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: Mostly Cloudy 63°F 2025-09-21T06:55:00-05:00 Today 2025-09-21, Chance Showers then Chance T-storms. A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 81. Southeast wind 5 to 10 mph becoming southwest in the afternoon. Winds could gust as high as 15 mph.
Tonight 2025-09-21, Chance T-storms then Showers Likely. A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 64. Southwest wind around 5 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Monday 2025-09-22, Showers Likely. Showers likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 75. South southwest wind 5 to 10 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Monday Night 2025-09-22, Chance Showers. A 40 percent chance of showers. Mostly cloudy, with a low around 62. South southwest wind around 5 mph becoming calm.
Tuesday 2025-09-23, Chance Showers. A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 79. Calm wind becoming east around 5 mph in the afternoon. Chance of precipitation is 40%.
Tuesday Night 2025-09-23, Chance Showers. A chance of showers and thunderstorms. Mostly cloudy, with a low around 60. Chance of precipitation is 30%.
Wednesday 2025-09-24, Chance Showers. A 30 percent chance of showers. Mostly cloudy, with a high near 75.
Wednesday Night 2025-09-24, Chance Showers. A chance of showers. Mostly cloudy, with a low around 58.
Thursday 2025-09-25, Chance Showers. A chance of showers. Partly sunny, with a high near 74.
Thursday Night 2025-09-25, Partly Cloudy. Partly cloudy, with a low around 54.Friday 2025-09-26, Mostly Sunny then Chance Showers. A chance of showers. Mostly sunny, with a high near 74.
- Friday Night 2025-09-26, Partly Cloudy. Partly cloudy, with a low around 53.
Saturday 2025-09-27, Mostly Sunny. Mostly sunny, with a high near 76.