| NWS Forecast for: Marengo IL Issued by: National Weather Service Chicago, IL Last Update: 1:21 pm CDT Aug 15, 2026 |  |
This Afternoon: A 20 percent chance of showers. Partly sunny, with a high near 27. South southwest wind around 10 km/h. Tonight: A chance of showers and thunderstorms before 1am, then showers likely and possibly a thunderstorm between 1am and 3am, then a chance of showers and thunderstorms after 3am. Mostly cloudy, with a low around 22. South southwest wind 5 to 10 km/h. Chance of precipitation is 60%. New rainfall amounts between 2.5 and 5 mm possible. Sunday: A chance of showers and thunderstorms before 8am, then a slight chance of showers between 8am and 9am. Partly sunny, with a high near 29. West northwest wind 10 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 17. North wind 10 to 15 km/h. Monday: Sunny, with a high near 26. Northwest wind 5 to 10 km/h. Monday Night: Mostly clear, with a low around 16. Tuesday: A 30 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 27. Tuesday Night: A chance of showers and thunderstorms, then showers after 1am. Mostly cloudy, with a low around 17. Wednesday: A chance of showers before 1pm. Mostly cloudy, with a high near 24. Wednesday Night: Partly cloudy, with a low around 13. Thursday: Mostly sunny, with a high near 24. Thursday Night: Partly cloudy, with a low around 13. Friday: Mostly sunny, with a high near 24. | |
| Marengo IL 42.24°N 88.62°W | |
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