Black River Falls, WI Weather & Growing Conditions
Today
62°F
Showers And Thunderstorms
Rain showers likely before 1pm, then showers and thunderstorms. Cloudy, with a high near 62. East wind around 7 mph, with gusts as high as 18 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 62°F | Showers And Thunderstorms | 7 mph E | 75% |
| Tonight | 49°F | Chance Rain Showers then Cloudy | 3 to 7 mph NE | 37% |
| Sunday | 67°F | Partly Sunny | 5 to 9 mph NE | 2% |
| Sunday Night | 41°F | Mostly Cloudy | 7 mph NE | 2% |
| Monday | 64°F | Mostly Cloudy | 5 to 8 mph E | 4% |
| Monday Night | 40°F | Mostly Cloudy | 2 to 6 mph E | 4% |
| Tuesday | 64°F | Mostly Sunny | 3 to 7 mph E | 4% |
| Tuesday Night | 39°F | Mostly Clear | 3 mph E | 2% |
| Wednesday | 68°F | Sunny | 1 to 5 mph E | 1% |
| Wednesday Night | 41°F | Mostly Clear | 2 mph NE | 2% |
| Thursday | 69°F | Mostly Sunny | 0 to 3 mph NE | 5% |
| Thursday Night | 43°F | Partly Cloudy | 1 mph NE | 3% |
| Friday | 72°F | Mostly Sunny | 0 to 3 mph E | 3% |
| Friday Night | 44°F | Partly Cloudy | 2 mph E | 3% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Black River Falls, WI
Last spring frost
May 9
First fall frost
Oct 1
Growing season
143 days
Hardiness zone
4b
Explore more for Black River Falls, WI: full frost dates · planting calendar · Wisconsin frost dates
Climate data from the nearest NOAA station, Blair, Wi (22.1 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.