Harman US

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

WhenTempForecastWindPrecip
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.