O'Fallon, IL
7-Day Weather Forecast
Mostly Cloudy · 76°F
Data: NOAA / NWS
Daily Forecast Breakdown
Today
Sun, May 17
Chance Showers And Thunderstorms
Night: Partly Cloudy
85°
66°
Monday
Mon, May 18
Sunny
Night: Partly Cloudy
91°
70°
Tuesday
Tue, May 19
Partly Sunny then Chance Showers And Thunderstorms
Night: Chance Showers And Thunderstorms
92°
71°
Wednesday
Wed, May 20
Chance Showers And Thunderstorms then Showers And Thunderstorms
Night: Showers And Thunderstorms
83°
61°
Thursday
Thu, May 21
Chance Showers And Thunderstorms
Night: Slight Chance Rain Showers
73°
56°
Friday
Fri, May 22
Partly Sunny then Slight Chance Showers And Thunderstorms
Night: Slight Chance Showers And Thunderstorms
75°
57°
Saturday
Sat, May 23
Slight Chance Rain Showers
81°
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