Sewaren, NJ Weather & Growing Conditions
This Afternoon
72°F
Mostly Sunny
Mostly sunny. High near 72, with temperatures falling to around 70 in the afternoon. East wind around 8 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 72°F | Mostly Sunny | 8 mph E | 1% |
| Tonight | 61°F | Mostly Cloudy | 3 to 8 mph SE | 4% |
| Sunday | 73°F | Rain Showers | 5 to 9 mph SE | 85% |
| Sunday Night | 59°F | Showers And Thunderstorms | 5 to 10 mph W | 77% |
| Monday | 69°F | Chance Rain Showers | 8 to 12 mph N | 40% |
| Monday Night | 54°F | Chance Rain Showers | 7 to 10 mph NE | 26% |
| Tuesday | 64°F | Chance Rain Showers | 13 mph NE | 31% |
| Tuesday Night | 53°F | Chance Rain Showers | 13 mph NE | 28% |
| Wednesday | 65°F | Slight Chance Rain Showers | 16 mph NE | 24% |
| Wednesday Night | 53°F | Chance Rain Showers | 15 mph NE | 32% |
| Thursday | 64°F | Chance Rain Showers | 16 mph NE | 33% |
| Thursday Night | 52°F | Chance Rain Showers | 10 to 16 mph NE | 36% |
| Friday | 66°F | Chance Rain Showers | 13 mph N | 34% |
| Friday Night | 53°F | Chance Rain Showers | 13 mph N | 31% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Sewaren, NJ
Last spring frost
Apr 11
First fall frost
Oct 28
Growing season
198 days
Hardiness zone
7b
Explore more for Sewaren, NJ: full frost dates · planting calendar · New Jersey frost dates
Climate data from the nearest NOAA station, Plainfield, Nj (8.6 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.