Iowa weather by month

Check out Iowa weather averages by month. Compare detailed monthly climate statistics including temperature, rainfall and sunshine figures.

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Maximum daytime temperature °C
-2°C maximum daytime temperature in January in Des Moines-2
1°C maximum daytime temperature in February in Des Moines1
8°C maximum daytime temperature in March in Des Moines8
17°C maximum daytime temperature in April in Des Moines17
23°C maximum daytime temperature in May in Des Moines23
28°C maximum daytime temperature in June in Des Moines28
30°C maximum daytime temperature in July in Des Moines30
29°C maximum daytime temperature in August in Des Moines29
24°C maximum daytime temperature in September in Des Moines24
18°C maximum daytime temperature in October in Des Moines18
9°C maximum daytime temperature in November in Des Moines9
0°C maximum daytime temperature in December in Des Moines0
Hours of sunshine (daily)
Days with some rainfall
8 days with some rainfall in January in Des Moines8
7 days with some rainfall in February in Des Moines7
10 days with some rainfall in March in Des Moines10
11 days with some rainfall in April in Des Moines11
12 days with some rainfall in May in Des Moines12
10 days with some rainfall in June in Des Moines10
10 days with some rainfall in July in Des Moines10
9 days with some rainfall in August in Des Moines9
9 days with some rainfall in September in Des Moines9
8 days with some rainfall in October in Des Moines8
8 days with some rainfall in November in Des Moines8
9 days with some rainfall in December in Des Moines9

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Iowa by month

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

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The climate guide for Iowa (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.

Iowa temperature by month

Compare the average temperature by month for popular destinations in Iowa. Select a place from below to see more long term weather averages by month.

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Cedar Rapids
-3°C maximum daytime temperature in January in Cedar Rapids-3
0°C maximum daytime temperature in February in Cedar Rapids0
7°C maximum daytime temperature in March in Cedar Rapids7
16°C maximum daytime temperature in April in Cedar Rapids16
23°C maximum daytime temperature in May in Cedar Rapids23
27°C maximum daytime temperature in June in Cedar Rapids27
30°C maximum daytime temperature in July in Cedar Rapids30
28°C maximum daytime temperature in August in Cedar Rapids28
24°C maximum daytime temperature in September in Cedar Rapids24
18°C maximum daytime temperature in October in Cedar Rapids18
8°C maximum daytime temperature in November in Cedar Rapids8
0°C maximum daytime temperature in December in Cedar Rapids0
Des Moines
-2°C maximum daytime temperature in January in Des Moines-2
1°C maximum daytime temperature in February in Des Moines1
8°C maximum daytime temperature in March in Des Moines8
17°C maximum daytime temperature in April in Des Moines17
23°C maximum daytime temperature in May in Des Moines23
28°C maximum daytime temperature in June in Des Moines28
30°C maximum daytime temperature in July in Des Moines30
29°C maximum daytime temperature in August in Des Moines29
24°C maximum daytime temperature in September in Des Moines24
18°C maximum daytime temperature in October in Des Moines18
9°C maximum daytime temperature in November in Des Moines9
0°C maximum daytime temperature in December in Des Moines0
Dubuque
-4°C maximum daytime temperature in January in Dubuque-4
-1°C maximum daytime temperature in February in Dubuque-1
6°C maximum daytime temperature in March in Dubuque6
15°C maximum daytime temperature in April in Dubuque15
21°C maximum daytime temperature in May in Dubuque21
26°C maximum daytime temperature in June in Dubuque26
29°C maximum daytime temperature in July in Dubuque29
27°C maximum daytime temperature in August in Dubuque27
23°C maximum daytime temperature in September in Dubuque23
16°C maximum daytime temperature in October in Dubuque16
7°C maximum daytime temperature in November in Dubuque7
-1°C maximum daytime temperature in December in Dubuque-1
Sioux City
-2°C maximum daytime temperature in January in Sioux City-2
1°C maximum daytime temperature in February in Sioux City1
8°C maximum daytime temperature in March in Sioux City8
17°C maximum daytime temperature in April in Sioux City17
23°C maximum daytime temperature in May in Sioux City23
28°C maximum daytime temperature in June in Sioux City28
31°C maximum daytime temperature in July in Sioux City31
29°C maximum daytime temperature in August in Sioux City29
24°C maximum daytime temperature in September in Sioux City24
18°C maximum daytime temperature in October in Sioux City18
8°C maximum daytime temperature in November in Sioux City8
-1°C maximum daytime temperature in December in Sioux City-1

All Iowa destinations

Iowa weather averages by month

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
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

Sunshine & UV index 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
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

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

Tropical storm risk: Iowa hurricane season

% of month affected by tropical storms
0
0
0
0
0
0
0
0
0
0
0
0
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Compare Iowa weather with the UK

The weather chart below compares the average monthly maximum daytime temperature for Iowa, USA (Des Moines) and the UK (London).

Maximum daytime temperature (°C)

Iowa, USA (Des Moines)
UK (London)
7
1
7
8
10
17
13
23
17
28
20
30
22
29
22
24
19
18
15
9
10
0
8
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
-2

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

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