Somersworth, NH Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Somersworth, a city in Strafford County, New Hampshire.
Overnight
47°F
Mostly Cloudy
Mostly cloudy, with a low around 47. West wind 0 to 5 mph.
7-day forecast for Somersworth
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 47°F | Mostly Cloudy | 0 to 5 mph W | 2% |
| Wednesday | 75°F | Mostly Sunny | 5 mph SW | 3% |
| Wednesday Night | 54°F | Partly Cloudy | 5 mph SW | 2% |
| Thursday | 73°F | Mostly Cloudy then Chance Light Rain | 5 to 10 mph SW | 43% |
| Thursday Night | 59°F | Mostly Cloudy then Chance Light Rain | 5 to 10 mph SW | 26% |
| Friday | 70°F | Light Rain Likely | 0 to 5 mph S | 73% |
| Friday Night | 53°F | Light Rain | 0 to 5 mph E | 92% |
| Saturday | 62°F | Light Rain | 5 mph N | 78% |
| Saturday Night | 43°F | Chance Light Rain | 5 to 10 mph N | 38% |
| Sunday | 56°F | Chance Light Rain | 5 to 10 mph NW | 32% |
| Sunday Night | 35°F | Partly Cloudy | 5 mph W | 8% |
| Monday | 54°F | Mostly Sunny | 5 to 15 mph W | 14% |
| Monday Night | 33°F | Partly Cloudy | 5 mph W | 13% |
| Tuesday | 56°F | Mostly Sunny | 5 to 15 mph W | 8% |
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
Nearby towns & communities
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 Nov 4, 2026.