South Plainfield, NJ Weather & Growing Conditions
Tonight
58°F
Partly Cloudy
Partly cloudy, with a low around 58. North wind 5 to 10 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 58°F | Partly Cloudy | 5 to 10 mph N | 1% |
| Saturday | 71°F | Mostly Sunny | 5 to 10 mph E | 1% |
| Saturday Night | 61°F | Mostly Cloudy then Patchy Fog | 5 mph SE | 24% |
| Sunday | 72°F | Showers And Thunderstorms | 5 to 10 mph SE | 83% |
| Sunday Night | 60°F | Showers And Thunderstorms | 5 to 10 mph W | 85% |
| Monday | 67°F | Chance Rain Showers | 10 mph NE | 43% |
| Monday Night | 56°F | Chance Rain Showers | 5 to 10 mph NE | 28% |
| Tuesday | 63°F | Chance Rain Showers | 10 to 15 mph NE | 31% |
| Tuesday Night | 53°F | Chance Rain Showers | 10 mph NE | 30% |
| Wednesday | 62°F | Chance Rain Showers | 10 to 15 mph NE | 27% |
| Wednesday Night | 53°F | Chance Rain Showers | 10 to 15 mph NE | 41% |
| Thursday | 63°F | Chance Rain Showers | 10 to 15 mph NE | 36% |
| Thursday Night | 53°F | Chance Showers And Thunderstorms | 10 mph NE | 34% |
| Friday | 67°F | Chance Rain Showers | 10 mph N | 29% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for South Plainfield, NJ
Last spring frost
Apr 11
First fall frost
Oct 28
Growing season
198 days
Hardiness zone
7a
Explore more for South Plainfield, NJ: full frost dates · planting calendar · New Jersey frost dates
Climate data from the nearest NOAA station, Plainfield, Nj (2.7 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.