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.
This Afternoon
65°F
Mostly Cloudy
Mostly cloudy, with a high near 65. South wind around 10 mph.
7-day forecast for Black River
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 65°F | Mostly Cloudy | 10 mph S | 14% |
| Tonight | 55°F | Partly Cloudy | 12 mph S | 4% |
| Wednesday | 74°F | Mostly Sunny | 6 to 9 mph S | 2% |
| Wednesday Night | 58°F | Mostly Cloudy then Rain Showers Likely | 8 to 13 mph S | 66% |
| Thursday | 67°F | Rain Showers | 8 to 14 mph SW | 86% |
| Thursday Night | 50°F | Chance Rain Showers then Mostly Cloudy | 6 mph SW | 37% |
| Friday | 62°F | Slight Chance Rain Showers | 5 mph W | 23% |
| Friday Night | 43°F | Chance Rain Showers | 5 mph N | 28% |
| Saturday | 53°F | Chance Rain Showers | 7 mph NW | 39% |
| Saturday Night | 38°F | Chance Rain Showers | 6 mph W | 39% |
| Sunday | 51°F | Chance Rain Showers | 5 to 10 mph W | 32% |
| Sunday Night | 36°F | Chance Rain Showers | 6 mph W | 35% |
| Monday | 50°F | Chance Rain Showers | 6 to 12 mph W | 35% |
| Monday Night | 36°F | Chance Rain Showers | 8 mph SW | 25% |
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 3, 2026.