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Ottoville, IL Weather Forecast
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Ottoville Weather Forecast
| TODAY | TONIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY |
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| Thunderstorms | Chance of Showers | Chance of Showers | Chance of Showers | Mostly Cloudy | Partly Cloudy | Partly Cloudy | Partly Cloudy | Mostly Cloudy | Mostly Cloudy | Partly Cloudy | Partly Cloudy |
| Hi: 71°FHi: 22°C | Lo: 59°FLo: 15°C | Hi: 65°FHi: 18°C | Lo: 55°FLo: 13°C | Hi: 61°FHi: 16°C | Hi: 69°FHi: 21°C Lo: 50°FLo: 10°C | Hi: 69°FHi: 21°C Lo: 50°FLo: 10°C | Hi: 69°FHi: 21°C Lo: 50°FLo: 10°C | Hi: 70°FHi: 21°C Lo: 51°FLo: 11°C | Hi: 70°FHi: 21°C Lo: 51°FLo: 11°C | Hi: 71°FHi: 22°C Lo: 50°FLo: 10°C | Hi: 71°FHi: 22°C Lo: 50°FLo: 10°C |
| POP: 100% | POP: 20% | POP: 40% | POP: 50% |
POP = Probability of Precipitation.
Weather Outlook Updated: 312 AM CDT Sun Sep 20 2026 
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Issued: 300 AM CDT Sun Sep 20 2026
Key Messages
- Very heavy rain producing MCS continuing to affect the area through morning before moving off to the east. Then cloudy cooler and breezy conditions into Monday.
- The ongoing Flood Watch has been extended through midday Sunday for lingering rain and flooding problems.
- Scattered showers possible Monday into Tuesday, before a mid to late week break from the precip occurs. Cooler than normal high temperatures in the 60s for much of the upcoming week. Lows at night in the 40s and 50s.