Princeton, NJ Weather & Growing Conditions
This Afternoon
74°F
Sunny
Sunny, with a high near 74. 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 mph SW | 42% |
| Thursday Night | 60°F | Light Rain | 0 to 5 mph SW | 81% |
| Friday | 70°F | Light Rain | 0 mph | 82% |
| Friday Night | 50°F | Light Rain | 0 to 5 mph NW | 82% |
| Saturday | 65°F | Mostly Sunny | 5 mph W | 8% |
| Saturday Night | 42°F | Slight Chance Light Rain | 5 mph W | 15% |
| Sunday | 60°F | Mostly Sunny | 5 mph W | 6% |
| Sunday Night | 39°F | Partly Cloudy | 5 mph W | 6% |
| Monday | 58°F | Sunny | 5 to 10 mph W | 7% |
| Monday Night | 37°F | Mostly Clear | 5 mph W | 7% |
| Tuesday | 62°F | Sunny | 5 to 10 mph W | 4% |
| Tuesday Night | 37°F | Mostly Clear | 5 mph W | 0% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Princeton, NJ
Last spring frost
Apr 25
First fall frost
Oct 16
Growing season
173 days
Hardiness zone
7a
Explore more for Princeton, NJ: full frost dates · planting calendar · New Jersey frost dates
Climate data from the nearest NOAA station, Hightstown 2 W, Nj (8.4 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.