Winchester, NH Weather & Growing Conditions
Today
66°F
Mostly Sunny
Mostly sunny, with a high near 66. North wind 0 to 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 66°F | Mostly Sunny | 0 to 5 mph N | 0% |
| Tonight | 44°F | Partly Cloudy | 0 mph | 0% |
| Sunday | 56°F | Rain Showers Likely then Rain | 0 to 5 mph SE | 98% |
| Sunday Night | 45°F | Rain then Rain Showers Likely | 0 to 5 mph NE | 89% |
| Monday | 64°F | Partly Sunny | 5 mph N | 2% |
| Monday Night | 41°F | Mostly Cloudy | 0 to 5 mph N | 0% |
| Tuesday | 61°F | Partly Sunny | 5 mph NE | 1% |
| Tuesday Night | 41°F | Mostly Cloudy | 0 to 5 mph NE | 1% |
| Wednesday | 62°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 | 60°F | Chance Rain Showers | 5 to 10 mph NE | 33% |
| Thursday Night | 42°F | Chance Rain Showers | 5 to 10 mph N | 33% |
| Friday | 63°F | Chance Rain Showers | 10 mph N | 33% |
| Friday Night | 43°F | Chance Rain Showers | 5 to 10 mph N | 32% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Winchester, NH
Last spring frost
Apr 25
First fall frost
Oct 17
Growing season
175 days
Hardiness zone
6a
Explore more for Winchester, NH: full frost dates · planting calendar · New Hampshire frost dates
Climate data from the nearest NOAA station, Tully Lake, Ma (11.2 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.