Black River Falls, WI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Black River Falls, a city in Jackson County, Wisconsin.
Tonight
50°F
Showers And Thunderstorms
Showers and thunderstorms. Cloudy. Low around 50, with temperatures rising to around 52 overnight. East wind around 12 mph, with gusts as high as 26 mph. Chance of precipitation is 90%. New rainfall amounts between 1 and 2 inches possible.
7-day forecast for Black River Falls
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 50°F | Showers And Thunderstorms | 12 mph E | 93% |
| Saturday | 61°F | Showers And Thunderstorms | 10 mph E | 79% |
| Saturday Night | 49°F | Chance Showers And Thunderstorms then Cloudy | 10 mph NE | 45% |
| Sunday | 69°F | Partly Sunny | 6 to 10 mph NE | 8% |
| Sunday Night | 42°F | Mostly Cloudy | 7 mph NE | 2% |
| Monday | 64°F | Mostly Cloudy | 5 to 9 mph E | 9% |
| Monday Night | 40°F | Mostly Cloudy | 2 to 7 mph E | 12% |
| Tuesday | 64°F | Mostly Sunny | 3 to 7 mph E | 12% |
| Tuesday Night | 39°F | Partly Cloudy | 0 to 3 mph E | 3% |
| Wednesday | 67°F | Sunny | 1 to 5 mph E | 1% |
| Wednesday Night | 42°F | Partly Cloudy | 2 mph NE | 3% |
| Thursday | 70°F | Mostly Sunny | 2 mph S | 7% |
| Thursday Night | 44°F | Partly Cloudy | 1 mph NE | 7% |
| Friday | 72°F | Mostly Sunny | 0 to 3 mph NE | 3% |
Forecast source: National Weather Service (api.weather.gov) for Black River Falls (44.298, -90.843). Updated through the day.
Growing snapshot for Black River Falls
Last spring frost
May 9
First fall frost
Oct 1
Growing season
143 days
Hardiness zone
4b
More local growing data for Black River Falls: nearby ZIP 54615 weather · frost dates · planting calendar · Wisconsin frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Blair, Wi (22.1 mi from Black River Falls). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.