Newmarket, NH Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Newmarket, a community in Rockingham County, New Hampshire.
Tonight
45°F
Partly Cloudy
Partly cloudy, with a low around 45. Northwest wind around 5 mph.
7-day forecast for Newmarket
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 45°F | Partly Cloudy | 5 mph NW | 0% |
| Saturday | 65°F | Sunny | 5 to 10 mph E | 0% |
| Saturday Night | 46°F | Partly Cloudy | 0 to 10 mph S | 0% |
| Sunday | 63°F | Rain Showers Likely | 0 to 5 mph S | 74% |
| Sunday Night | 50°F | Rain Showers | 0 to 5 mph NE | 81% |
| Monday | 65°F | Slight Chance Rain Showers then Mostly Sunny | 5 to 10 mph NE | 22% |
| Monday Night | 46°F | Partly Cloudy | 0 to 5 mph NE | 3% |
| Tuesday | 61°F | Partly Sunny | 5 to 10 mph NE | 3% |
| Tuesday Night | 45°F | Mostly Cloudy | 0 to 5 mph NE | 1% |
| Wednesday | 60°F | Mostly Sunny | 5 to 15 mph NE | 3% |
| Wednesday Night | 45°F | Mostly Cloudy | 5 mph NE | 9% |
| Thursday | 60°F | Chance Rain Showers | 5 to 10 mph NE | 27% |
| Thursday Night | 47°F | Chance Rain Showers | 5 mph NE | 28% |
| Friday | 64°F | Chance Rain Showers | 5 to 10 mph N | 33% |
Forecast source: National Weather Service (api.weather.gov) for Newmarket (43.076, -70.941). Updated through the day.
Growing snapshot for Newmarket
Last spring frost
May 7
First fall frost
Oct 4
Growing season
150 days
Hardiness zone
6a
More local growing data for Newmarket: nearby ZIP 03857 weather · frost dates · planting calendar · New Hampshire frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Durham 2 Ssw, Nh (2.6 mi from Newmarket). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.