Plymouth, NH Weather & Growing Conditions
Tonight
42°F
Partly Cloudy
Partly cloudy, with a low around 42. South wind around 0 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 42°F | Partly Cloudy | 0 mph | 2% |
| Sunday | 51°F | Rain | 0 to 5 mph SE | 100% |
| Sunday Night | 44°F | Rain | 0 to 5 mph NE | 81% |
| Monday | 60°F | Mostly Sunny | 5 mph NW | 0% |
| Monday Night | 38°F | Mostly Cloudy | 5 mph N | 0% |
| Tuesday | 59°F | Mostly Sunny | 0 to 5 mph NE | 0% |
| Tuesday Night | 40°F | Partly Cloudy | 0 to 5 mph NE | 0% |
| Wednesday | 59°F | Mostly Sunny | 5 mph E | 1% |
| Wednesday Night | 39°F | Partly Cloudy | 0 to 5 mph NE | 1% |
| Thursday | 60°F | Mostly Sunny then Slight Chance Rain Showers | 5 mph NE | 16% |
| Thursday Night | 42°F | Chance Rain Showers | 0 to 5 mph NE | 31% |
| Friday | 59°F | Chance Rain Showers | 5 mph N | 31% |
| Friday Night | 45°F | Chance Rain Showers | 5 to 10 mph N | 35% |
| Saturday | 61°F | Chance Rain Showers | 5 to 10 mph N | 33% |
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 (9.7 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.