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.
Today
81°F
Patchy Fog then Slight Chance Showers And Thunderstorms
Patchy fog before 7am, then patchy fog and a slight chance of showers and thunderstorms between 7am and 8am, then patchy fog and a chance of showers and thunderstorms between 8am and noon, then a slight chance of showers and thunderstorms between noon and 5pm, then a chance of showers and thunderstorms. Mostly cloudy. High near 81, with temperatures falling to around 76 in the afternoon. Southwest wind around 8 mph, with gusts as high as 20 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Black River Falls
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 81°F | Patchy Fog then Slight Chance Showers And Thunderstorms | 8 mph SW | 44% |
| Tonight | 56°F | Showers And Thunderstorms Likely | 1 to 6 mph W | 66% |
| Wednesday | 80°F | Mostly Sunny | 1 to 5 mph NW | 1% |
| Wednesday Night | 50°F | Mostly Clear | 0 to 3 mph SW | 0% |
| Thursday | 86°F | Sunny | 0 to 5 mph SW | 0% |
| Thursday Night | 57°F | Mostly Clear | 3 mph SW | 0% |
| Friday | 88°F | Sunny | 1 to 9 mph SW | 6% |
| Friday Night | 61°F | Slight Chance Showers And Thunderstorms | 2 to 8 mph SW | 20% |
| Saturday | 88°F | Slight Chance Showers And Thunderstorms | 2 to 7 mph SW | 15% |
| Saturday Night | 64°F | Chance Showers And Thunderstorms | 1 to 7 mph SW | 39% |
| Sunday | 87°F | Chance Showers And Thunderstorms | 1 to 7 mph W | 39% |
| Sunday Night | 62°F | Chance Showers And Thunderstorms | 0 to 6 mph SW | 38% |
| Monday | 86°F | Chance Rain Showers then Slight Chance Showers And Thunderstorms | 1 to 6 mph SE | 32% |
| Monday Night | 61°F | Slight Chance Showers And Thunderstorms | 1 to 6 mph NE | 29% |
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 Aug 4, 2026.