Charlestown, NH Weather & Growing Conditions
Overnight
42°F
Partly Cloudy
Partly cloudy, with a low around 42. South wind 0 to 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 42°F | Partly Cloudy | 0 to 5 mph S | 0% |
| Sunday | 53°F | Rain | 0 mph | 100% |
| Sunday Night | 42°F | Rain then Patchy Fog | 0 to 5 mph NE | 77% |
| Monday | 62°F | Patchy Fog then Mostly Sunny | 5 mph N | 0% |
| Monday Night | 38°F | Mostly Cloudy | 0 to 5 mph N | 0% |
| Tuesday | 60°F | Partly Sunny | 0 to 5 mph NE | 0% |
| Tuesday Night | 39°F | Partly Cloudy | 0 to 5 mph NE | 1% |
| Wednesday | 60°F | Mostly Sunny | 5 to 10 mph E | 1% |
| Wednesday Night | 38°F | Partly Cloudy | 0 to 5 mph NE | 4% |
| Thursday | 60°F | Slight Chance Rain Showers | 5 mph NE | 16% |
| Thursday Night | 40°F | Chance Rain Showers | 0 to 5 mph NE | 30% |
| Friday | 60°F | Chance Rain Showers | 5 to 10 mph NE | 34% |
| Friday Night | 42°F | Chance Rain Showers | 5 to 10 mph N | 38% |
| Saturday | 63°F | Chance Rain Showers | 10 mph N | 37% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Charlestown, NH
Last spring frost
May 14
First fall frost
Oct 1
Growing season
140 days
Hardiness zone
5b
Explore more for Charlestown, NH: full frost dates · planting calendar · New Hampshire frost dates
Climate data from the nearest NOAA station, Newport, Nh (13 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.