Saybrook, IL Weather Forecast
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Saybrook Weather Forecast
| TONIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT |
| Chance of Showers | Chance of T-Storm | Clearing | Sunny | Partly Cloudy | Partly Cloudy | Partly Cloudy | Mostly Cloudy | Mostly Sunny | Chance of Showers | Partly Sunny | Chance of Showers |
| Lo: 69°FLo: 21°C | Hi: 79°FHi: 26°C | Lo: 59°FLo: 15°C | Hi: 80°FHi: 27°C | Lo: 61°FLo: 16°C | Hi: 85°FHi: 29°C Lo: 65°FLo: 18°C | Hi: 85°FHi: 29°C Lo: 65°FLo: 18°C | Lo: 69°FLo: 21°C | Hi: 89°FHi: 32°C | Lo: 70°FLo: 21°C | Hi: 85°FHi: 29°C | Hi: 81°FHi: 27°C Lo: 61°FLo: 16°C |
| POP: 20% | POP: 50% | POP: 40% | POP: 40% |
POP = Probability of Precipitation.
Weather Outlook Updated: 612 PM CDT Wed Sep 09 2026 

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Issued: 636 PM CDT Wed Sep 9 2026
Key Messages
- Isolated strong to severe thunderstorms south of Interstate 70 this afternoon carry a risk of localized damaging wind gusts.
- Localized heavy rainfall tonight will yield pockets of 1 to 2 inch totals near and south of I-70, leading to potential ponding in low-lying areas.
Discussion
... Issued at 1222 PM CDT Wed Sep 9 2026
Regional radar mosaic indicates a band of showers along a confluence zone dissipating as it tracks east near I-55 early this afternoon. An outflow boundary well ahead ...
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