Somersworth, NH Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Somersworth, a city in Strafford County, New Hampshire.
This Afternoon
66°F
Sunny
Sunny, with a high near 66. Southwest wind 0 to 5 mph.
7-day forecast for Somersworth
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 66°F | Sunny | 0 to 5 mph SW | 0% |
| Tonight | 45°F | Partly Cloudy | 0 to 5 mph SW | 0% |
| Sunday | 59°F | Rain | 0 to 5 mph SE | 91% |
| Sunday Night | 46°F | Rain | 5 mph NE | 77% |
| Monday | 68°F | Mostly Sunny | 5 to 10 mph N | 0% |
| Monday Night | 41°F | Mostly Cloudy | 0 to 5 mph N | 0% |
| Tuesday | 62°F | Partly Sunny | 5 to 10 mph NE | 0% |
| Tuesday Night | 43°F | Partly Cloudy | 0 to 10 mph NE | 0% |
| Wednesday | 62°F | Mostly Sunny | 10 to 15 mph NE | 1% |
| Wednesday Night | 42°F | Partly Cloudy | 0 to 5 mph NE | 3% |
| Thursday | 62°F | Slight Chance Rain Showers | 5 to 10 mph NE | 17% |
| Thursday Night | 44°F | Chance Rain Showers | 5 to 15 mph NE | 30% |
| Friday | 63°F | Chance Rain Showers | 15 mph NE | 37% |
| Friday Night | 47°F | Chance Rain Showers | 15 mph N | 39% |
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 Sep 20, 2026.