Winchester, NH Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Winchester, a community in Cheshire County, New Hampshire.
Overnight
43°F
Partly Cloudy
Partly cloudy, with a low around 43. North wind around 0 mph.
7-day forecast for Winchester
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 43°F | Partly Cloudy | 0 mph | 0% |
| Saturday | 68°F | Mostly Sunny | 0 to 5 mph N | 0% |
| Saturday Night | 44°F | Partly Cloudy | 0 mph | 0% |
| Sunday | 57°F | Rain Showers Likely then Rain | 0 to 5 mph SE | 98% |
| Sunday Night | 45°F | Rain then Chance Rain Showers | 0 to 5 mph NE | 89% |
| Monday | 65°F | Partly Sunny | 5 mph N | 2% |
| Monday Night | 41°F | Mostly Cloudy | 0 to 5 mph N | 0% |
| Tuesday | 62°F | Partly Sunny | 5 mph NE | 1% |
| Tuesday Night | 40°F | Mostly Cloudy | 0 to 5 mph NE | 1% |
| Wednesday | 63°F | Partly Sunny | 5 to 10 mph NE | 2% |
| Wednesday Night | 40°F | Mostly Cloudy then Slight Chance Rain Showers | 0 to 5 mph NE | 18% |
| Thursday | 62°F | Chance Rain Showers | 5 mph NE | 33% |
| Thursday Night | 42°F | Chance Rain Showers | 5 to 10 mph N | 33% |
| Friday | 64°F | Chance Rain Showers | 10 mph N | 33% |
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 Sep 19, 2026.