Plymouth, NH Weather & Growing Conditions
Tonight
40°F
Partly Cloudy
Partly cloudy, with a low around 40. Northwest wind around 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 40°F | Partly Cloudy | 5 mph NW | 0% |
| Saturday | 62°F | Sunny | 5 mph W | 0% |
| Saturday Night | 43°F | Mostly Cloudy | 0 mph | 0% |
| Sunday | 57°F | Rain Showers | 0 to 5 mph SE | 83% |
| Sunday Night | 45°F | Rain Showers | 0 to 5 mph NE | 75% |
| Monday | 62°F | Mostly Sunny | 5 mph NW | 1% |
| Monday Night | 41°F | Partly Cloudy | 0 to 5 mph N | 1% |
| Tuesday | 60°F | Partly Sunny | 0 to 5 mph NE | 1% |
| Tuesday Night | 40°F | Mostly Cloudy | 0 to 5 mph NE | 2% |
| Wednesday | 59°F | Mostly Sunny | 5 to 10 mph E | 2% |
| Wednesday Night | 40°F | Mostly Cloudy | 0 to 5 mph E | 8% |
| Thursday | 58°F | Slight Chance Rain Showers | 0 to 5 mph NE | 23% |
| Thursday Night | 44°F | Slight Chance Rain Showers | 0 mph | 24% |
| Friday | 63°F | Slight Chance Rain Showers | 0 to 5 mph N | 23% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Plymouth, NH
Last spring frost
May 20
First fall frost
Sep 27
Growing season
128 days
Hardiness zone
5b
Explore more for Plymouth, NH: full frost dates · planting calendar · New Hampshire frost dates
Climate data from the nearest NOAA station, Plymouth, Nh (4 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.