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City of Waterloo, IllinoisWaterloo, IL 7-Day Weather Forecast
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Waterloo Weather Forecast
Waterloo, IL Weather Forecast Date: 949 PM CDT Sun Oct 25 2026
Weather forecast for Waterloo, IL
Tonight Lo: 50°F Lo: 10°C |
Tonight... Mostly cloudy. Lows around 50. Southeast winds around 5 mph this evening, becoming light and variable. |
Mon Hi: 79°FHi: 26°C Lo: 49°F Lo: 9°C |
Monday... Partly sunny. Highs in the upper 70s. Southwest winds around 5 mph. |
| Tue Hi: 75°FHi: 24°C Lo: 50°F Lo: 10°C |
Tuesday... Partly sunny in the morning, then becoming mostly cloudy. Highs in the mid 70s. South winds around 5 mph. |
Wed Hi: 79°FHi: 26°C Lo: 51°F Lo: 11°C |
Wednesday... Sunny. Highs in the upper 70s. |
| Thu Hi: 81°FHi: 27°C Lo: 55°F Lo: 13°C |
Thursday... Sunny. Highs in the lower 80s. |
Fri Hi: 80°FHi: 27°C Lo: 59°F Lo: 15°C |
Friday... Partly cloudy. Lows in the mid 50s. Highs around 80. |
Sat Hi: 75°FHi: 24°C Lo: 59°F Lo: 15°C |
Saturday... Mostly cloudy with a 50% chance of showers. Highs in the mid 70s. |
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