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7 Days
14 Days
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Monthly
Precipitation
Temperature
Wind
Temperature Unit Selection
°Celsius
°Fahrenheit
Monthly Historical Averages
Waterloo, IA
Content continues below
May
Average Temperature
High
22°
Feels 22
Low
10°
Feels 9
Average Precipitation
12 Days
Rain amount
125.7mm
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
27°
17
27°
18
22°
19
19°
20
16°
21
18°
22
21°
23
21°
24
22°
25
23°
26
24°
27
24°
28
24°
29
24°
30
25°
31
Forecast
Saturday, May 16, 2026
Day
27°
Feels 27
Wind
21 km/h NE
Gust
32 km/h
Humidity
39%
P.O.P
20%
Night
17°
Feels 15
Wind
37 km/h SE
Gust
56 km/h
Humidity
100%
P.O.P
70%
Rain
~1 mm
Historical Averages
May 16
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity
Historical Averages are based on data recorded from 2000 onwards.