South River, NJ Weather & Growing Conditions
Today
84°F
Mostly Sunny
Mostly sunny, with a high near 84. Northeast wind 0 to 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 84°F | Mostly Sunny | 0 to 5 mph NE | 0% |
| Tonight | 65°F | Mostly Cloudy | 0 to 5 mph SE | 1% |
| Wednesday | 84°F | Mostly Cloudy then Chance Showers And Thunderstorms | 0 to 5 mph E | 50% |
| Wednesday Night | 71°F | Chance Showers And Thunderstorms | 0 to 5 mph S | 41% |
| Thursday | 90°F | Slight Chance Rain Showers then Chance Showers And Thunderstorms | 0 to 5 mph SW | 35% |
| Thursday Night | 73°F | Chance Showers And Thunderstorms | 5 mph SW | 35% |
| Friday | 91°F | Mostly Sunny then Chance Showers And Thunderstorms | 5 mph SW | 43% |
| Friday Night | 71°F | Chance Showers And Thunderstorms | 0 to 5 mph SW | 44% |
| Saturday | 89°F | Partly Sunny then Chance Showers And Thunderstorms | 0 to 5 mph W | 37% |
| Saturday Night | 70°F | Chance Showers And Thunderstorms | 0 to 5 mph W | 37% |
| Sunday | 89°F | Mostly Sunny | 0 to 5 mph W | 14% |
| Sunday Night | 72°F | Mostly Clear | 0 to 5 mph SW | 14% |
| Monday | 91°F | Mostly Sunny | 0 to 10 mph W | 8% |
| Monday Night | 71°F | Partly Cloudy | 5 mph W | 12% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for South River, NJ
Last spring frost
Apr 15
First fall frost
Oct 26
Growing season
193 days
Hardiness zone
7a
Explore more for South River, NJ: full frost dates · planting calendar · New Jersey frost dates
Climate data from the nearest NOAA station, New Brunswick 3 Se, Nj (3 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.