Windsor, NJ Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Windsor, a community in Mercer County, New Jersey.
Today
74°F
Mostly Sunny
Mostly sunny, with a high near 74. East wind 5 to 10 mph.
7-day forecast for Windsor
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 74°F | Mostly Sunny | 5 to 10 mph E | 1% |
| Tonight | 57°F | Mostly Cloudy | 0 to 5 mph E | 3% |
| Sunday | 75°F | Rain Showers Likely | 5 to 10 mph SE | 70% |
| Sunday Night | 56°F | Showers And Thunderstorms Likely | 5 to 10 mph W | 72% |
| Monday | 69°F | Chance Rain Showers | 5 to 10 mph NE | 47% |
| Monday Night | 51°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 | 15 mph NE | 33% |
| Thursday | 63°F | Chance Rain Showers | 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) for Windsor (40.247, -74.581). Updated through the day.
Growing snapshot for Windsor
Last spring frost
Apr 25
First fall frost
Oct 16
Growing season
173 days
Hardiness zone
7a
More local growing data for Windsor: nearby ZIP 08561 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
Trenton
Twin Rivers
White Horse
Yardville
Climate data from the nearest NOAA station, Hightstown 2 W, Nj (1.6 mi from Windsor). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.