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Katonah Weather Forecast
| TONIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY |
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| Mostly Cloudy | Mostly Cloudy | Chance of Rain | Rain | Rain | Rain | Showers | Chance of Showers | Mostly Cloudy | Mostly Sunny | Partly Cloudy | Mostly Sunny |
| Lo: 51°FLo: 11°C | Hi: 69°FHi: 21°C | Lo: 55°FLo: 13°C | Hi: 65°FHi: 18°C | Lo: 55°FLo: 13°C | Hi: 65°FHi: 18°C | Lo: 55°FLo: 13°C | Hi: 69°FHi: 21°C | Lo: 55°FLo: 13°C | Hi: 71°FHi: 22°C | Lo: 55°FLo: 13°C | Hi: 71°FHi: 22°C |
| POP: 50% | POP: 80% | POP: 80% | POP: 80% | POP: 70% | POP: 50% |
POP = Probability of Precipitation.
Weather Outlook Updated: 448 PM EDT Thu Sep 24 2026 
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Issued: 635 PM EDT Thu Sep 24 2026
Key Messages
1) An early season nor`easter will bring a prolonged period of gusty winds and rainfall. A Wind Advisory has been issued.
2) Coastal flooding impacts expected through early weekend. Greatest impacts expected Friday through Saturday.
3) High surf and rip current risk through at least Saturday.
Discussion
... .KEY MESSAGE 1... An early season nor`easter will bring a prolonged period of gusty winds and rainfall.
Current surface analysis shows a weak low beginning to develop off the mid Atlan...