Iowa City Weather Year-Round — Best Time to Visit
Iowa City, United States has mild weather year-round. The best time to visit is September (score: 86/100). Annual average high: 15°C, total rainfall: 915mm.
When is the best time to visit Iowa City?
86
September is the best month to visit Iowa City with a travel score of 86/100 (Excellent).
Expect highs of 24.1°C, 7 rain days, and 10 hours of daily sunshine.
View September weather details →Travel Score by Month
41
Jan
48
Feb
58
Mar
66
Apr
75
May
81
Jun
85
Jul
85
Aug
86
Sep
70
Oct
59
Nov
45
Dec
Excellent (80+)
Good (60-79)
Mixed (40-59)
Poor (<40)
What are the average temperatures in Iowa City each month?
15°C
Avg High
5.7°C
Avg Low
915mm
Annual Rain
How much rain does Iowa City get?
Iowa City receives 915mm of rain annually. The wettest month is typically June with 119mm, while January is the driest.
What is the weather like each month in Iowa City?
January
41
-2°C
Low: -10°C
7 rain days
Mixed
February
48
1°C
Low: -8°C
6 rain days
Mixed
March
58
9°C
Low: -1°C
9 rain days
Mixed
April
66
16°C
Low: 5°C
11 rain days
Good
May
75
21°C
Low: 11°C
12 rain days
Good
June
81
27°C
Low: 17°C
11 rain days
Excellent
July
85
28°C
Low: 19°C
9 rain days
Excellent
August
85
28°C
Low: 19°C
9 rain days
Excellent
September
Best time to visit86
24°C
Low: 15°C
7 rain days
Excellent
October
70
17°C
Low: 8°C
8 rain days
Good
November
59
9°C
Low: 1°C
7 rain days
Mixed
December
45
2°C
Low: -6°C
7 rain days
Mixed
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Data based on 1994–2024 averages · Last updated: 2024-12-31