Nassau County, NY Weather Forecast

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Nassau County, NY Weather Forecast

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Nassau County NY weather  - Clear - 42°F
Clear
42°F
Updated 5:07 am
Feels Like 40°F
Humidity 59%
Wind NNW 7 mph
Barometer  30.5 in
Dew Point 29°F
Nassau County NY weather  - Clear - 6°C
Clear
6°C
Updated 5:07 am
Feels Like 4°C
Humidity 59%
Wind NNW 11 km/h
Barometer  103.3 kPa
Dew Point -2°C

Nassau County Weather Forecast

TODAY TONIGHT MONDAY MONDAY NIGHT TUESDAY TUESDAY NIGHT WEDNESDAY WEDNESDAY NIGHT THURSDAY THURSDAY NIGHT FRIDAY FRIDAY NIGHT
Nassau County, NY Weather - Today Sunny Nassau County, NY Weather - Tonight Mostly Clear Nassau County, NY Weather - Monday Mostly Cloudy Nassau County, NY Weather - Monday Night Mostly Cloudy Nassau County, NY Weather - Tuesday Partly Sunny Nassau County, NY Weather - Tuesday Night Partly Cloudy Nassau County, NY Weather - Wednesday Mostly Sunny Nassau County, NY Weather - Wednesday Night Partly Cloudy Nassau County, NY Weather - Thursday Mostly Sunny Nassau County, NY Weather - Thursday Night Partly Cloudy Nassau County, NY Weather - Friday Mostly Sunny Nassau County, NY Weather - Friday Night Mostly Clear
Sunny Mostly Clear Mostly Cloudy Mostly Cloudy Partly Sunny Partly Cloudy Mostly Sunny Partly Cloudy Mostly Sunny Partly Cloudy Mostly Sunny Mostly Clear
Hi: 59°FHi: 15°C
Lo: 45°FLo: 7°C Hi: 61°FHi: 16°C
Lo: 50°FLo: 10°C Hi: 65°FHi: 18°C
Lo: 49°FLo: 9°C Hi: 60°FHi: 16°C
Lo: 49°FLo: 9°C Hi: 65°FHi: 18°C
Lo: 50°FLo: 10°C Hi: 60°FHi: 16°C
Lo: 49°FLo: 9°C
POP = Probability of Precipitation.
Weather Outlook Updated: 224 AM EDT Sun Oct 18 2026 Nassau County, NY Weather - WeatherWorld.com

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Issued: 330 AM EDT Sun Oct 18 2026

Key Messages

1) Sunshine and seasonably cool conditions close the weekend. There is potential for frost formation across parts of the interior tonight.

2) A non-tropical low develops east of the Carolinas early this week and slowly tracks north off the Mid Atlantic through mid to late week. Coastal impacts remain possible.


Discussion

... .KEY MESSAGE 1... A seasonably cool air mass remains in place to close the weekend, with potential for frost tonight across parts of the interior.

Temperatures early...