Plymouth, NH Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Plymouth, a community in Grafton County, New Hampshire.
This Afternoon
64°F
Sunny
Sunny, with a high near 64. West wind around 0 mph.
7-day forecast for Plymouth
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 64°F | Sunny | 0 mph | 0% |
| Tonight | 41°F | Partly Cloudy | 0 mph | 3% |
| Sunday | 53°F | Rain | 0 to 5 mph SE | 100% |
| Sunday Night | 43°F | Rain | 0 to 5 mph NE | 81% |
| Monday | 63°F | Mostly Sunny | 5 mph NW | 0% |
| Monday Night | 38°F | Mostly Cloudy | 0 to 5 mph N | 0% |
| Tuesday | 61°F | Mostly Sunny | 0 mph | 0% |
| Tuesday Night | 40°F | Partly Cloudy | 0 mph | 0% |
| Wednesday | 62°F | Mostly Sunny | 0 to 5 mph NE | 1% |
| Wednesday Night | 38°F | Partly Cloudy | 0 to 5 mph NE | 1% |
| Thursday | 62°F | Mostly Sunny then Slight Chance Rain Showers | 0 to 5 mph NE | 16% |
| Thursday Night | 41°F | Chance Rain Showers | 0 to 5 mph NE | 30% |
| Friday | 61°F | Chance Rain Showers | 5 mph N | 30% |
| Friday Night | 44°F | Chance Rain Showers | 0 to 10 mph N | 35% |
Forecast source: National Weather Service (api.weather.gov) for Plymouth (43.739, -71.703). Updated through the day.
Growing snapshot for Plymouth
Last spring frost
May 20
First fall frost
Sep 27
Growing season
128 days
Hardiness zone
5b
More local growing data for Plymouth: nearby ZIP 03264 weather · frost dates · planting calendar · New Hampshire frost dates
Nearby towns & communities
Ashland
Bethlehem
Bristol
Canaan
Enfield
Lebanon
Lincoln
Lisbon
Littleton
Mountain Lakes
North Haverhill
North Woodstock
Woodsville
Climate data from the nearest NOAA station, Plymouth, Nh (4 mi from Plymouth). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.