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Darien High School Weather Forecast
| THIS AFTERNOON | TONIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT |
 |  | |  |  |  |  | | | | | |
| Partly Sunny | Mostly Cloudy | Mostly Cloudy | Partly Cloudy | Chance of Showers | Chance of Showers | Sunny | Partly Cloudy | Mostly Sunny | Partly Cloudy | Mostly Sunny | Partly Cloudy |
| Hi: 70°FHi: 21°C | Lo: 60°FLo: 16°C | Hi: 75°FHi: 24°C | Lo: 65°FLo: 18°C | Hi: 81°FHi: 27°C | Lo: 59°FLo: 15°C | Hi: 69°FHi: 21°C | Lo: 51°FLo: 11°C | Hi: 65°FHi: 18°C | Lo: 51°FLo: 11°C | Hi: 69°FHi: 21°C | Lo: 45°FLo: 7°C |
| POP: 30% | POP: 40% |
POP = Probability of Precipitation.
Weather Outlook Updated: 228 PM EDT Wed Sep 30 2026 
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Issued: 742 PM EDT Wed Sep 30 2026
Key Messages
1) Conditions gradually warm and remain mostly dry through Friday with high pressure in place.
2) Low chance of rain Sunday night. No impacts expected.
Discussion
... .KEY MESSAGE 1... Surface high pressure will remain offshore through Friday.
A weak warm front moves across the region on Thursday resulting in some mid and high cloud cover, but conditions remain dry. Temperatures on Thursday get into the 70s.
By Friday, deep SW-W flow will allow 850mb temperatures to climb to 17-18C. This ...