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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

WhenTempForecastWindPrecip
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

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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.