°

Nov

52° … 77°

Dec

45° … 67°

Precipitation by month

monthly totals across the year

Jan

26 mm

Feb

31 mm

Mar

37 mm

Apr

3 mm

May

2 mm

Jun

6 mm

Jul

51 mm

Aug

32 mm

Sep

34 mm

Oct

41 mm

Nov

22 mm

Dec

35 mm

The short version

RegionArizona

Latitude33.4484°N

Annual mean23.8°C

Annual precipitation320 mm

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Source · 1991-2020 normals

Phoenix, AZ Climate