Washington, NJ Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Washington, a borough in Warren County, New Jersey.
Tonight
57°F
Mostly Cloudy then Chance Rain Showers
A chance of rain showers after 2am. Mostly cloudy, with a low around 57. Southeast wind 0 to 5 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Washington
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 57°F | Mostly Cloudy then Chance Rain Showers | 0 to 5 mph SE | 39% |
| Sunday | 71°F | Rain Showers | 5 mph SE | 96% |
| Sunday Night | 55°F | Showers And Thunderstorms then Mostly Cloudy | 0 to 5 mph NW | 85% |
| Monday | 69°F | Partly Sunny then Slight Chance Rain Showers | 5 mph NE | 22% |
| Monday Night | 50°F | Chance Rain Showers | 5 mph NE | 31% |
| Tuesday | 63°F | Chance Rain Showers | 5 mph NE | 35% |
| Tuesday Night | 48°F | Chance Rain Showers then Mostly Cloudy | 5 to 10 mph NE | 33% |
| Wednesday | 63°F | Slight Chance Rain Showers | 10 mph NE | 19% |
| Wednesday Night | 48°F | Slight Chance Rain Showers | 5 to 10 mph NE | 21% |
| Thursday | 61°F | Slight Chance Rain Showers | 5 to 10 mph NE | 24% |
| Thursday Night | 48°F | Chance Rain Showers | 5 to 10 mph NE | 30% |
| Friday | 65°F | Chance Rain Showers | 10 mph N | 33% |
| Friday Night | 49°F | Chance Rain Showers | 5 to 10 mph N | 33% |
| Saturday | 69°F | Chance Rain Showers | 5 to 10 mph N | 28% |
Forecast source: National Weather Service (api.weather.gov) for Washington (40.759, -74.983). Updated through the day.
Growing snapshot for Washington
Last spring frost
Apr 30
First fall frost
Oct 18
Growing season
168 days
Hardiness zone
6b
More local growing data for Washington: nearby ZIP 07882 weather · frost dates · planting calendar · New Jersey frost dates
Nearby towns & communities
Allamuchy
Alpha
Anderson
Belvidere
Blairstown
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
Climate data from the nearest NOAA station, Belvidere Brg, Nj (6.4 mi from Washington). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.