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Shannon, IL Weather Forecast
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Shannon Weather Forecast
| TODAY | TONIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT |
 |  |  |  |  |  |  | | | | | |
| Mostly Sunny | Mostly Clear | Chance of T-Storm | Clearing | Chance of Showers | Chance of T-Storm | Showers | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Partly Cloudy |
| Hi: 81°FHi: 27°C | Lo: 55°FLo: 13°C | Hi: 71°FHi: 22°C | Lo: 49°FLo: 9°C | Hi: 75°FHi: 24°C | Lo: 65°FLo: 18°C | Hi: 80°FHi: 27°C | Lo: 59°FLo: 15°C | Hi: 75°FHi: 24°C | Lo: 60°FLo: 16°C | Hi: 75°FHi: 24°C | Lo: 55°FLo: 13°C |
| POP: 60% | POP: 50% | POP: 70% | POP: 70% | POP: 80% | POP: 90% | POP: 70% | POP: 40% |
POP = Probability of Precipitation.
Weather Outlook Updated: 631 AM CDT Sat Sep 12 2026 
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Issued: 622 AM CDT Sat Sep 12 2026
Key Messages
- A cold front will bring low chances (10-20%) for showers and storms early this morning with isolated storms possible (20-30%) this afternoon along and south of Highway 34.
- An active pattern is in store next week with multiple rounds of showers and storms likely through Friday. Currently, the greatest severe potential is Monday afternoon and evening where there is a Marginal Risk, Level 1 out of 5, for eastern IA and northwest IL.
Aviation
/12Z TAFS THROUGH 12Z SUNDAY/... Issued at 621 ...