Fennimore, WI Weather & Growing Conditions
Tonight
52°F
Showers And Thunderstorms
Showers and thunderstorms. Cloudy. Low around 52, with temperatures rising to around 56 overnight. South wind around 12 mph, with gusts as high as 26 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 |
|---|---|---|---|---|
| Tonight | 52°F | Showers And Thunderstorms | 12 mph S | 76% |
| Wednesday | 56°F | Rain Showers Likely | 12 to 17 mph SW | 62% |
| Wednesday Night | 45°F | Rain Showers Likely | 13 to 16 mph SW | 67% |
| Thursday | 51°F | Rain Showers | 12 mph W | 79% |
| Thursday Night | 39°F | Slight Chance Rain Showers then Mostly Cloudy | 12 mph N | 20% |
| Friday | 48°F | Partly Sunny | 5 to 10 mph N | 5% |
| Friday Night | 31°F | Partly Cloudy | 0 to 3 mph NW | 1% |
| Saturday | 52°F | Mostly Sunny | 1 to 6 mph W | 1% |
| Saturday Night | 34°F | Partly Cloudy | 5 mph W | 4% |
| Sunday | 58°F | Mostly Sunny then Slight Chance Rain Showers | 5 to 9 mph W | 15% |
| Sunday Night | 35°F | Mostly Clear | 6 mph SW | 4% |
| Monday | 59°F | Mostly Sunny | 6 to 13 mph SW | 1% |
| Monday Night | 39°F | Mostly Clear | 8 mph W | 0% |
| Tuesday | 59°F | Sunny | 8 mph W | 1% |
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 Nov 4, 2026.