Monmouth Junction, NJ Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Monmouth Junction, a community in Middlesex County, New Jersey.
Overnight
63°F
Partly Cloudy
Partly cloudy, with a low around 63. North wind around 0 mph.
7-day forecast for Monmouth Junction
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 63°F | Partly Cloudy | 0 mph | 0% |
| Tuesday | 84°F | Mostly Sunny | 0 mph | 0% |
| Tuesday Night | 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 mph | 56% |
| Thursday | 89°F | Slight Chance Rain Showers then Chance Showers And Thunderstorms | 0 to 5 mph SW | 32% |
| Thursday Night | 72°F | Chance Showers And Thunderstorms | 0 to 5 mph SW | 33% |
| Friday | 90°F | Mostly Sunny then Chance Showers And Thunderstorms | 0 to 5 mph SW | 43% |
| Friday Night | 70°F | Chance Showers And Thunderstorms | 0 to 5 mph SW | 45% |
| 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 SW | 14% |
| Monday | 90°F | Sunny | 0 to 5 mph W | 9% |
Forecast source: National Weather Service (api.weather.gov) for Monmouth Junction (40.376, -74.558). Updated through the day.
Growing snapshot for Monmouth Junction
Last spring frost
Apr 15
First fall frost
Oct 26
Growing season
193 days
Hardiness zone
7a
More local growing data for Monmouth Junction: nearby ZIP 08852 weather · frost dates · planting calendar · New Jersey frost dates
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New Brunswick
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Climate data from the nearest NOAA station, New Brunswick 3 Se, Nj (8.6 mi from Monmouth Junction). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.