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City of Marengo, ILMarengo, IL Weather Forecast
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Marengo Weather Forecast
| TONIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY |
 |  |  | | | |  |  | | |  |  |
| Showers | Showers Likely | Chance of Showers | Chance of Showers | Chance of Showers | Chance of Showers | Partly Cloudy | Partly Cloudy | Partly Cloudy | Partly Cloudy | Mostly Clear | Mostly Sunny |
| Lo: 59°FLo: 15°C | Hi: 61°FHi: 16°C | Lo: 49°FLo: 9°C | Hi: 55°FHi: 13°C | Lo: 41°FLo: 5°C | Hi: 51°FHi: 11°C | Lo: 35°FLo: 2°C | Hi: 51°FHi: 11°C | Lo: 31°FLo: -1°C | Hi: 59°FHi: 15°C | Lo: 35°FLo: 2°C | Hi: 60°FHi: 16°C |
| POP: 90% | POP: 60% | POP: 30% | POP: 50% | POP: 50% | POP: 20% |
POP = Probability of Precipitation.
Weather Outlook Updated: 605 PM CST Tue Nov 03 2026 
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Issued: 558 PM CST Tue Nov 3 2026
Key Messages
- Waves of showers will continue through tonight, with a soaking rainfall expected over much of the area before tapering off Wednesday morning.
- A return to more seasonable temperatures is expected late this week into the upcoming weekend.
Discussion
... Issued at 118 PM CST Tue Nov 3 2026
Early this afternoon, a deep, negatively tilted trough axis extends down the spine of the Plains. Along its leeward side, we find a couple of distinct areas of low pressure, most notably one currently li...