Fennimore, WI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Fennimore, a city in Grant County, Wisconsin.
Overnight
58°F
Showers And Thunderstorms
Showers and thunderstorms. Some of the storms could produce heavy rain. Cloudy. Low around 58, with temperatures rising to around 61 overnight. East wind around 7 mph. Chance of precipitation is 100%. New rainfall amounts between 2 and 3 inches possible.
7-day forecast for Fennimore
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 58°F | Showers And Thunderstorms | 7 mph E | 100% |
| Saturday | 71°F | Showers And Thunderstorms | 8 mph SE | 97% |
| Saturday Night | 58°F | Showers And Thunderstorms | 5 to 12 mph NE | 80% |
| Sunday | 65°F | Chance Rain Showers | 12 to 15 mph NE | 46% |
| Sunday Night | 52°F | Mostly Cloudy | 15 mph NE | 13% |
| Monday | 62°F | Mostly Cloudy | 14 mph NE | 14% |
| Monday Night | 47°F | Mostly Cloudy then Slight Chance Rain Showers | 7 to 13 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 | 1% |
| 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 6 mph E | 2% |
Forecast source: National Weather Service (api.weather.gov) for Fennimore (42.979, -90.649). Updated through the day.
Growing snapshot for Fennimore
Last spring frost
May 3
First fall frost
Oct 7
Growing season
155 days
Hardiness zone
5a
More local growing data for Fennimore: nearby ZIP 53809 weather · frost dates · planting calendar · Wisconsin frost dates
Nearby towns & communities
Bagley
Bloomington
Boscobel
Cuba City
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Kieler
Lancaster
Livingston
Montfort
Mount Hope
Muscoda
Patch Grove
Platteville
Potosi
Sandy Hook
Tennyson
Woodman
Climate data from the nearest NOAA station, Boscobel Ap, Wi (11.4 mi from Fennimore). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.