Marlborough, NH Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Marlborough, a community in Cheshire County, New Hampshire.
Overnight
46°F
Partly Cloudy
Partly cloudy, with a low around 46. South wind around 0 mph.
7-day forecast for Marlborough
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 46°F | Partly Cloudy | 0 mph | 2% |
| Wednesday | 72°F | Sunny | 0 to 5 mph SW | 2% |
| Wednesday Night | 53°F | Partly Cloudy | 5 mph S | 2% |
| Thursday | 68°F | Chance Light Rain | 5 to 10 mph SW | 45% |
| Thursday Night | 57°F | Light Rain Likely | 0 to 10 mph SW | 55% |
| Friday | 68°F | Light Rain Likely | 0 mph | 64% |
| Friday Night | 51°F | Light Rain | 0 mph | 76% |
| Saturday | 62°F | Chance Light Rain | 0 to 5 mph N | 54% |
| Saturday Night | 40°F | Chance Light Rain | 5 mph NW | 39% |
| Sunday | 55°F | Chance Light Rain then Partly Sunny | 5 to 10 mph NW | 27% |
| Sunday Night | 33°F | Partly Cloudy | 0 to 5 mph W | 8% |
| Monday | 52°F | Slight Chance Light Rain | 5 to 10 mph W | 15% |
| Monday Night | 29°F | Partly Cloudy | 5 mph W | 11% |
| Tuesday | 55°F | Mostly Sunny | 5 to 10 mph W | 7% |
Forecast source: National Weather Service (api.weather.gov) for Marlborough (42.905, -72.212). Updated through the day.
Growing snapshot for Marlborough
Last spring frost
May 14
First fall frost
Oct 1
Growing season
138 days
Hardiness zone
6a
More local growing data for Marlborough: nearby ZIP 03455 weather · frost dates · planting calendar · New Hampshire frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Keene, Nh (8.1 mi from Marlborough). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.