I-55 weather conditions near Pontiac, Illinois
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Seasoned Weather Conditions
Current Weather Conditions
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7 day weather forecast
Current condition: Fair 79°F 2025-09-20T12:35:00-05:00 
This Afternoon 2025-09-20, Scattered T-storms. Scattered showers and thunderstorms, mainly before 5pm. Mostly cloudy, with a high near 81. South southwest wind around 5 mph. Chance of precipitation is 50%.
Tonight 2025-09-20, Chance T-storms. A 40 percent chance of showers and thunderstorms, mainly after 10pm. Mostly cloudy, with a low around 63. Northeast wind around 5 mph becoming southeast after midnight.Sunday 2025-09-21, Chance Showers then Chance T-storms. A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 81. Southeast wind 5 to 10 mph becoming west southwest in the afternoon.
Sunday Night 2025-09-21, Chance Showers. A chance of showers and thunderstorms before 10pm, then a chance of showers between 10pm and 1am, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 61. West wind around 5 mph becoming south southwest after midnight. Winds could gust as high as 10 mph. Chance of precipitation is 50%.Monday 2025-09-22, Chance Showers then Chance T-storms. A chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 79. South wind 5 to 10 mph. Chance of precipitation is 50%.
- Monday Night 2025-09-22, Chance Showers. A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 60.
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. Chance of precipitation is 50%.
Tuesday Night 2025-09-23, Chance T-storms. A chance of showers and thunderstorms. Mostly cloudy, with a low around 60.
Wednesday 2025-09-24, Chance Showers. A chance of showers. Mostly cloudy, with a high near 74.
Wednesday Night 2025-09-24, Chance Showers. A chance of showers. Mostly cloudy, with a low around 57.- Thursday 2025-09-25, Chance Showers. A chance of showers. Partly sunny, with a high near 73.
- Thursday Night 2025-09-25, Chance Showers. A chance of showers. Mostly cloudy, with a low around 54.
Friday 2025-09-26, Chance Showers. A chance of showers. Mostly sunny, with a high near 73.