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
76°F
Mostly Sunny
Mostly sunny, with a high near 76. South wind around 9 mph.
7-day forecast for Black River
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 76°F | Mostly Sunny | 9 mph S | 0% |
| Tonight | 58°F | Mostly Cloudy then Rain Showers Likely | 9 to 17 mph S | 71% |
| Thursday | 67°F | Rain Showers | 7 to 15 mph SW | 91% |
| Thursday Night | 49°F | Mostly Cloudy | 6 mph SW | 6% |
| Friday | 62°F | Mostly Cloudy | 5 mph SW | 11% |
| Friday Night | 42°F | Chance Rain Showers | 5 mph NE | 31% |
| Saturday | 52°F | Chance Rain Showers | 8 mph N | 48% |
| Saturday Night | 36°F | Chance Rain Showers | 7 mph NW | 48% |
| Sunday | 50°F | Chance Rain Showers | 5 to 12 mph W | 38% |
| Sunday Night | 34°F | Chance Rain Showers | 8 mph W | 35% |
| Monday | 50°F | Chance Rain Showers | 6 to 12 mph W | 35% |
| Monday Night | 34°F | Slight Chance Rain Showers | 5 to 8 mph SW | 20% |
| Tuesday | 51°F | Chance Rain Showers | 8 to 15 mph SW | 43% |
| Tuesday Night | 32°F | Chance Rain Showers | 6 to 10 mph W | 43% |
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 Nov 4, 2026.