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10 day weather forecast for O'Fallon

Saturday, April 4th, 2026, at 08:58 PM
today
Moderate rain
17° 6°
tomorrow
Sunny
18° 2°
Monday
Partly cloudy
13° 5°
Tuesday
Cloudy
10° 3°
Wednesday
Sunny
22° 6°
Thursday
Patchy rain possible
22° 12°
Friday
Cloudy
25° 15°
 More Details See
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O'Fallon Weather Pages

O'Fallon weather forecast

The weather forecast for O'Fallon over the next 3 days indicates chilly conditions with temperatures ranging from 13 °F to 18 °F.

Heavy rain is expected on Saturday.

Wind speeds are expected to be strong, averaging around 28 km/h.

On Tuesday, a notable cooling trend with temperatures reaching 10°C.

Weather today
O'Fallon weather forecast

O'Fallon 14 days weather forecast

This weeks weather in O'Fallon. Click on a date for detailed forecasts
Sat. 4
17°
6°
Moderate rain
13.1 mm
Sun. 5
18°
2°
Sunny
0 mm
Mon. 6
13°
5°
Partly cloudy
0 mm
Tue. 7
10°
3°
Cloudy
0 mm
Wed. 8
22°
6°
Sunny
0 mm
Thu. 9
22°
12°
Patchy rain possible
0.1 mm
Fri. 10
25°
15°
Cloudy
0 mm
Sat. 11
22°
16°
Moderate rain
5.5 mm
Sun. 12
18°
11°
Heavy rain
22.2 mm
Mon. 13
12°
8°
Moderate rain
12.4 mm
Tue. 14
15°
8°
Patchy rain possible
0.8 mm
Wed. 15
18°
7°
Sunny
0 mm
Thu. 16
25°
10°
Sunny
0 mm
Fri. 17
25°
13°
Patchy rain possible
4 mm
Select a date

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Access O'Fallon weather forecasts with a simple click. Select any date for comprehensive insights on temperature, rainfall, and wind conditions.
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Rain Forecast for the Next 14 Days in O'Fallon

The chart displays the expected rainfall values (in mm) over the next 14 days in O'Fallon, highlighting variations in precipitation levels for specific dates. ☔

O'Fallon Wind Speed Forecast Chart

This chart illustrates the projected daily max wind speed (in km) in O'Fallon over the next two weeks, providing insights into periods of increased or decreased wind activity. 🌀

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Location coordinates Where is O'Fallon?

Get accurate weather forecasts for O'Fallon, located at latitude 38.811 and longitude -90.7. Stay updated with localized weather information tailored for O'Fallon.

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