Hopewell, NJ Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Hopewell, a borough in Mercer County, New Jersey.
Today
85°F
Mostly Sunny
Mostly sunny, with a high near 85. Northeast wind around 0 mph.
7-day forecast for Hopewell
| 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 | 49% |
| Wednesday Night | 70°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 0 to 5 mph S | 68% |
| Thursday | 90°F | Slight Chance Rain Showers then Chance Showers And Thunderstorms | 0 to 5 mph SW | 31% |
| Thursday Night | 72°F | Chance Showers And Thunderstorms | 0 to 5 mph SW | 39% |
| Friday | 90°F | Mostly Sunny then Chance Showers And Thunderstorms | 0 to 5 mph SW | 46% |
| Friday Night | 70°F | Chance Showers And Thunderstorms | 0 to 5 mph SW | 46% |
| Saturday | 88°F | Partly Sunny then Chance Showers And Thunderstorms | 0 to 5 mph W | 37% |
| Saturday Night | 69°F | Chance Showers And Thunderstorms | 0 to 5 mph W | 37% |
| Sunday | 88°F | Mostly Sunny | 0 to 5 mph W | 14% |
| Sunday Night | 70°F | Mostly Clear | 0 to 5 mph W | 14% |
| Monday | 91°F | Sunny | 5 to 10 mph W | 10% |
| Monday Night | 69°F | Partly Cloudy | 5 mph W | 14% |
Forecast source: National Weather Service (api.weather.gov) for Hopewell (40.389, -74.764). Updated through the day.
Growing snapshot for Hopewell
Last spring frost
Apr 16
First fall frost
Oct 27
Growing season
192 days
Hardiness zone
7a
More local growing data for Hopewell: nearby ZIP 08525 weather · frost dates · planting calendar · New Jersey frost dates
Nearby towns & communities
Allentown
Groveville
Hamilton Square
Hightstown
Lawrenceville
Mercerville
Pennington
Princeton
Robbinsville Center
The College of New Jersey
Titusville
Trenton
Twin Rivers
White Horse
Windsor
Yardville
Climate data from the nearest NOAA station, Wertsville 4 Ne, Nj (3.7 mi from Hopewell). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.