Perth Amboy, NJ Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Perth Amboy, a city in Middlesex County, New Jersey.
Tonight
61°F
Mostly Cloudy
Mostly cloudy. Low around 61, with temperatures rising to around 63 overnight. Southeast wind around 7 mph.
7-day forecast for Perth Amboy
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 61°F | Mostly Cloudy | 7 mph SE | 5% |
| Sunday | 75°F | Rain Showers | 6 to 9 mph SE | 79% |
| Sunday Night | 59°F | Showers And Thunderstorms Likely | 5 to 9 mph W | 74% |
| Monday | 70°F | Chance Rain Showers | 7 to 10 mph NE | 29% |
| Monday Night | 55°F | Chance Rain Showers | 6 to 9 mph NE | 29% |
| Tuesday | 66°F | Chance Rain Showers | 12 mph NE | 32% |
| Tuesday Night | 54°F | Chance Rain Showers then Mostly Cloudy | 13 mph NE | 32% |
| Wednesday | 65°F | Slight Chance Rain Showers | 13 to 16 mph NE | 20% |
| Wednesday Night | 54°F | Slight Chance Rain Showers | 16 mph NE | 22% |
| Thursday | 64°F | Chance Rain Showers | 16 mph NE | 31% |
| Thursday Night | 53°F | Chance Rain Showers | 16 mph NE | 37% |
| Friday | 66°F | Chance Rain Showers | 13 to 16 mph N | 38% |
| Friday Night | 54°F | Chance Rain Showers | 14 mph N | 37% |
| Saturday | 69°F | Chance Rain Showers | 10 to 14 mph N | 30% |
Forecast source: National Weather Service (api.weather.gov) for Perth Amboy (40.520, -74.271). Updated through the day.
Growing snapshot for Perth Amboy
Last spring frost
Apr 15
First fall frost
Oct 26
Growing season
193 days
Hardiness zone
7b
More local growing data for Perth Amboy: nearby ZIP 08861 weather · frost dates · planting calendar · New Jersey frost dates
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Metuchen
Middlesex
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New Brunswick
Old Bridge
Climate data from the nearest NOAA station, New Brunswick 3 Se, Nj (8.5 mi from Perth Amboy). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.