| NWS Forecast for: Chicago/Romeoville, Lewis University Airport IL Issued by: National Weather Service Chicago, IL Last Update: 1:21 pm CDT Aug 15, 2026 | |
This Afternoon: Showers likely, mainly before 2pm. Mostly cloudy, with a high near 27. West southwest wind around 15 km/h, with gusts as high as 25 km/h. Chance of precipitation is 70%. New precipitation amounts of less than 1 mm possible. Tonight: A chance of showers and thunderstorms before 1am, then showers likely and possibly a thunderstorm between 1am and 5am, then a chance of showers and thunderstorms after 5am. Mostly cloudy, with a low around 22. Southwest wind around 10 km/h. Chance of precipitation is 60%. New rainfall amounts between 7.5 mm and 1 cm possible. Sunday: A chance of showers and thunderstorms before 10am, then a slight chance of showers and thunderstorms after 1pm. Cloudy, then gradually becoming mostly sunny, with a high near 29. West northwest wind 15 to 20 km/h, with gusts as high as 30 km/h. Chance of precipitation is 30%. Sunday Night: Partly cloudy, with a low around 19. North wind 10 to 15 km/h. Monday: Mostly sunny, with a high near 27. North wind around 10 km/h, with gusts as high as 20 km/h. Monday Night: Mostly clear, with a low around 17. Tuesday: Mostly sunny, with a high near 27. Tuesday Night: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 19. Wednesday: A chance of showers before 1pm. Mostly cloudy, with a high near 25. Wednesday Night: Partly cloudy, with a low around 15. Thursday: Mostly sunny, with a high near 24. Thursday Night: Mostly cloudy, with a low around 15. Friday: Mostly sunny, with a high near 24. | |
| Chicago/Romeoville, Lewis University Airport IL 41.61°N 88.1°W | |
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