I-64 weather conditions near O Fallon, Illinois
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Seasoned Weather Conditions
Current Weather Conditions
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7 day weather forecast
Current condition: Fair 84°F 2025-06-17T12:53:00-05:00 
This Afternoon 2025-06-17, Sunny. Sunny, with a high near 88. South wind 3 to 5 mph.Tonight 2025-06-17, Mostly Cloudy then Slight Chance T-storms. A 20 percent chance of showers and thunderstorms after 4am. Partly cloudy, with a low around 73. South wind 5 to 7 mph.
Wednesday 2025-06-18, Chance T-storms then Heavy Rain. A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 5pm. Some of the storms could produce heavy rainfall. Partly sunny, with a high near 87. Southwest wind 9 to 15 mph, with gusts as high as 24 mph. Chance of precipitation is 60%.
Wednesday Night 2025-06-18, Heavy Rain then Slight Chance T-storms. A 50 percent chance of showers and thunderstorms, mainly before 9pm. Some of the storms could produce heavy rainfall. Mostly cloudy, with a low around 68. West wind 6 to 10 mph.
- Juneteenth 2025-06-19, Sunny. Sunny, with a high near 85. Northwest wind around 6 mph.
Thursday Night 2025-06-19, Mostly Clear. Mostly clear, with a low around 67.- Friday 2025-06-20, Sunny. Sunny, with a high near 90.
- Friday Night 2025-06-20, Mostly Clear. Mostly clear, with a low around 75.
Saturday 2025-06-21, Sunny. Sunny, with a high near 95.- Saturday Night 2025-06-21, Mostly Clear. Mostly clear, with a low around 76.
- Sunday 2025-06-22, Sunny. Sunny, with a high near 95.
- Sunday Night 2025-06-22, Mostly Clear. Mostly clear, with a low around 76.
- Monday 2025-06-23, Sunny. Sunny, with a high near 94.