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Town of New Castle, NYChappaqua, NY Weather Forecast
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Chappaqua Weather Forecast
| TONIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | COLUMBUS DAY |
 |  | | | | | | |  | |  |  |
| Clear | Sunny | Mostly Clear | Sunny | Mostly Clear | Sunny | Mostly Clear | Sunny | Partly Cloudy | Mostly Sunny | Chance of Showers | Chance of Showers |
| Lo: 39°FLo: 4°C | Hi: 65°FHi: 18°C | Lo: 51°FLo: 11°C | Hi: 71°FHi: 22°C | Lo: 50°FLo: 10°C | Hi: 69°FHi: 21°C | Lo: 49°FLo: 9°C | Hi: 69°FHi: 21°C | Lo: 51°FLo: 11°C | Hi: 70°FHi: 21°C | Lo: 55°FLo: 13°C | Hi: 69°FHi: 21°C |
| POP: 50% | POP: 50% |
POP = Probability of Precipitation.
Weather Outlook Updated: 537 PM EDT Tue Oct 06 2026 
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Issued: 1043 PM EDT Tue Oct 6 2026
Key Messages
1) Coldest night of the season thus far coming up for tonight. Frost, isolated freezing temperatures for late tonight into early Wednesday morning for parts of the region.
2) Temperatures rebound with air mass moderation Wednesday into Thursday. Above normal temperatures forecast Thursday.
3) Next chance of rain Sunday night into early next week.
Discussion
... .KEY MESSAGE 1... Good radiational cooling tngt with high pres building over the area. The 12Z MET and MAV were blended in with ...