Princeton Junction, NJ Weather & Growing Conditions
Today
74°F
Mostly Sunny
Mostly sunny, with a high near 74. East wind around 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 74°F | Mostly Sunny | 5 mph E | 1% |
| Tonight | 56°F | Mostly Cloudy | 0 to 5 mph E | 4% |
| Sunday | 75°F | Rain Showers | 5 to 10 mph SE | 75% |
| Sunday Night | 56°F | Showers And Thunderstorms Likely | 5 to 10 mph W | 71% |
| Monday | 69°F | Chance Rain Showers | 5 to 10 mph NE | 45% |
| Monday Night | 50°F | Chance Rain Showers | 5 to 10 mph NE | 30% |
| Tuesday | 64°F | Chance Rain Showers | 10 mph NE | 36% |
| Tuesday Night | 50°F | Chance Rain Showers | 10 to 15 mph NE | 35% |
| Wednesday | 64°F | Chance Rain Showers | 15 mph NE | 26% |
| Wednesday Night | 50°F | Chance Rain Showers | 10 to 15 mph NE | 32% |
| Thursday | 62°F | Chance Rain Showers | 10 to 15 mph NE | 34% |
| Thursday Night | 49°F | Chance Rain Showers | 10 mph N | 34% |
| Friday | 66°F | Chance Rain Showers | 10 mph N | 33% |
| Friday Night | 49°F | Chance Rain Showers | 5 to 10 mph N | 29% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Princeton Junction, NJ
Last spring frost
Apr 25
First fall frost
Oct 16
Growing season
173 days
Hardiness zone
7a
Explore more for Princeton Junction, NJ: full frost dates · planting calendar · New Jersey frost dates
Climate data from the nearest NOAA station, Hightstown 2 W, Nj (3.2 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.