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.
Tonight
41°F
Mostly Cloudy
Mostly cloudy, with a low around 41. Northeast wind 5 to 8 mph.
7-day forecast for Black River
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 41°F | Mostly Cloudy | 5 to 8 mph NE | 0% |
| Saturday | 64°F | Mostly Sunny | 5 mph NE | 0% |
| Saturday Night | 47°F | Mostly Cloudy then Chance Rain Showers | 5 mph E | 48% |
| Sunday | 62°F | Rain Showers | 7 mph E | 76% |
| Sunday Night | 45°F | Chance Rain Showers then Partly Cloudy | 3 to 7 mph NE | 30% |
| Monday | 60°F | Mostly Sunny | 8 to 12 mph NE | 0% |
| Monday Night | 42°F | Mostly Cloudy | 6 to 12 mph NE | 1% |
| Tuesday | 63°F | Partly Sunny | 7 to 10 mph NE | 2% |
| Tuesday Night | 43°F | Partly Cloudy | 5 to 10 mph NE | 4% |
| Wednesday | 63°F | Mostly Sunny | 7 mph E | 9% |
| Wednesday Night | 46°F | Mostly Cloudy then Slight Chance Rain Showers | 6 mph E | 24% |
| Thursday | 63°F | Slight Chance Rain Showers | 7 mph E | 24% |
| Thursday Night | 48°F | Chance Rain Showers | 3 to 7 mph E | 25% |
| Friday | 66°F | Slight Chance Rain Showers then Partly Sunny | 5 to 8 mph NE | 19% |
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
Nearby towns & communities
Adams
Adams Center
Alexandria Bay
Antwerp
Belleville
Brownville
Calcium
Cape Vincent
Carthage
Chaumont
Clayton
Deferiet
Depauville
Dexter
Ellisburg
Evans Mills
Felts Mills
Fishers Landing
Fort Drum
Glen Park
Great Bend
Henderson
Herrings
La Fargeville
Lorraine
Mannsville
Oxbow
Pamelia Center
Philadelphia
Pierrepont Manor
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 Sep 19, 2026.