Monthly Historical AveragesMcHenry, IL
Average Temperature
High
21°
Feels 21
Low
9°
Feels 8
Average Precipitation
13 Days
71.9mm
0cm
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Daily Historical Averages
S
M
T
W
T
F
S
ForecastWednesday, May 27, 2026
Day
28°Feels 28
Wind
27 km/h W
Gust
41 km/h
Humidity
35%
P.O.P
10%
Night
13°Feels 11
Wind
23 km/h NE
Gust
35 km/h
Humidity
72%
P.O.P
40%
Rain
<1 mm
Historical AveragesMay 27
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity