Weather WorldWatertown, IL Weather Forecast
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| THIS AFTERNOON | TONIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT |
 |  | | |  |  | | | | | | |
| Partly Cloudy | Partly Cloudy | Partly Cloudy | Partly Cloudy | Mostly Cloudy | Mostly Cloudy | Mostly Cloudy | Mostly Cloudy | Clearing | Partly Cloudy | Partly Cloudy | Partly Cloudy |
| Hi: 71°FHi: 22°C | Lo: 49°FLo: 9°C | Hi: 75°FHi: 24°C | Lo: 49°FLo: 9°C | Hi: 69°FHi: 21°C | Lo: 45°FLo: 7°C | Hi: 71°FHi: 22°C | Lo: 51°FLo: 11°C | Hi: 75°FHi: 24°C | Lo: 55°FLo: 13°C | Hi: 75°FHi: 24°C | Lo: 51°FLo: 11°C |
POP = Probability of Precipitation.
Weather Outlook Updated: 121 PM CDT Sat Oct 24 2026 
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Issued: 225 PM CDT Sat Oct 24 2026
Key Messages
- Generally well above normal temperatures will continue, albeit with a modest cool-down on Monday near and north of I-80, and particularly near Lake Michigan.
- There are periodic low/uncertain rain chances in the mid to late workweek period, with the best chance of any meaningful rainfall not until next Saturday (Halloween) night.
Discussion
... Issued at 225 PM CDT Sat Oct 24 2026
Tonight through Sunday:
Following a calm, cool, and partly cloudy night tonight (relative to this afternoon`s...