What is the hottest month in Surprise?

July — average highs around 108° with lows near 84°.

What is the coldest month in Surprise?

January, when nights typically drop to 44° and days top out near 66°.

What is the rainiest month in Surprise?

March, averaging about 1.4 in of precipitation; the driest is April at roughly 0.1 in.

How warm is Surprise over the year?

The annual mean is 75°, with about 10 in of precipitation in a typical year (1991-2020 normals).

Surprise Climate — Monthly Normals 1991-2020

Climate in Surprise

The typical year in Surprise (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

256 mm

yearly total

Warmest month

Jul

⌀ max 42°C

Coldest month

Jan

⌀ min 6°C

Temperatures by month

typical high (orange) · typical low (blue)

Jan

44° … 66°

Feb

46° … 70°

Mar

51° … 76°

Apr

60° … 88°

May

68° … 95°

Jun

77° … 105°

Jul

84° … 108°

Aug

83° … 106°

Sep

77° … 101°

Oct

63° … 89°

Nov

52° … 76°

Dec

46° … 67°

Precipitation by month

monthly totals across the year

Jan

26 mm

Feb

30 mm

Mar

35 mm

Apr

2 mm

May

2 mm

Jun

7 mm

Jul

35 mm

Aug

21 mm

Sep

26 mm

Oct

24 mm

Nov

19 mm

Dec

29 mm

The short version

RegionArizona

Latitude33.6306°N

Annual mean23.8°C

Annual precipitation256 mm

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Weather map — Surprise

Surprise →

Source · 1991-2020 normals

Surprise, AZ Climate