Blairstown, NJ Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Blairstown, a community in Warren County, New Jersey.
Today
85°F
Sunny
Sunny, with a high near 85. Wind around 0 mph.
7-day forecast for Blairstown
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 85°F | Sunny | 0 mph | 0% |
| Tonight | 61°F | Mostly Cloudy | 0 mph | 1% |
| Wednesday | 83°F | Partly Sunny then Chance Showers And Thunderstorms | 0 mph | 48% |
| Wednesday Night | 68°F | Showers And Thunderstorms Likely | 0 mph | 56% |
| Thursday | 88°F | Slight Chance Showers And Thunderstorms | 0 to 5 mph SW | 76% |
| Thursday Night | 70°F | Showers And Thunderstorms then Chance Showers And Thunderstorms | 0 to 5 mph W | 76% |
| Friday | 88°F | Showers And Thunderstorms Likely | 0 to 5 mph W | 62% |
| Friday Night | 68°F | Showers And Thunderstorms Likely then Chance Showers And Thunderstorms | 0 mph | 62% |
| Saturday | 86°F | Partly Sunny then Showers And Thunderstorms Likely | 0 to 5 mph W | 56% |
| Saturday Night | 67°F | Showers And Thunderstorms Likely then Slight Chance Showers And Thunderstorms | 0 mph | 56% |
| Sunday | 88°F | Mostly Sunny | 0 to 5 mph W | 13% |
| Sunday Night | 68°F | Mostly Clear | 0 mph | 13% |
| Monday | 89°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 0 to 5 mph W | 17% |
| Monday Night | 66°F | Slight Chance Showers And Thunderstorms | 0 to 5 mph W | 17% |
Forecast source: National Weather Service (api.weather.gov) for Blairstown (40.987, -74.955). Updated through the day.
Growing snapshot for Blairstown
Last spring frost
Apr 24
First fall frost
Oct 16
Growing season
176 days
Hardiness zone
6b
More local growing data for Blairstown: nearby ZIP 07825 weather · frost dates · planting calendar · New Jersey frost dates
Nearby towns & communities
Allamuchy
Alpha
Anderson
Belvidere
Brass Castle
Bridgeville
Broadway
Brookfield
Buttzville
Delaware
Delaware Park
Great Meadows
Greenwich
Hackettstown
Hainesburg
Harmony
Hope
Johnsonburg
Lopatcong Overlook
Marksboro
Mount Hermon
Mountain Lake
New Village
Oxford
Panther Valley
Phillipsburg
Port Colden
Port Murray
Silver Lake
Stewartsville
Climate data from the nearest NOAA station, Newton, Nj (11.7 mi from Blairstown). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.