Crystal Lake Weather Forecast
- 47
- 55
Rain Showers Likely
- 42
- 59
Partly Sunny
- 47
- 65
Partly Sunny
- 50
- 62
Chance Rain Showers
- 53
- 66
Chance Rain Showers
- 55
- 63
Chance Rain Showers
Today 21 Sep Hancock
Showers likely. Patchy fog. A slight chance of Thunderstorms this afternoon. Highs in the mid 50s. Northeast Winds 5 to 10 Mph with Gusts up to 20 Mph. Chance of rain 70 percent.
Tonight 21 Sep Hancock
Mostly cloudy. A chance of drizzle in the evening. Patchy fog in the evening. Lows in the upper 40s. Northeast Winds 5 to 10 Mph.
Crystal Lake Temperature Statistics
September Temperature
Forest City Municipal Airport (8.1 miles)
Lowest 13 September, 2026
44.6 °FAverage September
67.3 °FHighest 4 September, 2026
89.6 °F
Climate (2021–2026)
Forest City Municipal Airport (8.1 miles)
Average Low 2021–2026
36.6 °FAverage 2021–2026
47.1 °FAverage High 2021–2026
57.3 °F