Pennington, NJ Weather & Growing Conditions
Today
85°F
Mostly Sunny
Mostly sunny, with a high near 85. Northeast wind around 0 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 85°F | Mostly Sunny | 0 mph | 0% |
| Tonight | 64°F | Mostly Cloudy | 0 mph | 2% |
| Wednesday | 84°F | Partly Sunny then Chance Showers And Thunderstorms | 0 to 5 mph E | 48% |
| Wednesday Night | 70°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 0 to 5 mph S | 69% |
| Thursday | 89°F | Slight Chance Rain Showers then Chance Showers And Thunderstorms | 0 to 10 mph SW | 30% |
| Thursday Night | 72°F | Chance Showers And Thunderstorms | 5 mph SW | 37% |
| Friday | 90°F | Mostly Sunny then Chance Showers And Thunderstorms | 5 mph SW | 45% |
| Friday Night | 70°F | Chance Showers And Thunderstorms | 0 to 5 mph SW | 47% |
| Saturday | 88°F | Partly Sunny then Chance Showers And Thunderstorms | 0 to 5 mph W | 38% |
| Saturday Night | 69°F | Chance Showers And Thunderstorms | 0 to 5 mph W | 38% |
| Sunday | 88°F | Mostly Sunny | 0 to 5 mph W | 14% |
| Sunday Night | 70°F | Partly Cloudy | 0 to 5 mph W | 14% |
| Monday | 90°F | Sunny | 0 to 10 mph W | 10% |
| Monday Night | 70°F | Slight Chance Showers And Thunderstorms | 5 mph W | 15% |
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 Aug 4, 2026.