Hopewell, NJ Weather & Growing Conditions

Local forecast, frost dates, hardiness zone and planting guidance for Hopewell, a borough in Mercer County, New Jersey.

This Afternoon

74°F

Mostly Cloudy

Mostly cloudy, with a high near 74. East wind around 5 mph.

7-day forecast for Hopewell

When	Temp	Forecast	Wind	Precip
This Afternoon	74°F	Mostly Cloudy	5 mph E	1%
Tonight	59°F	Mostly Cloudy	0 to 5 mph E	7%
Sunday	75°F	Showers And Thunderstorms	5 mph SE	82%
Sunday Night	57°F	Showers And Thunderstorms Likely	0 to 5 mph W	65%
Monday	70°F	Partly Sunny then Chance Rain Showers	5 to 10 mph NE	28%
Monday Night	52°F	Chance Rain Showers	5 to 10 mph NE	30%
Tuesday	65°F	Chance Rain Showers	10 mph NE	35%
Tuesday Night	51°F	Chance Rain Showers then Mostly Cloudy	5 to 10 mph NE	35%
Wednesday	64°F	Slight Chance Rain Showers	10 to 15 mph NE	20%
Wednesday Night	51°F	Slight Chance Rain Showers	10 to 15 mph NE	21%
Thursday	63°F	Chance Rain Showers	10 to 15 mph NE	28%
Thursday Night	50°F	Chance Rain Showers	10 to 15 mph NE	35%
Friday	66°F	Chance Rain Showers	10 to 15 mph N	35%
Friday Night	50°F	Chance Rain Showers	10 mph N	35%

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

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

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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 Sep 20, 2026.