Upper Stewartsville, NJ Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Upper Stewartsville, a community in Warren County, New Jersey.
Today
83°F
Mostly Sunny
Mostly sunny, with a high near 83. Wind around 0 mph.
7-day forecast for Upper Stewartsville
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 83°F | Mostly Sunny | 0 mph | 0% |
| Tonight | 63°F | Mostly Cloudy | 0 mph | 1% |
| Wednesday | 82°F | Slight Chance Rain Showers then Chance Showers And Thunderstorms | 0 mph | 46% |
| Wednesday Night | 69°F | Showers And Thunderstorms Likely | 0 mph | 59% |
| Thursday | 87°F | Showers And Thunderstorms Likely | 0 to 5 mph SW | 74% |
| Thursday Night | 70°F | Showers And Thunderstorms Likely then Chance Showers And Thunderstorms | 0 to 5 mph SW | 74% |
| Friday | 87°F | Mostly Sunny then Showers And Thunderstorms Likely | 0 to 5 mph SW | 56% |
| Friday Night | 68°F | Showers And Thunderstorms Likely then Chance Showers And Thunderstorms | 0 to 5 mph W | 56% |
| Saturday | 85°F | Partly Sunny then Chance Showers And Thunderstorms | 0 to 5 mph W | 45% |
| Saturday Night | 67°F | Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms | 0 to 5 mph W | 45% |
| Sunday | 86°F | Mostly Sunny | 0 to 5 mph W | 12% |
| Sunday Night | 68°F | Mostly Clear | 0 to 5 mph SW | 12% |
| Monday | 88°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 0 to 10 mph W | 16% |
| Monday Night | 67°F | Slight Chance Showers And Thunderstorms | 0 to 5 mph W | 16% |
Forecast source: National Weather Service (api.weather.gov) for Upper Stewartsville (40.705, -75.121). Updated through the day.
Growing snapshot for Upper Stewartsville
Last spring frost
Apr 18
First fall frost
Oct 25
Growing season
188 days
Hardiness zone
7a
More local growing data for Upper Stewartsville: nearby ZIP 08886 weather · frost dates · planting calendar · New Jersey frost dates
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Climate data from the nearest NOAA station, Phillipsburg-Easton Brg, Nj (5.2 mi from Upper Stewartsville). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.