Climate almanac
McHenry
Illinois, United States · 42.33°, -88.27°
What is the weather like in McHenry in October?
In October, McHenry is typically 63°F (17°C) during the day and 47°F (8°C) at night. The month brings about 3.7 in (95 mm) of precipitation in total. Snowfall averages about 0.6 in (16 mm) over the month.
- Average high63°F (17°C)
- Average low47°F (8°C)
- Precipitation3.7 in (95 mm)
- Clear or mostly clear days11
- Snowfall0.6 in (16 mm)
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)