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: Partly Cloudy 70°F 2025-09-20T10:35:00-05:00 
Today 2025-09-20, Scattered T-storms. Scattered showers and thunderstorms, mainly between 11am and 5pm. Mostly cloudy, with a high near 81. Southwest wind around 5 mph. Chance of precipitation is 50%.Tonight 2025-09-20, Scattered T-storms then Chance Showers. Scattered showers and thunderstorms. Mostly cloudy, with a low around 62. Southeast wind around 5 mph. Chance of precipitation is 50%.
Sunday 2025-09-21, Chance Showers then Chance T-storms. A chance of showers, with thunderstorms also possible after 10am. Mostly cloudy, with a high near 80. South southeast wind 5 to 10 mph becoming southwest in the afternoon. Chance of precipitation is 40%.
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. South southwest wind around 5 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 southwest wind around 5 mph, with gusts as high as 15 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.