South Plainfield, NJ Weather & Growing Conditions
Overnight
49°F
Mostly Clear
Mostly clear, with a low around 49. Southwest wind around 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 49°F | Mostly Clear | 5 mph SW | 3% |
| Wednesday | 74°F | Patchy Fog then Sunny | 0 to 5 mph SW | 3% |
| Wednesday Night | 57°F | Mostly Cloudy | 5 mph S | 2% |
| Thursday | 73°F | Chance Light Rain | 5 to 10 mph S | 38% |
| Thursday Night | 61°F | Light Rain Likely | 0 to 5 mph SW | 71% |
| Friday | 69°F | Light Rain | 0 to 5 mph SW | 77% |
| Friday Night | 53°F | Light Rain Likely | 0 to 5 mph NW | 77% |
| Saturday | 66°F | Chance Light Rain | 5 mph NW | 44% |
| Saturday Night | 41°F | Slight Chance Light Rain | 5 mph NW | 15% |
| Sunday | 61°F | Mostly Sunny | 5 mph W | 12% |
| Sunday Night | 39°F | Partly Cloudy then Slight Chance Light Rain | 5 mph W | 18% |
| Monday | 61°F | Slight Chance Light Rain | 5 to 10 mph NW | 23% |
| Monday Night | 38°F | Slight Chance Light Rain | 5 mph W | 22% |
| Tuesday | 62°F | Slight Chance Light Rain then Mostly Sunny | 5 to 10 mph W | 16% |
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 (2.1 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.