Cos Cob, CT Weather Forecast
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Cos Cob Weather Forecast
| TODAY | TONIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT |
| Mostly Sunny | Mostly Clear | Partly Sunny | Chance of T-Storm | Chance of T-Storm | Partly Cloudy | Sunny | Mostly Clear | Sunny | Partly Cloudy | Sunny | Partly Cloudy |
| Hi: 79°FHi: 26°C | Lo: 59°FLo: 15°C | Hi: 79°FHi: 26°C | Lo: 65°FLo: 18°C | Hi: 80°FHi: 27°C | Lo: 61°FLo: 16°C | Hi: 75°FHi: 24°C | Lo: 55°FLo: 13°C | Hi: 75°FHi: 24°C | Lo: 61°FLo: 16°C | Hi: 80°FHi: 27°C | Lo: 61°FLo: 16°C |
| POP: 90% | POP: 90% |
POP = Probability of Precipitation.
Weather Outlook Updated: 234 AM EDT Fri Sep 11 2026 

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Issued: 129 AM EDT Fri Sep 11 2026
Key Messages
1) Apparent temperatures will become pleasant Friday into Saturday.
2) A period of showers and isolated thunderstorms expected late Saturday night into Sunday morning. Locally heavy rainfall is possible, but impacts, if any, appear limited at this time.
3) Dry and seasonable conditions early next week.
Discussion
... .KEY MESSAGE 1... The cold front passes through dry tonight, but there may be a brief increase in clouds as a wave passes well to the south. Clouds quickly decrease Friday m...
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