Upper Greenwood Lake, NJ Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Upper Greenwood Lake, a community in Passaic County, New Jersey.
This Afternoon
67°F
Partly Sunny
Partly sunny, with a high near 67. Southeast wind around 2 mph.
7-day forecast for Upper Greenwood Lake
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 67°F | Partly Sunny | 2 mph SE | 0% |
| Tonight | 54°F | Mostly Cloudy then Chance Rain Showers | 1 to 6 mph SE | 46% |
| Sunday | 65°F | Rain Showers then Rain | 7 mph SE | 99% |
| Sunday Night | 53°F | Rain then Rain Showers Likely | 2 to 9 mph NW | 82% |
| Monday | 63°F | Partly Sunny | 6 to 9 mph NE | 12% |
| Monday Night | 47°F | Mostly Cloudy then Chance Rain Showers | 7 mph NE | 29% |
| Tuesday | 59°F | Chance Rain Showers | 7 mph NE | 29% |
| Tuesday Night | 46°F | Slight Chance Rain Showers then Mostly Cloudy | 5 to 10 mph NE | 24% |
| Wednesday | 60°F | Partly Sunny | 7 to 10 mph NE | 7% |
| Wednesday Night | 46°F | Slight Chance Rain Showers | 6 to 13 mph NE | 20% |
| Thursday | 58°F | Chance Rain Showers | 7 to 12 mph NE | 26% |
| Thursday Night | 46°F | Chance Rain Showers | 7 to 13 mph NE | 33% |
| Friday | 60°F | Chance Rain Showers | 8 to 13 mph N | 34% |
| Friday Night | 48°F | Chance Rain Showers | 8 to 13 mph N | 34% |
Forecast source: National Weather Service (api.weather.gov) for Upper Greenwood Lake (41.186, -74.378). Updated through the day.
Growing snapshot for Upper Greenwood Lake
Last spring frost
Apr 19
First fall frost
Oct 23
Growing season
188 days
Hardiness zone
6b
More local growing data for Upper Greenwood Lake: nearby ZIP 07421 weather · frost dates · planting calendar · New Jersey frost dates
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Totowa
Wanaque
William Paterson University of New Jersey
Woodland Park
Climate data from the nearest NOAA station, Wanaque Raymond Dam, Nj (9.5 mi from Upper Greenwood Lake). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.