I-255 IL weather conditions near Collinsville, Illinois
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Seasoned Weather Conditions
Current Weather Conditions
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7 day weather forecast
Current condition: A Few Clouds 92°F 2025-06-21T12:53:00-05:00 
This Afternoon 2025-06-21, Hot. Sunny and hot, with a high near 97. Heat index values as high as 108. South wind around 15 mph, with gusts as high as 22 mph.
Tonight 2025-06-21, Clear. Clear, with a low around 76. South wind 6 to 13 mph, with gusts as high as 21 mph.- Sunday 2025-06-22, Hot. Sunny and hot, with a high near 97. Heat index values as high as 104. South wind 8 to 13 mph.
Sunday Night 2025-06-22, Mostly Clear. Mostly clear, with a low around 76. South wind 6 to 10 mph.- Monday 2025-06-23, Sunny. Sunny, with a high near 96. South wind 5 to 9 mph.
Monday Night 2025-06-23, Partly Cloudy. Partly cloudy, with a low around 77.
Tuesday 2025-06-24, Slight Chance T-storms. A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 94.- Tuesday Night 2025-06-24, Partly Cloudy. Partly cloudy, with a low around 75.
Wednesday 2025-06-25, Sunny then Slight Chance T-storms. A 20 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 94.
- Wednesday Night 2025-06-25, Mostly Clear. Mostly clear, with a low around 76.
Thursday Night 2025-06-26, Slight Chance T-storms. A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 75.Friday 2025-06-27, Slight Chance T-storms then Chance Showers. A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 91.