Potosi, WI Weather & Growing Conditions
This Afternoon
67°F
Showers And Thunderstorms Likely
Showers and thunderstorms likely. Cloudy. High near 67, with temperatures falling to around 64 in the afternoon. South wind around 13 mph, with gusts as high as 22 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 67°F | Showers And Thunderstorms Likely | 13 mph S | 71% |
| Tonight | 53°F | Showers And Thunderstorms | 9 to 13 mph S | 88% |
| Wednesday | 56°F | Rain Showers Likely | 12 to 16 mph SW | 55% |
| Wednesday Night | 46°F | Chance Rain Showers | 14 mph SW | 43% |
| Thursday | 52°F | Rain Showers Likely | 12 mph W | 73% |
| Thursday Night | 41°F | Slight Chance Rain Showers then Mostly Cloudy | 10 mph N | 20% |
| Friday | 49°F | Partly Sunny | 5 to 10 mph N | 8% |
| Friday Night | 33°F | Partly Cloudy | 3 mph N | 1% |
| Saturday | 52°F | Mostly Sunny | 1 to 5 mph W | 2% |
| Saturday Night | 35°F | Partly Cloudy | 5 mph W | 3% |
| Sunday | 58°F | Mostly Sunny | 5 to 9 mph W | 13% |
| Sunday Night | 37°F | Mostly Clear | 6 mph SW | 3% |
| Monday | 59°F | Sunny | 5 to 12 mph SW | 1% |
| Monday Night | 40°F | Mostly Clear | 7 mph W | 0% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Potosi, WI
Last spring frost
Apr 27
First fall frost
Oct 11
Growing season
166 days
Hardiness zone
5a
Explore more for Potosi, WI: full frost dates · planting calendar · Wisconsin frost dates
Climate data from the nearest NOAA station, Lancaster 4 Wsw, Wi (9.9 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.