Winchester, NH Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Winchester, a community in Cheshire County, New Hampshire.
Overnight
55°F
Areas Of Fog
Areas of fog. Mostly clear, with a low around 55. South wind around 0 mph.
7-day forecast for Winchester
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 55°F | Areas Of Fog | 0 mph | 0% |
| Tuesday | 83°F | Areas Of Fog then Sunny | 0 to 5 mph SW | 0% |
| Tuesday Night | 57°F | Partly Cloudy | 0 to 5 mph S | 0% |
| Wednesday | 83°F | Partly Sunny | 0 to 5 mph S | 0% |
| Wednesday Night | 65°F | Partly Cloudy | 0 to 5 mph S | 10% |
| Thursday | 86°F | Mostly Sunny then Chance Showers And Thunderstorms | 0 to 5 mph SW | 60% |
| Thursday Night | 68°F | Chance Showers And Thunderstorms then Partly Cloudy | 0 mph | 52% |
| Friday | 87°F | Mostly Sunny then Chance Showers And Thunderstorms | 0 to 5 mph SW | 35% |
| Friday Night | 67°F | Chance Showers And Thunderstorms | 0 to 5 mph W | 33% |
| Saturday | 86°F | Slight Chance Rain Showers then Chance Showers And Thunderstorms | 0 to 5 mph W | 38% |
| Saturday Night | 65°F | Chance Showers And Thunderstorms then Partly Cloudy | 0 mph | 34% |
| Sunday | 87°F | Sunny | 0 to 5 mph W | 11% |
| Sunday Night | 66°F | Mostly Clear | 0 to 5 mph SW | 11% |
| Monday | 86°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 0 to 10 mph SW | 19% |
Forecast source: National Weather Service (api.weather.gov) for Winchester (42.780, -72.385). Updated through the day.
Growing snapshot for Winchester
Last spring frost
Apr 25
First fall frost
Oct 17
Growing season
175 days
Hardiness zone
6a
More local growing data for Winchester: nearby ZIP 03470 weather · frost dates · planting calendar · New Hampshire frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Tully Lake, Ma (11.2 mi from Winchester). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.