Greenwich, NJ Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Greenwich, a community in Cumberland County, New Jersey.
Today
86°F
Mostly Sunny
Mostly sunny, with a high near 86. East wind around 5 mph.
7-day forecast for Greenwich
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 86°F | Mostly Sunny | 5 mph E | 0% |
| Tonight | 69°F | Mostly Cloudy then Slight Chance Rain Showers | 0 to 5 mph E | 20% |
| Wednesday | 85°F | Showers And Thunderstorms Likely | 0 to 10 mph SE | 71% |
| Wednesday Night | 75°F | Showers And Thunderstorms Likely then Partly Cloudy | 5 to 10 mph S | 64% |
| Thursday | 90°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 5 to 10 mph SW | 18% |
| Thursday Night | 76°F | Slight Chance Showers And Thunderstorms | 5 to 10 mph SW | 18% |
| Friday | 90°F | Sunny then Slight Chance Showers And Thunderstorms | 5 to 10 mph SW | 23% |
| Friday Night | 74°F | Chance Showers And Thunderstorms | 5 mph SW | 42% |
| Saturday | 89°F | Mostly Sunny then Chance Showers And Thunderstorms | 5 to 10 mph SW | 34% |
| Saturday Night | 73°F | Chance Showers And Thunderstorms | 5 mph SW | 34% |
| Sunday | 89°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 5 mph W | 20% |
| Sunday Night | 74°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 5 mph SW | 20% |
| Monday | 91°F | Sunny | 5 to 10 mph W | 8% |
| Monday Night | 74°F | Partly Cloudy | 5 mph W | 12% |
Forecast source: National Weather Service (api.weather.gov) for Greenwich (39.389, -75.344). Updated through the day.
Growing snapshot for Greenwich
Last spring frost
Apr 10
First fall frost
Nov 1
Growing season
205 days
Hardiness zone
7b
More local growing data for Greenwich: nearby ZIP 08323 weather · frost dates · planting calendar · New Jersey frost dates
Nearby towns & communities
Arrowhead Lake
Bridgeton
Carlls Corner
Cedarville
Centre Grove
Cumberland-Hesstown
Deerfield Street
Delmont
Dividing Creek
Dorchester
Dutch Neck
Fairton
Fortescue
Gandys Beach
Gouldtown
Heislerville
Lakeside-Beebe Run
Laurel Heights
Laurel Lake
Leesburg
Marlboro
Mauricetown
Millville
Money Island
Newport
Othello
Port Elizabeth
Port Norris
Roadstown
Rosenhayn
Climate data from the nearest NOAA station, Seabrook Farms, Nj (10.1 mi from Greenwich). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.