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
Rain Showers Likely
Rain showers likely. Mostly cloudy. High near 70, with temperatures falling to around 65 in the afternoon. East wind around 10 mph. Chance of precipitation is 60%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Fort Atkinson
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 70°F | Rain Showers Likely | 10 mph E | 62% |
| Tonight | 60°F | Showers And Thunderstorms Likely | 10 mph E | 94% |
| Saturday | 73°F | Showers And Thunderstorms | 5 to 15 mph SE | 93% |
| Saturday Night | 58°F | Showers And Thunderstorms Likely | 5 to 10 mph NE | 74% |
| Sunday | 67°F | Chance Rain Showers | 10 to 15 mph NE | 45% |
| Sunday Night | 52°F | Chance Rain Showers then Mostly Cloudy | 10 to 15 mph NE | 28% |
| Monday | 63°F | Slight Chance Rain Showers | 10 to 15 mph NE | 18% |
| Monday Night | 47°F | Slight Chance Rain Showers | 5 to 15 mph NE | 18% |
| Tuesday | 62°F | Slight Chance Rain Showers then Mostly Cloudy | 10 to 15 mph NE | 16% |
| Tuesday Night | 46°F | Partly Cloudy | 5 to 10 mph NE | 8% |
| Wednesday | 65°F | Mostly Sunny | 5 to 10 mph NE | 7% |
| Wednesday Night | 47°F | Partly Cloudy | 0 to 5 mph NE | 2% |
| Thursday | 67°F | Partly Sunny | 0 to 5 mph NE | 4% |
| Thursday Night | 49°F | Partly Cloudy | 0 to 5 mph N | 5% |
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
5b
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
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 Sep 19, 2026.