Pennington, NJ Weather & Growing Conditions
Overnight
56°F
Mostly Cloudy
Mostly cloudy, with a low around 56. Northeast wind 5 to 10 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 56°F | Mostly Cloudy | 5 to 10 mph NE | 0% |
| Saturday | 74°F | Partly Sunny | 5 to 10 mph E | 1% |
| Saturday Night | 57°F | Mostly Cloudy | 0 to 5 mph E | 6% |
| Sunday | 73°F | Rain Showers | 5 to 10 mph SE | 83% |
| Sunday Night | 56°F | Slight Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 5 to 10 mph W | 69% |
| Monday | 68°F | Chance Rain Showers | 5 to 10 mph NE | 41% |
| Monday Night | 50°F | Chance Rain Showers | 5 to 10 mph NE | 30% |
| Tuesday | 63°F | Chance Rain Showers | 10 mph NE | 35% |
| Tuesday Night | 50°F | Chance Rain Showers | 10 to 15 mph NE | 34% |
| Wednesday | 63°F | Slight Chance Rain Showers | 15 mph NE | 24% |
| Wednesday Night | 50°F | Chance Rain Showers | 10 to 15 mph NE | 31% |
| Thursday | 62°F | Chance Rain Showers | 10 to 15 mph NE | 33% |
| Thursday Night | 49°F | Chance Rain Showers | 10 to 15 mph N | 33% |
| Friday | 65°F | Chance Rain Showers | 10 mph N | 32% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Pennington, NJ
Last spring frost
Apr 10
First fall frost
Nov 1
Growing season
202 days
Hardiness zone
7a
Explore more for Pennington, NJ: full frost dates · planting calendar · New Jersey frost dates
Climate data from the nearest NOAA station, Trenton Mercer Co Ap, Nj (3.8 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.