Illinois Beach State Park Weather Forecast
- 40
- 46
Mostly Sunny
- 51
- 67
Rain Showers
- 32
- 64
Chance Rain Showers
- 31
- 42
Partly Sunny
- 40
- 54
Partly Sunny
- 43
- 65
Chance Rain Showers
- 31
- 58
Rain Showers Likely
Today 13 Mar Lake
Mostly sunny. Highs in the upper 50s Inland, but only in the mid 40s near the lake. East Winds 5 to 10 Mph. Gusts up to 20 Mph in the afternoon.
Tonight 13 Mar Lake
Mostly clear in the Evening, then becoming partly cloudy. Lows in the lower 40s. East Winds 5 to 10 Mph in the Evening, becoming southeast after midnight.
Illinois Beach State Park Temperature Statistics
March Temperature
Chicago/Waukegan Regional Airport (2.5 miles)
Lowest 2 March, 2025
13.7 °FAverage March
39 °FHighest 10 March, 2025
69.1 °F
Climate (2020–Present)
Chicago/Waukegan Regional Airport (2.5 miles)
Average Low 2020–2025
42.2 °FAverage 2020–2025
50.8 °FAverage High 2020–2025
59.2 °F