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Somersworth, NH Weather & Growing Conditions

Local forecast, frost dates, hardiness zone and planting guidance for Somersworth, a city in Strafford County, New Hampshire.

Today
65°F
Sunny
Sunny, with a high near 65. Northeast wind 0 to 5 mph.

7-day forecast for Somersworth

WhenTempForecastWindPrecip
Today 65°F Sunny 0 to 5 mph NE 0%
Tonight 43°F Partly Cloudy 0 to 5 mph SW 0%
Sunday 60°F Mostly Cloudy then Rain 0 to 5 mph SE 85%
Sunday Night 45°F Rain 0 to 5 mph NE 83%
Monday 67°F Mostly Sunny 5 to 10 mph N 4%
Monday Night 43°F Mostly Cloudy 5 mph N 0%
Tuesday 61°F Partly Sunny 5 to 10 mph NE 0%
Tuesday Night 42°F Partly Cloudy 0 to 10 mph NE 1%
Wednesday 61°F Mostly Sunny 10 to 15 mph NE 1%
Wednesday Night 42°F Mostly Cloudy then Slight Chance Rain Showers 0 to 10 mph NE 15%
Thursday 61°F Chance Rain Showers 5 to 10 mph NE 31%
Thursday Night 43°F Chance Rain Showers 5 to 15 mph NE 33%
Friday 63°F Chance Rain Showers 15 mph N 33%
Friday Night 45°F Chance Rain Showers 10 to 15 mph NE 31%

Forecast source: National Weather Service (api.weather.gov) for Somersworth (43.253, -70.888). Updated through the day.

Growing snapshot for Somersworth

Last spring frost
Apr 30
First fall frost
Oct 9
Growing season
161 days
Hardiness zone
6a

More local growing data for Somersworth: nearby ZIP 03878 weather · frost dates · planting calendar · New Hampshire frost dates

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Climate data from the nearest NOAA station, Rochester Skyhaven Ap, Nh (2.4 mi from Somersworth). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.