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Monthly
Precipitation
Temperature
Wind
Temperature Unit Selection
°Celsius
°Fahrenheit
Monthly Historical Averages
Oconomowoc, WI
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May
Average Temperature
High
20°
Feels 20
Low
9°
Feels 7
Average Precipitation
10 Days
Rain amount
56.6mm
Snow amount
0cm
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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
17°
21
14°
22
17°
23
19°
24
22°
25
25°
26
26°
27
25°
28
22°
29
22°
30
23°
31
23°
Forecast
Wednesday, May 20, 2026
Day
17°
Feels 16
Wind
21 km/h N
Gust
35 km/h
Humidity
39%
P.O.P
20%
Night
7°
Feels 3
Wind
26 km/h E
Gust
39 km/h
Humidity
79%
P.O.P
30%
Historical Averages
May 20
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity
Historical Averages are based on data recorded from 2000 onwards.