I-55 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: Fair 69°F 2025-09-21T23:53:00-05:00 
Overnight 2025-09-22, Showers. A chance of showers and thunderstorms, then showers after 1am. Low around 65. Southeast wind around 5 mph. Chance of precipitation is 80%.Monday 2025-09-22, Showers Likely then Chance T-storms. Showers likely, with thunderstorms also possible after 10am. Cloudy, with a high near 78. Southeast wind around 8 mph becoming southwest in the afternoon. Chance of precipitation is 60%.
Monday Night 2025-09-22, Chance Showers. A chance of showers and thunderstorms between 1am and 4am, then a slight chance of showers. Increasing clouds, with a low around 66. South wind around 6 mph becoming calm in the evening. Chance of precipitation is 40%.Tuesday 2025-09-23, Chance Showers then Chance T-storms. A chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 79. Calm wind becoming south around 6 mph in the morning. Chance of precipitation is 50%.
Tuesday Night 2025-09-23, Showers Likely. Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 65. Calm wind becoming east around 5 mph after midnight. Chance of precipitation is 70%.
Wednesday 2025-09-24, Showers Likely. Showers likely, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 77. Chance of precipitation is 70%.
Wednesday Night 2025-09-24, Chance Showers. A chance of showers and thunderstorms. Mostly cloudy, with a low around 62. Chance of precipitation is 50%.
Thursday 2025-09-25, Chance Showers. A 50 percent chance of showers. Partly sunny, with a high near 75.
Thursday Night 2025-09-25, Slight Chance Showers. A 20 percent chance of showers. Partly cloudy, with a low around 59.
Friday 2025-09-26, Slight Chance Showers. A 20 percent chance of showers. Mostly sunny, with a high near 77.- Friday Night 2025-09-26, Partly Cloudy. Partly cloudy, with a low around 58.
Saturday 2025-09-27, Sunny. Sunny, with a high near 80.
Saturday Night 2025-09-27, Mostly Clear. Mostly clear, with a low around 59.- Sunday 2025-09-28, Sunny. Sunny, with a high near 81.