Fort Atkinson, WI Weather & Growing Conditions

Local forecast, frost dates, hardiness zone and planting guidance for Fort Atkinson, a city in Jefferson County, Wisconsin.

This Afternoon

70°F

Light Rain Likely

Rain likely and a slight chance of thunderstorms. Cloudy, with a high near 70. South wind around 15 mph, with gusts as high as 35 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch possible.

7-day forecast for Fort Atkinson

When	Temp	Forecast	Wind	Precip
This Afternoon	70°F	Light Rain Likely	15 mph S	66%
Tonight	56°F	Light Rain	10 to 15 mph S	85%
Wednesday	61°F	Light Rain	10 to 15 mph S	81%
Wednesday Night	45°F	Chance Light Rain	10 to 15 mph SW	50%
Thursday	54°F	Light Rain Likely	5 to 10 mph W	72%
Thursday Night	38°F	Chance Light Rain	5 to 10 mph NW	46%
Friday	49°F	Slight Chance Light Rain then Mostly Cloudy	10 to 15 mph N	18%
Friday Night	31°F	Partly Cloudy	0 to 5 mph N	2%
Saturday	52°F	Mostly Sunny	0 to 5 mph W	4%
Saturday Night	32°F	Partly Cloudy	0 to 5 mph W	7%
Sunday	57°F	Slight Chance Light Rain	5 to 10 mph W	17%
Sunday Night	33°F	Mostly Clear	5 mph W	5%
Monday	60°F	Mostly Sunny	5 to 15 mph SW	1%
Monday Night	37°F	Mostly Clear	5 to 10 mph W	1%

Forecast source: National Weather Service (api.weather.gov) for Fort Atkinson (42.924, -88.845). Updated through the day.

Growing snapshot for Fort Atkinson

Last spring frost

Apr 28

First fall frost

Oct 13

Growing season

166 days

Hardiness zone

More local growing data for Fort Atkinson: nearby ZIP 53538 weather · frost dates · planting calendar · Wisconsin frost dates

Nearby towns & communities

Hebron Helenville Ixonia Jefferson Johnson Creek Lake Mills Palmyra Rome Sullivan Waterloo Watertown

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Climate data from the nearest NOAA station, Ft Atkinson, Wi (0.7 mi from Fort Atkinson). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.