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 64°F 2025-10-17T01:53:00-05:00 
Overnight 2025-10-17, Mostly Cloudy. Mostly cloudy, with a low around 59. Southeast wind around 7 mph.
Friday 2025-10-17, Partly Sunny. Partly sunny, with a high near 83. South wind 6 to 10 mph.- Friday Night 2025-10-17, Partly Cloudy. Partly cloudy, with a low around 63. South wind around 8 mph.
Saturday 2025-10-18, Showers Likely then Showers. Showers likely, then showers and possibly a thunderstorm after 10am. High near 82. Southwest wind 9 to 14 mph, with gusts as high as 21 mph. Chance of precipitation is 90%.
Saturday Night 2025-10-18, Showers. Showers and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms between 1am and 4am, then a chance of showers after 4am. Low around 51. Southwest wind 10 to 14 mph becoming west after midnight. Winds could gust as high as 23 mph. Chance of precipitation is 80%.
Sunday 2025-10-19, Sunny. Sunny, with a high near 65.
Sunday Night 2025-10-19, Clear. Clear, with a low around 44.- Monday 2025-10-20, Sunny. Sunny, with a high near 73.
Monday Night 2025-10-20, Chance Showers. A 40 percent chance of showers. Partly cloudy, with a low around 52.
Tuesday 2025-10-21, Slight Chance Showers. A 20 percent chance of showers before 1pm. Sunny, with a high near 66.
Tuesday Night 2025-10-21, Mostly Clear. Mostly clear, with a low around 42.- Wednesday 2025-10-22, Sunny. Sunny, with a high near 66.
- Wednesday Night 2025-10-22, Partly Cloudy. Partly cloudy, with a low around 46.
Thursday 2025-10-23, Mostly Sunny. Mostly sunny, with a high near 67.