New Boston, NH Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for New Boston, a community in Hillsborough County, New Hampshire.
Tonight
44°F
Partly Cloudy
Partly cloudy, with a low around 44. Northwest wind 0 to 5 mph.
7-day forecast for New Boston
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 44°F | Partly Cloudy | 0 to 5 mph NW | 0% |
| Saturday | 65°F | Sunny | 0 to 5 mph N | 0% |
| Saturday Night | 45°F | Partly Cloudy | 0 to 5 mph S | 0% |
| Sunday | 59°F | Rain Showers | 0 to 5 mph S | 84% |
| Sunday Night | 48°F | Rain Showers | 0 to 5 mph NE | 82% |
| Monday | 63°F | Slight Chance Rain Showers then Mostly Sunny | 5 mph N | 15% |
| Monday Night | 44°F | Partly Cloudy | 0 to 5 mph N | 3% |
| Tuesday | 59°F | Mostly Cloudy | 5 mph NE | 3% |
| Tuesday Night | 42°F | Mostly Cloudy | 0 to 5 mph NE | 2% |
| Wednesday | 58°F | Mostly Sunny | 5 to 10 mph NE | 4% |
| Wednesday Night | 43°F | Mostly Cloudy then Slight Chance Rain Showers | 0 to 5 mph NE | 19% |
| Thursday | 57°F | Chance Rain Showers | 5 to 10 mph NE | 28% |
| Thursday Night | 45°F | Chance Rain Showers | 0 to 5 mph NE | 28% |
| Friday | 63°F | Chance Rain Showers | 5 mph N | 30% |
Forecast source: National Weather Service (api.weather.gov) for New Boston (42.978, -71.694). Updated through the day.
Growing snapshot for New Boston
Last spring frost
May 2
First fall frost
Oct 8
Growing season
158 days
Hardiness zone
6a
More local growing data for New Boston: nearby ZIP 03070 weather · frost dates · planting calendar · New Hampshire frost dates
Nearby towns & communities
Amherst
Antrim
Bennington
East Merrimack
Francestown
Goffstown
Greenville
Hancock
Hillsborough
Hudson
Klondike Corner
Manchester
Milford
Nashua
Peterborough
Pinardville
South Hooksett
Wilton
Climate data from the nearest NOAA station, Weare, Nh (7.9 mi from New Boston). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.