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Shannon Weather Forecast
| TODAY | TONIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT |
 |  |  |  | |  |  |  |  | |  | |
| Mostly Sunny | Patchy Fog | Partly Cloudy | Mostly Clear | Partly Cloudy | Partly Cloudy | Chance of Showers | Showers Likely | Showers | Showers | Showers Likely | Chance of Showers |
| Hi: 79°FHi: 26°C | Lo: 55°FLo: 13°C | Hi: 85°FHi: 29°C | Lo: 61°FLo: 16°C | Hi: 89°FHi: 32°C | Lo: 69°FLo: 21°C | Hi: 85°FHi: 29°C | Lo: 59°FLo: 15°C | Hi: 69°FHi: 21°C | Lo: 59°FLo: 15°C | Hi: 69°FHi: 21°C | Lo: 49°FLo: 9°C |
| POP: 50% | POP: 60% | POP: 60% | POP: 60% | POP: 60% | POP: 30% |
POP = Probability of Precipitation.
Weather Outlook Updated: 620 AM EDT Tue Sep 29 2026 
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Issued: 633 AM EDT Tue Sep 29 2026
Key Messages
1) A gradual warming trend is expected this week, with rain chances returning late in the work week.
Discussion
... Key Message 1) Surface high pressure will remain centered over the ILN fa today. While some drier air is still hanging around, dewpoints have ticked up slightly higher compared to the previous days. Given this trend, combined with the mostly clear skies/calm winds with the surface high, some patchy dense fog may develop tonight, even outside of the river valleys. Areas th...