Cottonwood Lake Weather Forecast
- 35
- 47
Partly Sunny
- 33
- 58
Mostly Cloudy
- 38
- 63
Partly Sunny
- 43
- 62
Partly Sunny
- 25
- 61
Mostly Cloudy
- 24
- 38
Partly Sunny
- 26
- 48
Mostly Cloudy
Today 17 Mar McHenry
Mostly sunny. Not as cold. Highs in the lower 40s. Southwest Winds around 10 Mph.
Tonight 17 Mar McHenry
Increasing Clouds. Not as cold. Lows around 30. West Winds around 10 Mph.
Cottonwood Lake Temperature Statistics
March Temperature
Harvey Municipal Airport (34.8 miles)
Lowest 15 March, 2026
-2.2 °FAverage March
22.9 °FHighest 8 March, 2026
60.8 °F
Climate (2021–Present)
Harvey Municipal Airport (34.8 miles)
Average Low 2021–2026
30.3 °FAverage 2021–2026
41.3 °FAverage High 2021–2026
52 °F