Black River Falls, WI Weather & Growing Conditions
This Afternoon
67°F
Rain Showers
Rain showers. Cloudy. High near 67, with temperatures falling to around 65 in the afternoon. South wind around 8 mph, with gusts as high as 21 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 |
|---|---|---|---|---|
| This Afternoon | 67°F | Rain Showers | 8 mph S | 82% |
| Tonight | 55°F | Rain Showers | 7 mph SE | 96% |
| Wednesday | 59°F | Rain Showers | 6 to 12 mph S | 86% |
| Wednesday Night | 43°F | Rain Showers | 8 to 12 mph SW | 98% |
| Thursday | 50°F | Rain Showers Likely | 10 mph NW | 72% |
| Thursday Night | 33°F | Mostly Cloudy | 6 to 10 mph N | 14% |
| Friday | 49°F | Partly Sunny | 1 to 8 mph N | 1% |
| Friday Night | 26°F | Partly Cloudy | 0 mph | 1% |
| Saturday | 52°F | Mostly Sunny | 0 to 3 mph W | 1% |
| Saturday Night | 30°F | Partly Cloudy | 2 mph W | 6% |
| Sunday | 57°F | Slight Chance Rain Showers | 2 to 7 mph W | 16% |
| Sunday Night | 31°F | Mostly Clear | 3 mph SW | 3% |
| Monday | 60°F | Mostly Sunny | 2 to 9 mph SW | 0% |
| Monday Night | 35°F | Partly Cloudy | 2 to 6 mph W | 1% |
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 Nov 3, 2026.