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City of Marengo, ILMarengo, IL 7-Day Weather Forecast
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Marengo Weather Forecast
Marengo, IL Weather Forecast Date: 631 AM CDT Tue Sep 15 2026
Weather forecast for Marengo, IL
Today Hi: 79°FHi: 26°C Lo: 59°F Lo: 15°C |
Today... A slight chance of thunderstorms early in the morning. Showers in the morning, then a slight chance of showers and thunderstorms in the afternoon. Highs in the upper 70s. Southwest winds 10 to 15 mph, becoming west 5 to 10 mph in the afternoon. Chance of precipitation near 100%. |
Wed Hi: 71°FHi: 22°C Lo: 61°F Lo: 16°C |
Wednesday... Mostly cloudy. A chance of showers. Highs in the lower 70s. Northeast winds 5 to 10 mph. Chance of precipitation 30%. |
| Thu Hi: 75°FHi: 24°C Lo: 60°F Lo: 16°C |
Thursday... Mostly cloudy. A chance of showers with a slight chance of thunderstorms in the morning. Humid with highs in the mid 70s. North winds around 5 mph. Chance of precipitation 50%. |
| Fri Hi: 75°FHi: 24°C Lo: 61°F Lo: 16°C |
Friday... Mostly cloudy with a 50% chance of showers. Highs in the mid 70s. |
| Sat Hi: 79°FHi: 26°C Lo: 60°F Lo: 16°C |
Saturday... Mostly cloudy. A chance of showers in the morning, then showers likely with a chance of thunderstorms in the afternoon. Highs in the upper 70s. Chance of precipitation 70%. |
| Sun Hi: 71°FHi: 22°C Lo: 55°F Lo: 13°C |
Sunday... Mostly cloudy with a chance of showers. Highs in the lower 70s. Chance of precipitation 30%. |
Mon Hi: 69°FHi: 21°C |
Monday... Mostly cloudy in the morning, then becoming partly cloudy. Highs in the upper 60s. |
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