Historical Weather Records & Monthly Climate for Crystal Lake, IL
All-Time High
100°F
All-Time Low
-32°F
Max Daily Snow
7.8"
Max Daily Rain
3.41"
Max Snow Depth
16"
Monthly Climate Averages for Crystal Lake, IL
Based on 30 years of historical data (1994 - 2023)
| Month | High (°F) | Low (°F) | Precip (in) | Snow (in) |
|---|---|---|---|---|
| January | 29° | 15° | 2" | 8.27" |
| February | 33° | 17° | 2.02" | 7.03" |
| March | 45° | 28° | 2.47" | 4.05" |
| April | 57° | 39° | 3.97" | 2.09" |
| May | 68° | 50° | 4.4" | 0.02" |
| June | 78° | 61° | 3.76" | 0 |
| July | 81° | 66° | 3.51" | 0 |
| August | 80° | 65° | 3.67" | 0 |
| September | 73° | 58° | 2.83" | 0 |
| October | 60° | 46° | 3.13" | 0.21" |
| November | 46° | 34° | 2.14" | 2.02" |
| December | 35° | 22° | 2.23" | 6.71" |
More Historical Climate Data for Cities in
IL