Plainfield, NJ Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Plainfield, a city in Union County, New Jersey.
This Afternoon
72°F
Partly Sunny
Partly sunny. High near 72, with temperatures falling to around 70 in the afternoon. Southeast wind around 6 mph.
7-day forecast for Plainfield
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 72°F | Partly Sunny | 6 mph SE | 1% |
| Tonight | 60°F | Mostly Cloudy | 2 to 6 mph E | 14% |
| Sunday | 73°F | Rain Showers then Rain Likely | 3 to 7 mph SE | 84% |
| Sunday Night | 58°F | Rain Likely then Rain Showers Likely | 2 to 8 mph W | 81% |
| Monday | 68°F | Chance Rain Showers | 6 to 9 mph NE | 26% |
| Monday Night | 54°F | Chance Rain Showers | 5 to 8 mph NE | 30% |
| Tuesday | 65°F | Chance Rain Showers | 10 mph NE | 32% |
| Tuesday Night | 52°F | Chance Rain Showers then Mostly Cloudy | 8 to 12 mph NE | 32% |
| Wednesday | 64°F | Mostly Cloudy then Slight Chance Rain Showers | 14 mph NE | 19% |
| Wednesday Night | 52°F | Slight Chance Rain Showers | 13 mph NE | 21% |
| Thursday | 63°F | Chance Rain Showers | 10 to 14 mph NE | 28% |
| Thursday Night | 51°F | Chance Rain Showers | 10 to 14 mph NE | 35% |
| Friday | 65°F | Chance Rain Showers | 10 to 15 mph N | 35% |
| Friday Night | 53°F | Chance Rain Showers | 9 to 13 mph N | 35% |
Forecast source: National Weather Service (api.weather.gov) for Plainfield (40.615, -74.416). Updated through the day.
Growing snapshot for Plainfield
Last spring frost
Apr 11
First fall frost
Oct 28
Growing season
198 days
Hardiness zone
7a
More local growing data for Plainfield: nearby ZIP 07060 weather · frost dates · planting calendar · New Jersey frost dates
Nearby towns & communities
Chatham
Connecticut Farms
Cranford
Elizabeth
Fanwood
Garwood
Kean University
Kenilworth
Linden
Mountainside
New Providence
North Plainfield
Rahway
Roselle
Roselle Park
Summit
Union
Vauxhall
Westfield
Climate data from the nearest NOAA station, Plainfield, Nj (1.4 mi from Plainfield). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.