Blackwells Mills, NJ Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Blackwells Mills, a community in Somerset County, New Jersey.
Today
84°F
Mostly Sunny
Mostly sunny, with a high near 84. East wind around 0 mph.
7-day forecast for Blackwells Mills
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 84°F | Mostly Sunny | 0 mph | 0% |
| Tonight | 63°F | Mostly Cloudy | 0 mph | 2% |
| Wednesday | 84°F | Partly Sunny then Chance Showers And Thunderstorms | 0 to 5 mph E | 51% |
| Wednesday Night | 70°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 0 mph | 57% |
| Thursday | 89°F | Slight Chance Rain Showers then Chance Showers And Thunderstorms | 0 to 5 mph SW | 35% |
| Thursday Night | 72°F | Chance Showers And Thunderstorms | 0 to 5 mph SW | 39% |
| Friday | 89°F | Mostly Sunny then Chance Showers And Thunderstorms | 0 to 5 mph SW | 45% |
| Friday Night | 70°F | Chance Showers And Thunderstorms | 0 to 5 mph SW | 46% |
| Saturday | 87°F | Partly Sunny then Chance Showers And Thunderstorms | 0 to 5 mph W | 37% |
| Saturday Night | 69°F | Chance Showers And Thunderstorms | 0 to 5 mph W | 37% |
| Sunday | 88°F | Mostly Sunny | 0 to 5 mph W | 14% |
| Sunday Night | 70°F | Mostly Clear | 0 to 5 mph W | 14% |
| Monday | 90°F | Sunny | 0 to 10 mph W | 10% |
| Monday Night | 69°F | Partly Cloudy | 0 to 5 mph W | 13% |
Forecast source: National Weather Service (api.weather.gov) for Blackwells Mills (40.481, -74.598). Updated through the day.
Growing snapshot for Blackwells Mills
Last spring frost
Apr 15
First fall frost
Oct 26
Growing season
193 days
Hardiness zone
7a
More local growing data for Blackwells Mills: nearby ZIP 08823 weather · frost dates · planting calendar · New Jersey frost dates
Nearby towns & communities
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Neshanic
Climate data from the nearest NOAA station, New Brunswick 3 Se, Nj (7.9 mi from Blackwells Mills). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.