Marlborough, NH Weather & Growing Conditions
Today
70°F
Sunny
Sunny, with a high near 70. Southwest wind 0 to 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 70°F | Sunny | 0 to 5 mph SW | 2% |
| Tonight | 53°F | Partly Cloudy | 5 mph S | 2% |
| Thursday | 66°F | Chance Light Rain | 5 to 10 mph SW | 45% |
| Thursday Night | 57°F | Light Rain Likely | 0 to 10 mph SW | 55% |
| Friday | 66°F | Light Rain Likely | 0 mph | 65% |
| Friday Night | 50°F | Light Rain | 0 mph | 77% |
| Saturday | 60°F | Light Rain Likely | 0 to 5 mph N | 55% |
| Saturday Night | 40°F | Chance Light Rain | 5 mph NW | 39% |
| Sunday | 54°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 | 50°F | Slight Chance Light Rain | 5 to 10 mph W | 15% |
| Monday Night | 30°F | Partly Cloudy | 5 mph W | 11% |
| Tuesday | 53°F | Mostly Sunny | 5 to 10 mph W | 7% |
| Tuesday Night | 30°F | Partly Cloudy | 5 mph W | 5% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Marlborough, NH
Last spring frost
May 14
First fall frost
Oct 1
Growing season
138 days
Hardiness zone
6a
Explore more for Marlborough, NH: full frost dates · planting calendar · New Hampshire frost dates
Climate data from the nearest NOAA station, Keene, Nh (8.1 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.