Monthly Historical AveragesOntario, WI
Average Temperature
High
21°
Feels 21
Low
8°
Feels 7
Average Precipitation
11 Days
62.1mm
0.1cm
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Daily Historical Averages
S
M
T
W
T
F
S
ForecastThursday, May 21, 2026
Day
13°Feels 11
Wind
23 km/h E
Gust
35 km/h
Humidity
47%
P.O.P
30%
Night
9°Feels 6
Wind
19 km/h E
Gust
29 km/h
Humidity
62%
P.O.P
30%
Historical AveragesMay 21
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity