Climate almanac
Jacksonville
Illinois, United States · 39.73°, -90.23°
What is the weather like in Jacksonville in October?
In October, Jacksonville is typically 69°F (20°C) during the day and 49°F (9°C) at night. The month brings about 3.3 in (84 mm) of precipitation in total. Snowfall averages about 0.2 in (6 mm) over the month.
- Average high69°F (20°C)
- Average low49°F (9°C)
- Precipitation3.3 in (84 mm)
- Clear or mostly clear days14
- Snowfall0.2 in (6 mm)
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)