Newmarket, NH Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Newmarket, a community in Rockingham County, New Hampshire.
This Afternoon
66°F
Mostly Sunny
Mostly sunny, with a high near 66. Southeast wind around 5 mph.
7-day forecast for Newmarket
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 66°F | Mostly Sunny | 5 mph SE | 0% |
| Tonight | 46°F | Partly Cloudy | 0 to 5 mph SW | 0% |
| Sunday | 60°F | Rain | 0 to 5 mph SE | 90% |
| Sunday Night | 47°F | Rain | 5 mph NE | 78% |
| Monday | 68°F | Mostly Sunny | 5 to 10 mph NE | 0% |
| Monday Night | 45°F | Mostly Cloudy | 0 to 5 mph NE | 0% |
| Tuesday | 62°F | Partly Sunny | 5 mph NE | 1% |
| Tuesday Night | 45°F | Partly Cloudy | 0 to 5 mph NE | 0% |
| Wednesday | 62°F | Mostly Sunny | 5 to 10 mph NE | 1% |
| Wednesday Night | 44°F | Partly Cloudy then Slight Chance Rain Showers | 0 to 5 mph NE | 15% |
| Thursday | 62°F | Slight Chance Rain Showers | 5 to 10 mph NE | 19% |
| Thursday Night | 46°F | Chance Rain Showers | 5 to 10 mph NE | 31% |
| Friday | 62°F | Chance Rain Showers | 10 to 15 mph NE | 39% |
| Friday Night | 47°F | Chance Rain Showers | 10 to 15 mph N | 40% |
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 20, 2026.