Trenton, NJ Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Trenton, a city in Mercer County, New Jersey.
Tonight
60°F
Mostly Cloudy
Mostly cloudy, with a low around 60. East wind 0 to 5 mph.
7-day forecast for Trenton
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 60°F | Mostly Cloudy | 0 to 5 mph E | 5% |
| Sunday | 77°F | Rain Showers Likely | 5 to 10 mph SE | 68% |
| Sunday Night | 59°F | Rain Showers Likely | 5 mph W | 68% |
| Monday | 70°F | Partly Sunny then Chance Rain Showers | 5 to 10 mph NE | 30% |
| Monday Night | 54°F | Chance Rain Showers | 5 mph NE | 30% |
| Tuesday | 67°F | Chance Rain Showers | 5 to 10 mph NE | 36% |
| Tuesday Night | 52°F | Chance Rain Showers then Mostly Cloudy | 5 to 10 mph NE | 36% |
| Wednesday | 65°F | Slight Chance Rain Showers | 10 to 15 mph NE | 21% |
| Wednesday Night | 53°F | Slight Chance Rain Showers | 10 mph NE | 22% |
| Thursday | 64°F | Chance Rain Showers | 10 to 15 mph NE | 29% |
| Thursday Night | 51°F | Chance Rain Showers | 10 mph NE | 36% |
| Friday | 67°F | Chance Rain Showers | 10 mph N | 36% |
| Friday Night | 52°F | Chance Rain Showers | 5 to 10 mph N | 35% |
| Saturday | 70°F | Chance Rain Showers | 10 mph N | 30% |
Forecast source: National Weather Service (api.weather.gov) for Trenton (40.224, -74.764). Updated through the day.
Growing snapshot for Trenton
Last spring frost
Apr 17
First fall frost
Oct 28
Growing season
192 days
More local growing data for Trenton: nearby ZIP 08608 weather · frost dates · planting calendar · New Jersey frost dates
Nearby towns & communities
Allentown
Groveville
Hamilton Square
Hightstown
Hopewell
Lawrenceville
Mercerville
Pennington
Princeton
Robbinsville Center
The College of New Jersey
Titusville
Twin Rivers
White Horse
Windsor
Yardville
Climate data from the nearest NOAA station, Trenton State College, Nj (3.8 mi from Trenton). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.