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
86°F
Sunny
Sunny, with a high near 86. West wind 5 to 10 mph.
7-day forecast for Newmarket
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 86°F | Sunny | 5 to 10 mph W | 0% |
| Tonight | 61°F | Mostly Clear | 0 to 5 mph SW | 0% |
| Wednesday | 86°F | Partly Sunny | 0 to 5 mph SW | 0% |
| Wednesday Night | 67°F | Partly Cloudy | 0 to 5 mph SW | 6% |
| Thursday | 88°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 0 to 5 mph SW | 32% |
| Thursday Night | 70°F | Chance Showers And Thunderstorms then Partly Cloudy | 0 to 5 mph SW | 28% |
| Friday | 91°F | Sunny then Slight Chance Showers And Thunderstorms | 0 to 5 mph W | 27% |
| Friday Night | 69°F | Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms | 0 to 5 mph W | 26% |
| Saturday | 88°F | Partly Sunny then Chance Showers And Thunderstorms | 0 to 5 mph W | 50% |
| Saturday Night | 68°F | Chance Showers And Thunderstorms then Partly Cloudy | 0 to 5 mph W | 44% |
| Sunday | 88°F | Sunny | 0 to 5 mph W | 10% |
| Sunday Night | 69°F | Mostly Clear | 5 mph SW | 10% |
| Monday | 89°F | Sunny | 5 to 10 mph W | 14% |
| Monday Night | 67°F | Mostly Clear | 5 mph W | 14% |
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 Aug 4, 2026.