I-255 IL weather conditions near collinsville-illinois Weather, Illinois
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7 day weather forecast
Current condition: Overcast 78°F 2025-07-31T01:53:00-05:00 
Overnight 2025-07-31, Slight Chance T-storms. A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 71. North wind around 6 mph.
Thursday 2025-07-31, Chance Showers. A chance of showers and thunderstorms. Cloudy, with a high near 79. North wind 7 to 14 mph. Chance of precipitation is 50%.Thursday Night 2025-07-31, Slight Chance Showers then Mostly Cloudy. A 20 percent chance of showers before 10pm. Mostly cloudy, with a low around 65. North wind 8 to 10 mph.
Friday 2025-08-01, Mostly Sunny. Mostly sunny, with a high near 80. Northeast wind 8 to 11 mph.
Friday Night 2025-08-01, Partly Cloudy. Partly cloudy, with a low around 60. Northeast wind 6 to 10 mph.
Saturday 2025-08-02, Sunny. Sunny, with a high near 80.- Saturday Night 2025-08-02, Partly Cloudy. Partly cloudy, with a low around 61.
- Sunday 2025-08-03, Sunny. Sunny, with a high near 83.
- Sunday Night 2025-08-03, Partly Cloudy. Partly cloudy, with a low around 65.
Monday 2025-08-04, Partly Sunny then Slight Chance T-storms. A 20 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 84.
Monday Night 2025-08-04, Slight Chance T-storms. A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 68.
Tuesday 2025-08-05, Slight Chance T-storms. A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 86.- Tuesday Night 2025-08-05, Slight Chance T-storms. A 20 percent chance of showers and thunderstorms. Mostly clear, with a low around 69.
- Wednesday 2025-08-06, Mostly Sunny. Mostly sunny, with a high near 88.