Monthly Historical AveragesCrystal Lake, IL
Average Temperature
High
21°
Feels 21
Low
9°
Feels 8
Average Precipitation
13 Days
81.5mm
0cm
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Daily Historical Averages
S
M
T
W
T
F
S
ForecastSaturday, May 30, 2026
Day
21°Feels 21
Wind
25 km/h E
Gust
38 km/h
Humidity
38%
P.O.P
30%
Night
12°Feels 10
Wind
22 km/h E
Gust
33 km/h
Humidity
62%
P.O.P
20%
Historical AveragesMay 30
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity