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Sullivan County, NH Weather Forecast

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Sullivan County, NH Weather Forecast

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Sullivan County NH weather - Overcast - 42°F
Overcast
42°F
Updated 5:25 am
Feels Like 44°F
Humidity 100%
Wind N 0 mph
Barometer  30.14 in
Dew Point 42°F
Sullivan County NH weather - Overcast - 6°C
Overcast
6°C
Updated 5:25 am
Feels Like 7°C
Humidity 100%
Wind N 0 km/h
Barometer  102.1 kPa
Dew Point 6°C
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Sullivan County Weather Forecast

REST OF TONIGHT SUNDAY SUNDAY NIGHT MONDAY MONDAY NIGHT TUESDAY TUESDAY NIGHT WEDNESDAY WEDNESDAY NIGHT THURSDAY THURSDAY NIGHT FRIDAY
Sullivan County, NH Weather - Rest Of Tonight Partly Cloudy Sullivan County, NH Weather - Sunday Chance Of Showers Sullivan County, NH Weather - Sunday Night Chance Of Showers Sullivan County, NH Weather - Monday Patchy Fog Sullivan County, NH Weather - Monday Night Mostly Cloudy Sullivan County, NH Weather - Tuesday Mostly Cloudy Sullivan County, NH Weather - Tuesday Night Partly Cloudy Sullivan County, NH Weather - Wednesday Partly Sunny Sullivan County, NH Weather - Wednesday Night Partly Cloudy Sullivan County, NH Weather - Thursday Partly Sunny Sullivan County, NH Weather - Thursday Night Partly Cloudy Sullivan County, NH Weather - Friday Chance Of Showers
Partly Cloudy Chance of Showers Chance of Showers Patchy Fog Mostly Cloudy Mostly Cloudy Partly Cloudy Partly Sunny Partly Cloudy Partly Sunny Partly Cloudy Chance of Showers
Lo: 40°FLo: 4°C Hi: 55°FHi: 13°C
 Lo: 45°FLo: 7°C Hi: 61°FHi: 16°C
 Lo: 41°FLo: 5°C Hi: 60°FHi: 16°C
 Lo: 41°FLo: 5°C Hi: 60°FHi: 16°C
 Lo: 40°FLo: 4°C Hi: 61°FHi: 16°C
 Lo: 41°FLo: 5°C Hi: 60°FHi: 16°C
POP: 100% POP: 90% POP: 30%
POP = Probability of Precipitation.
Weather Outlook Updated: 227 AM EDT Sun Sep 20 2026 Sullivan County, NH Weather - WeatherWorld.com

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Issued: 259 AM EDT Sun Sep 20 2026

Key Messages

1. Low pressure will bring a period of rain today into tonight.

2. High pressure brings mostly fair weather Monday through Wednesday with temperatures running below normal. Rain chances increase during the Friday to Sunday timeframe as a possible coastal low develops along the Eastern Seaboard.


Discussion

... KEY MESSAGE 1 DESCRIPTION...

A short wave trough will approach from the west early today with rapidly increasing clouds. Increasing forcing for ascent will aid in a shield of overru...