| NWS Forecast for: Marengo IL Issued by: National Weather Service Chicago, IL Last Update: 2:46 pm CDT Aug 17, 2026 | |
| Tonight: Mostly clear, with a low around 15. Northwest wind 5 to 10 km/h becoming calm in the evening. Tuesday: A 50 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 26. West southwest wind 5 to 10 km/h increasing to 15 to 20 km/h in the afternoon. Winds could gust as high as 35 km/h. Tuesday Night: Showers likely and possibly a thunderstorm before 1am, then a slight chance of showers. Mostly cloudy, with a low around 17. West northwest wind 5 to 10 km/h, with gusts as high as 20 km/h. Chance of precipitation is 60%. New rainfall amounts between 2.5 and 5 mm possible. Wednesday: Mostly sunny, with a high near 26. Calm wind. Wednesday Night: Partly cloudy, with a low around 14. Calm wind. Thursday: Sunny, with a high near 26. Thursday Night: A 20 percent chance of showers after 1am. Mostly clear, with a low around 14. Friday: A chance of showers after 1pm. Mostly sunny, with a high near 26. Friday Night: A chance of showers. Partly cloudy, with a low around 16. Saturday: Mostly sunny, with a high near 24. Saturday Night: Mostly clear, with a low around 13. Sunday: Mostly sunny, with a high near 23. Sunday Night: Partly cloudy, with a low around 13. Monday: Mostly sunny, with a high near 24. | |
| Marengo IL 42.24°N 88.62°W | |
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