Helmetta, NJ Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Helmetta, a borough in Middlesex County, New Jersey.
This Afternoon
73°F
Partly Sunny
Partly sunny, with a high near 73. East wind around 5 mph.
7-day forecast for Helmetta
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 73°F | Partly Sunny | 5 mph E | 1% |
| Tonight | 59°F | Mostly Cloudy | 0 to 5 mph SE | 5% |
| Sunday | 76°F | Rain Showers Likely | 5 mph SE | 74% |
| Sunday Night | 58°F | Rain Showers Likely | 5 mph W | 70% |
| Monday | 69°F | Chance Rain Showers | 5 to 10 mph NE | 30% |
| Monday Night | 53°F | Chance Rain Showers | 5 to 10 mph NE | 30% |
| Tuesday | 66°F | Chance Rain Showers | 10 mph NE | 34% |
| Tuesday Night | 52°F | Chance Rain Showers then Mostly Cloudy | 5 to 10 mph NE | 34% |
| Wednesday | 65°F | Slight Chance Rain Showers | 10 to 15 mph NE | 21% |
| Wednesday Night | 52°F | Slight Chance Rain Showers | 10 mph NE | 21% |
| Thursday | 64°F | Chance Rain Showers | 10 mph NE | 30% |
| Thursday Night | 51°F | Chance Rain Showers | 10 to 15 mph NE | 37% |
| Friday | 66°F | Chance Rain Showers | 10 to 15 mph N | 37% |
| Friday Night | 51°F | Chance Rain Showers | 5 to 10 mph N | 37% |
Forecast source: National Weather Service (api.weather.gov) for Helmetta (40.378, -74.423). Updated through the day.
Growing snapshot for Helmetta
Last spring frost
Apr 15
First fall frost
Oct 26
Growing season
193 days
Hardiness zone
7a
More local growing data for Helmetta: nearby ZIP 08828 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 (6.5 mi from Helmetta). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.