Black River, NY Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Black River, a village in Jefferson County, New York.
Today
78°F
Sunny
Sunny, with a high near 78. West wind 5 to 9 mph.
7-day forecast for Black River
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 78°F | Sunny | 5 to 9 mph W | 0% |
| Tonight | 61°F | Clear | 2 to 6 mph S | 0% |
| Wednesday | 85°F | Sunny | 8 mph S | 0% |
| Wednesday Night | 68°F | Mostly Cloudy then Slight Chance Rain Showers | 3 to 7 mph S | 24% |
| Thursday | 84°F | Showers And Thunderstorms Likely | 8 mph S | 58% |
| Thursday Night | 67°F | Showers And Thunderstorms Likely | 6 mph SW | 58% |
| Friday | 81°F | Chance Rain Showers then Chance Showers And Thunderstorms | 5 to 8 mph SW | 41% |
| Friday Night | 64°F | Chance Showers And Thunderstorms | 6 mph SW | 48% |
| Saturday | 81°F | Chance Showers And Thunderstorms | 5 to 9 mph SW | 48% |
| Saturday Night | 66°F | Slight Chance Showers And Thunderstorms | 5 to 8 mph SW | 21% |
| Sunday | 82°F | Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms | 7 to 13 mph SW | 20% |
| Sunday Night | 66°F | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 10 mph SW | 47% |
| Monday | 80°F | Chance Rain Showers | 9 to 14 mph SW | 54% |
| Monday Night | 62°F | Chance Showers And Thunderstorms | 5 to 12 mph SW | 54% |
Forecast source: National Weather Service (api.weather.gov) for Black River (44.010, -75.796). Updated through the day.
Growing snapshot for Black River
Last spring frost
May 2
First fall frost
Oct 13
Growing season
163 days
Hardiness zone
5a
More local growing data for Black River: nearby ZIP 13603 weather · frost dates · planting calendar · New York frost dates
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Climate data from the nearest NOAA station, Watertown, Ny (5.2 mi from Black River). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.