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: Overcast 31°F 2025-12-11T00:53:00-06:00 
Overnight 2025-12-11, Mostly Cloudy. Mostly cloudy, with a low around 25. Northwest wind 5 to 8 mph.Thursday 2025-12-11, Mostly Cloudy then Slight Chance Snow. A 20 percent chance of snow after 5pm. Mostly cloudy, with a high near 34. Light and variable wind becoming southeast 5 to 8 mph in the morning.
Thursday Night 2025-12-11, Slight Chance Snow then Mostly Cloudy. A 20 percent chance of snow before 9pm. Mostly cloudy, with a low around 33. Southeast wind 6 to 8 mph becoming northwest after midnight.
Friday 2025-12-12, Partly Sunny. Partly sunny, with a high near 40. Northwest wind 8 to 13 mph, with gusts as high as 20 mph.- Friday Night 2025-12-12, Mostly Cloudy. Mostly cloudy, with a low around 21. Northwest wind 6 to 8 mph.
- Saturday Night 2025-12-13, Mostly Cloudy. Mostly cloudy, with a low around 5.
Sunday 2025-12-14, Cold. Sunny and cold, with a high near 18.
Sunday Night 2025-12-14, Mostly Clear. Mostly clear, with a low around 9.
Monday 2025-12-15, Sunny. Sunny, with a high near 38.- Monday Night 2025-12-15, Mostly Cloudy. Mostly cloudy, with a low around 25.
- Tuesday 2025-12-16, Partly Sunny. Partly sunny, with a high near 44.
- Tuesday Night 2025-12-16, Mostly Cloudy. Mostly cloudy, with a low around 35.
Wednesday 2025-12-17, Mostly Cloudy then Slight Chance Rain. A 20 percent chance of rain. Mostly cloudy, with a high near 51.