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City of Ottawa, ILOttawa, IL 7-Day Weather Forecast
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Ottawa Weather Forecast
Ottawa, IL Weather Forecast Date: 1226 PM CST Tue Nov 10 2026
Weather forecast for Ottawa, IL
Today Hi: 65°FHi: 18°C Lo: 41°F Lo: 5°C |
This Afternoon... Sunny. Highs in the mid 60s. Northwest winds around 5 mph. |
Veterans Day Hi: 55°FHi: 13°C Lo: 35°F Lo: 2°C |
Veterans Day... Mostly cloudy. A slight chance of rain early in the morning, then a chance of rain in the late morning and early afternoon. Highs in the mid 50s. Southeast winds around 5 mph, increasing to north 10 to 15 mph in the afternoon. Chance of precipitation 40%. |
Thu Hi: 45°FHi: 7°C Lo: 29°F Lo: -2°C |
Thursday... Mostly cloudy. Highs in the mid 40s. North winds 10 to 15 mph with gusts up to 25 mph. |
Fri Hi: 41°FHi: 5°C Lo: 25°F Lo: -4°C |
Friday... Mostly sunny in the morning, then becoming partly cloudy. Highs in the lower 40s. |
| Sat Hi: 45°FHi: 7°C Lo: 29°F Lo: -2°C |
Saturday... Sunny. Highs in the mid 40s. |
| Sun Hi: 49°FHi: 9°C Lo: 31°F Lo: -1°C |
Sunday... Mostly sunny in the morning, then becoming partly cloudy. Highs in the upper 40s. |
| Mon Hi: 51°FHi: 11°C |
Monday... Partly cloudy. Highs in the lower 50s. |
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