Iowa climate guide

Temperature in Iowa (°C)

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Max temperature (daytime)
-2°C maximum daytime temperature in January in Iowa (Des Moines)-2
1°C maximum daytime temperature in February in Iowa (Des Moines)1
8°C maximum daytime temperature in March in Iowa (Des Moines)8
17°C maximum daytime temperature in April in Iowa (Des Moines)17
23°C maximum daytime temperature in May in Iowa (Des Moines)23
28°C maximum daytime temperature in June in Iowa (Des Moines)28
30°C maximum daytime temperature in July in Iowa (Des Moines)30
29°C maximum daytime temperature in August in Iowa (Des Moines)29
24°C maximum daytime temperature in September in Iowa (Des Moines)24
18°C maximum daytime temperature in October in Iowa (Des Moines)18
9°C maximum daytime temperature in November in Iowa (Des Moines)9
0°C maximum daytime temperature in December in Iowa (Des Moines)0
Min temperature (night-time)
-12°C minimum night-time temperature in January in Iowa (Des Moines)-12
-9°C minimum night-time temperature in February in Iowa (Des Moines)-9
-3°C minimum night-time temperature in March in Iowa (Des Moines)-3
4°C minimum night-time temperature in April in Iowa (Des Moines)4
10°C minimum night-time temperature in May in Iowa (Des Moines)10
16°C minimum night-time temperature in June in Iowa (Des Moines)16
19°C minimum night-time temperature in July in Iowa (Des Moines)19
17°C minimum night-time temperature in August in Iowa (Des Moines)17
12°C minimum night-time temperature in September in Iowa (Des Moines)12
5°C minimum night-time temperature in October in Iowa (Des Moines)5
-2°C minimum night-time temperature in November in Iowa (Des Moines)-2
-9°C minimum night-time temperature in December in Iowa (Des Moines)-9

Sunshine & Daylight in Iowa

  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 Iowa (Des Moines)10
11 hours of daylight per day in February in Iowa (Des Moines)11
12 hours of daylight per day in March in Iowa (Des Moines)12
13 hours of daylight per day in April in Iowa (Des Moines)13
15 hours of daylight per day in May in Iowa (Des Moines)15
15 hours of daylight per day in June in Iowa (Des Moines)15
15 hours of daylight per day in July in Iowa (Des Moines)15
14 hours of daylight per day in August in Iowa (Des Moines)14
12 hours of daylight per day in September in Iowa (Des Moines)12
11 hours of daylight per day in October in Iowa (Des Moines)11
10 hours of daylight per day in November in Iowa (Des Moines)10
9 hours of daylight per day in December in Iowa (Des Moines)9

Rainfall in Iowa

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Number of days with some rain
8 days with some rainfall in January in Iowa (Des Moines)8
7 days with some rainfall in February in Iowa (Des Moines)7
10 days with some rainfall in March in Iowa (Des Moines)10
11 days with some rainfall in April in Iowa (Des Moines)11
12 days with some rainfall in May in Iowa (Des Moines)12
10 days with some rainfall in June in Iowa (Des Moines)10
10 days with some rainfall in July in Iowa (Des Moines)10
9 days with some rainfall in August in Iowa (Des Moines)9
9 days with some rainfall in September in Iowa (Des Moines)9
8 days with some rainfall in October in Iowa (Des Moines)8
8 days with some rainfall in November in Iowa (Des Moines)8
9 days with some rainfall in December in Iowa (Des Moines)9
Average monthly rainfall (mm)
24 mm monthly rainfall in January in Iowa (Des Moines)24
28 mm monthly rainfall in February in Iowa (Des Moines)28
58 mm monthly rainfall in March in Iowa (Des Moines)58
87 mm monthly rainfall in April in Iowa (Des Moines)87
98 mm monthly rainfall in May in Iowa (Des Moines)98
115 mm monthly rainfall in June in Iowa (Des Moines)115
100 mm monthly rainfall in July in Iowa (Des Moines)100
105 mm monthly rainfall in August in Iowa (Des Moines)105
91 mm monthly rainfall in September in Iowa (Des Moines)91
66 mm monthly rainfall in October in Iowa (Des Moines)66
46 mm monthly rainfall in November in Iowa (Des Moines)46
33 mm monthly rainfall in December in Iowa (Des Moines)33

More climate for Iowa

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
UV Index (Maximum)
UV (maximum) index 1 (Low) in January in Iowa (Des Moines)1
UV (maximum) index 2 (Low) in February in Iowa (Des Moines)2
UV (maximum) index 4 (Moderate) in March in Iowa (Des Moines)4
UV (maximum) index 6 (High) in April in Iowa (Des Moines)6
UV (maximum) index 8 (Very High) in May in Iowa (Des Moines)8
UV (maximum) index 9 (Very High) in June in Iowa (Des Moines)9
UV (maximum) index 9 (Very High) in July in Iowa (Des Moines)9
UV (maximum) index 8 (Very High) in August in Iowa (Des Moines)8
UV (maximum) index 6 (High) in September in Iowa (Des Moines)6
UV (maximum) index 4 (Moderate) in October in Iowa (Des Moines)4
UV (maximum) index 2 (Low) in November in Iowa (Des Moines)2
UV (maximum) index 1 (Low) in December in Iowa (Des Moines)1
Heat & Humidity
No heat & humidity in January in Iowa (Des Moines)0
No heat & humidity in February in Iowa (Des Moines)0
No heat & humidity in March in Iowa (Des Moines)0
No heat & humidity in April in Iowa (Des Moines)0
No heat & humidity in May in Iowa (Des Moines)0
Low heat & humidity in June in Iowa (Des Moines)L
High heat & humidity in July in Iowa (Des Moines)H
Moderate heat & humidity in August in Iowa (Des Moines)M
No heat & humidity in September in Iowa (Des Moines)0
No heat & humidity in October in Iowa (Des Moines)0
No heat & humidity in November in Iowa (Des Moines)0
No heat & humidity in December in Iowa (Des Moines)0

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

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

The climate guide for Iowa, represented by Des Moines, 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.

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Metric (°C / mm)  |  Imperial (°F / inches)

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