5-Day Weather Forecast, O'Fallon (IL)

Thu   Dec 26

13°C | 6°C

SE 4 m/s

1.9 mm

broken clouds and chance of rain

hourly forecast

Fri   Dec 27

14°C | 8°C

SE 5 m/s

4.6 mm

overcast and rain

hourly forecast

Sat   Dec 28

16°C | 7°C

SW 3 m/s

broken clouds and no rain

hourly forecast

Sun   Dec 29

13°C | 5°C

W 5 m/s

broken clouds and no rain

Mon   Dec 30

13°C | 4°C

E 6 m/s

6.9 mm

broken clouds and rain

See the 10-day forecast for popular European destinations

Europe Forecast

Get more details in the extended 10 day weather forecast for O'Fallon. Check out our December climate page to see if the current temperatures in O'Fallon is typical for this time of year.