Newmarket, NH Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Newmarket, a community in Rockingham County, New Hampshire.
Overnight
48°F
Partly Cloudy
Partly cloudy, with a low around 48. West wind around 5 mph.
7-day forecast for Newmarket
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 48°F | Partly Cloudy | 5 mph W | 2% |
| Wednesday | 75°F | Mostly Sunny | 5 mph SW | 3% |
| Wednesday Night | 56°F | Partly Cloudy | 5 mph SW | 2% |
| Thursday | 74°F | Mostly Cloudy then Chance Light Rain | 5 to 10 mph SW | 38% |
| Thursday Night | 60°F | Mostly Cloudy then Chance Light Rain | 5 to 10 mph SW | 38% |
| Friday | 70°F | Light Rain | 0 mph | 77% |
| Friday Night | 54°F | Light Rain | 0 to 5 mph E | 92% |
| Saturday | 63°F | Light Rain | 5 mph N | 78% |
| Saturday Night | 43°F | Chance Light Rain | 5 mph NW | 35% |
| Sunday | 57°F | Chance Light Rain | 5 to 10 mph W | 30% |
| Sunday Night | 36°F | Partly Cloudy | 5 mph W | 8% |
| Monday | 55°F | Mostly Sunny | 5 to 10 mph W | 14% |
| Monday Night | 33°F | Partly Cloudy | 5 mph W | 13% |
| Tuesday | 57°F | Mostly Sunny | 5 to 10 mph SW | 9% |
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 Nov 4, 2026.