Charlestown, NH Weather & Growing Conditions
Today
78°F
Sunny
Sunny, with a high near 78. West wind around 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 78°F | Sunny | 5 mph W | 0% |
| Tonight | 56°F | Mostly Clear then Areas Of Fog | 0 to 5 mph SW | 0% |
| Wednesday | 80°F | Areas Of Fog then Partly Sunny | 0 to 5 mph SW | 0% |
| Wednesday Night | 63°F | Partly Cloudy | 5 mph S | 10% |
| Thursday | 83°F | Mostly Sunny then Chance Showers And Thunderstorms | 0 to 5 mph SW | 46% |
| Thursday Night | 66°F | Chance Showers And Thunderstorms then Partly Cloudy | 5 mph SW | 41% |
| Friday | 83°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 0 to 5 mph W | 24% |
| Friday Night | 64°F | Slight Chance Showers And Thunderstorms | 0 to 5 mph W | 23% |
| Saturday | 81°F | Chance Rain Showers then Chance Showers And Thunderstorms | 0 to 5 mph W | 48% |
| Saturday Night | 63°F | Chance Showers And Thunderstorms then Partly Cloudy | 0 to 5 mph W | 42% |
| Sunday | 83°F | Sunny | 0 to 5 mph W | 10% |
| Sunday Night | 64°F | Mostly Clear | 5 mph SW | 9% |
| Monday | 82°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 5 to 10 mph SW | 23% |
| Monday Night | 61°F | Slight Chance Showers And Thunderstorms | 5 to 10 mph W | 23% |
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
6a
Explore more for Charlestown, NH: full frost dates · planting calendar · New Hampshire frost dates
Climate data from the nearest NOAA station, Newport, Nh (11.2 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.