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 34°F 2025-12-08T15:53:00-06:00 
Tonight 2025-12-08, Increasing Clouds. Increasing clouds, with a low around 26. Light and variable wind becoming south 5 to 10 mph in the evening.- Tuesday 2025-12-09, Mostly Sunny. Mostly sunny, with a high near 52. Southwest wind 10 to 15 mph, with gusts as high as 23 mph.
Tuesday Night 2025-12-09, Mostly Cloudy then Mostly Cloudy and Breezy. Mostly cloudy, with a low around 40. Breezy, with a south wind 17 to 22 mph becoming west after midnight. Winds could gust as high as 30 mph.
Wednesday 2025-12-10, Partly Sunny and Breezy. Partly sunny, with a high near 48. Breezy, with a northwest wind 20 to 25 mph decreasing to 14 to 19 mph in the afternoon. Winds could gust as high as 36 mph.
Wednesday Night 2025-12-10, Mostly Cloudy. Mostly cloudy, with a low around 26. Northwest wind 5 to 10 mph.Thursday 2025-12-11, Slight Chance Snow then Mostly Cloudy. A 20 percent chance of snow before noon. Mostly cloudy, with a high near 38.
Thursday Night 2025-12-11, Slight Chance Snow then Mostly Cloudy. A 20 percent chance of snow before midnight. Mostly cloudy, with a low around 27.
Friday 2025-12-12, Partly Sunny. Partly sunny, with a high near 36.- Friday Night 2025-12-12, Mostly Cloudy. Mostly cloudy, with a low around 14.
- Saturday 2025-12-13, Partly Sunny. Partly sunny, with a high near 25.
- Saturday Night 2025-12-13, Mostly Cloudy. Mostly cloudy, with a low around 14.
- Sunday 2025-12-14, Mostly Sunny. Mostly sunny, with a high near 29.
- Sunday Night 2025-12-14, Mostly Cloudy. Mostly cloudy, with a low around 20.
Monday 2025-12-15, Slight Chance Rain. A 20 percent chance of rain. Mostly cloudy, with a high near 39.