Plymouth, NH Weather & Growing Conditions
Today
71°F
Mostly Sunny
Mostly sunny. High near 71, with temperatures falling to around 63 in the afternoon. Southwest wind 0 to 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 71°F | Mostly Sunny | 0 to 5 mph SW | 3% |
| Tonight | 48°F | Partly Cloudy | 0 mph | 2% |
| Thursday | 65°F | Light Rain Likely | 0 to 5 mph S | 74% |
| Thursday Night | 53°F | Chance Light Rain | 0 to 5 mph SW | 42% |
| Friday | 64°F | Chance Light Rain | 0 mph | 37% |
| Friday Night | 49°F | Light Rain Likely | 0 mph | 70% |
| Saturday | 58°F | Light Rain Likely | 0 mph | 55% |
| Saturday Night | 41°F | Chance Light Rain | 0 to 10 mph NW | 44% |
| Sunday | 51°F | Chance Light Rain | 5 to 10 mph NW | 36% |
| Sunday Night | 35°F | Slight Chance Light Rain | 5 mph NW | 17% |
| Monday | 48°F | Slight Chance Light Rain | 5 to 10 mph W | 24% |
| Monday Night | 31°F | Slight Chance Light Rain then Partly Cloudy | 5 to 10 mph W | 18% |
| Tuesday | 50°F | Mostly Sunny | 5 to 10 mph W | 13% |
| Tuesday Night | 32°F | Mostly Cloudy | 5 to 10 mph W | 13% |
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 Nov 4, 2026.