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Monthly
Precipitation
Temperature
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Temperature Unit Selection
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°Fahrenheit
Monthly Historical Averages
Grimes, IA
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May
Average Temperature
High
22°
Feels 22
Low
11°
Feels 10
Average Precipitation
13 Days
Rain amount
98.4mm
Snow amount
0.1cm
Content continues below
Daily Historical Averages
May 2026
S
M
T
W
T
F
S
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
30°
28
30°
29
29°
30
29°
31
27°
Forecast
Wednesday, May 27, 2026
Day
30°
Feels 30
Wind
9 km/h E
Gust
14 km/h
Humidity
35%
P.O.P
20%
Night
19°
Feels 19
Wind
9 km/h E
Gust
14 km/h
Humidity
78%
P.O.P
20%
Historical Averages
May 27
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity
Historical Averages are based on data recorded from 2000 onwards.