Fennimore, WI Weather & Growing Conditions
Today
71°F
Showers And Thunderstorms
Showers and thunderstorms. Some of the storms could produce heavy rain. Cloudy. High near 71, with temperatures falling to around 69 in the afternoon. South wind around 8 mph. Chance of precipitation is 90%. New rainfall amounts between 1 and 2 inches possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 71°F | Showers And Thunderstorms | 8 mph S | 91% |
| Tonight | 58°F | Showers And Thunderstorms | 6 to 12 mph NE | 80% |
| Sunday | 65°F | Chance Rain Showers | 14 mph NE | 45% |
| Sunday Night | 52°F | Mostly Cloudy | 15 mph NE | 13% |
| Monday | 62°F | Mostly Cloudy | 14 mph NE | 13% |
| Monday Night | 47°F | Mostly Cloudy then Slight Chance Rain Showers | 7 to 12 mph NE | 16% |
| Tuesday | 61°F | Slight Chance Rain Showers then Partly Sunny | 7 to 12 mph NE | 16% |
| Tuesday Night | 44°F | Partly Cloudy | 3 to 8 mph NE | 3% |
| Wednesday | 65°F | Mostly Sunny | 5 to 9 mph NE | 2% |
| Wednesday Night | 48°F | Partly Cloudy | 5 mph NE | 2% |
| Thursday | 66°F | Mostly Sunny | 6 mph NE | 4% |
| Thursday Night | 50°F | Partly Cloudy | 3 mph E | 2% |
| Friday | 70°F | Mostly Sunny | 2 to 7 mph E | 2% |
| Friday Night | 51°F | Partly Cloudy | 3 mph E | 3% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Fennimore, WI
Last spring frost
May 3
First fall frost
Oct 7
Growing season
155 days
Hardiness zone
5a
Explore more for Fennimore, WI: full frost dates · planting calendar · Wisconsin frost dates
Climate data from the nearest NOAA station, Boscobel Ap, Wi (11.4 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.