Pennington, NJ Weather & Growing Conditions
This Afternoon
74°F
Sunny
Sunny. High near 74, with temperatures falling to around 68 in the afternoon. South wind around 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 74°F | Sunny | 5 mph S | 1% |
| Tonight | 57°F | Mostly Cloudy | 5 mph S | 1% |
| Thursday | 73°F | Chance Light Rain | 5 to 10 mph S | 47% |
| Thursday Night | 60°F | Light Rain | 0 to 5 mph SW | 81% |
| Friday | 70°F | Light Rain | 0 mph | 81% |
| Friday Night | 50°F | Light Rain | 0 to 5 mph NW | 81% |
| Saturday | 65°F | Mostly Sunny | 5 to 10 mph W | 8% |
| Saturday Night | 41°F | Slight Chance Light Rain | 5 mph W | 15% |
| Sunday | 60°F | Mostly Sunny | 5 to 10 mph W | 5% |
| Sunday Night | 37°F | Partly Cloudy | 5 mph W | 7% |
| Monday | 58°F | Sunny | 5 to 10 mph W | 7% |
| Monday Night | 36°F | Mostly Clear | 5 mph W | 6% |
| Tuesday | 62°F | Sunny | 5 to 10 mph W | 4% |
| Tuesday Night | 36°F | Mostly Clear | 5 mph W | 0% |
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 Nov 4, 2026.