| NWS Forecast for: Oak Forest IL Issued by: National Weather Service Chicago, IL Last Update: 10:06 am CDT May 18, 2026 | |
Today: Showers and thunderstorms before 2pm, then a slight chance of showers between 2pm and 3pm. High near 27. South southwest wind 25 to 30 km/h, with gusts as high as 50 km/h. Chance of precipitation is 90%. New rainfall amounts between 2.5 and 5 mm possible. Tonight: A 40 percent chance of showers and thunderstorms, mainly after 4am. Mostly cloudy, with a low around 20. South southwest wind around 25 km/h, with gusts as high as 45 km/h. Tuesday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 27. Breezy, with a south southwest wind 25 to 35 km/h, with gusts as high as 50 km/h. Chance of precipitation is 70%. New rainfall amounts between 1 and 2.5 mm, except higher amounts possible in thunderstorms. Tuesday Night: A 20 percent chance of showers before 1am. Mostly cloudy, with a low around 11. West northwest wind 15 to 25 km/h becoming north after midnight. Winds could gust as high as 35 km/h. Wednesday: Mostly sunny, with a high near 16. North northeast wind 20 to 25 km/h, with gusts as high as 35 km/h. Wednesday Night: Partly cloudy, with a low around 7. Thursday: Mostly sunny, with a high near 18. Thursday Night: Mostly cloudy, with a low around 9. Friday: A chance of showers before 1pm. Mostly cloudy, with a high near 21. Friday Night: A chance of showers. Mostly cloudy, with a low around 12. Saturday: Partly sunny, with a high near 24. Saturday Night: Partly cloudy, with a low around 13. Sunday: Mostly sunny, with a high near 27. | |
| Oak Forest IL 41.6°N 87.75°W | |
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