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 72°F 2025-06-14T08:53:00-05:00 
Today 2025-06-14, Scattered T-storms. Scattered showers and thunderstorms, mainly between noon and 5pm. Mostly cloudy, with a high near 82. North wind 6 to 9 mph. Chance of precipitation is 30%.Tonight 2025-06-14, Partly Cloudy then Patchy Fog. Patchy fog after 3am. Otherwise, partly cloudy, with a low around 67. North wind 3 to 7 mph.
Sunday 2025-06-15, Patchy Fog then Mostly Sunny. Patchy fog before 8am. Otherwise, mostly sunny, with a high near 85. Northeast wind 3 to 5 mph.
Sunday Night 2025-06-15, Partly Cloudy then Slight Chance Showers. A 20 percent chance of showers after 1am. Partly cloudy, with a low around 69. Light and variable wind.
Monday 2025-06-16, Chance T-storms. A slight chance of showers, then a chance of showers and thunderstorms after 10am. Partly sunny, with a high near 83. Calm wind becoming south around 6 mph in the afternoon. Chance of precipitation is 30%.Monday Night 2025-06-16, Mostly Cloudy then Slight Chance T-storms. A slight chance of thunderstorms before 7pm, then a slight chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 70. Chance of precipitation is 20%.
Tuesday 2025-06-17, Chance T-storms. A 30 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 88.
Tuesday Night 2025-06-17, Slight Chance T-storms. A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 73.Wednesday 2025-06-18, Chance Showers then Showers Likely. A chance of showers, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 89. Chance of precipitation is 60%.
Wednesday Night 2025-06-18, Chance T-storms. A 50 percent chance of showers and thunderstorms, mainly before 1am. Mostly cloudy, with a low around 72.
Juneteenth 2025-06-19, Slight Chance T-storms. A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 88.
Thursday Night 2025-06-19, Mostly Clear. Mostly clear, with a low around 70.
Friday 2025-06-20, Sunny. Sunny, with a high near 89.