Weather forecast for 10 days
O'Fallon, IL

On Saturday, in O'Fallon, predominantly clouded weather is expected.
The temperature is anticipated to vary between a chilly 48.2°F (9°C) and a subzero 26.6°F (-3°C).
It will be warmer, and the highest temperature of 48.2°F (9°C) on Saturday will be more in line with December's average maximum of 42.6°F (5.9°C) than January's of 37.8°F (3.2°C).
Sunrise will be at 7:08 am and sunset at 5:15 pm; the daylight will last for 10h and 7min.

On Sunday, January 26, predominantly clouded weather is expected.
The highest temperature will be an icy 37.4°F (3°C), while the lowest predicted temperature is a subzero 21.2°F (-6°C).
The highest temperature will be in line with January's average maximum of 37.8°F (3.2°C).
Sunrise will be at 7:08 am and sunset at 5:16 pm; the daylight will last for 10h and 8min.

For the next ten days, a combination of cloudy and sunny weather is predicted.
Rain is not forecasted in O'Fallon in the upcoming days.
Temperature differences will be considerable in the upcoming days. The maximum temperature will vary between 28.4°F (-2°C) and 51.8°F (11°C), while the lowest nightly temperature fluctuation will be also considerable, as the lowest temperature will be between 6.8°F (-14°C) and 33.8°F (1°C).
The warmest day will be next Wednesday, with a maximum of 51.8°F (11°C); with the highest temperature of 28.4°F (-2°C), Thursday will be the coldest day.

---

The coldest month in O'Fallon is January, with an average high-temperature of 37.8°F (3.2°C) and an average low-temperature of 24.6°F (-4.1°C).