Marlborough, NH Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Marlborough, a community in Cheshire County, New Hampshire.
Today
66°F
Mostly Sunny
Mostly sunny, with a high near 66. Northwest wind around 0 mph.
7-day forecast for Marlborough
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 66°F | Mostly Sunny | 0 mph | 0% |
| Tonight | 43°F | Partly Cloudy | 0 mph | 0% |
| Sunday | 56°F | Rain Showers Likely then Rain | 0 to 5 mph SE | 98% |
| Sunday Night | 44°F | Rain then Rain Showers Likely | 0 to 5 mph NE | 90% |
| 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 | 17% |
| Thursday | 60°F | Chance Rain Showers | 5 to 10 mph NE | 33% |
| Thursday Night | 42°F | Chance Rain Showers | 5 to 10 mph NE | 33% |
| Friday | 62°F | Chance Rain Showers | 10 mph NE | 33% |
| Friday Night | 43°F | Chance Rain Showers | 10 mph NE | 32% |
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 Sep 19, 2026.