Fort Atkinson, WI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Fort Atkinson, a city in Jefferson County, Wisconsin.
Tonight
57°F
Rain Showers
Rain showers before 3am, then showers and thunderstorms. Cloudy, with a low around 57. South wind 10 to 15 mph, with gusts as high as 30 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast for Fort Atkinson
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 57°F | Rain Showers | 10 to 15 mph S | 85% |
| Wednesday | 61°F | Rain Showers | 10 to 15 mph S | 81% |
| Wednesday Night | 45°F | Chance Rain Showers then 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% |
| Tuesday | 60°F | Sunny | 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
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 Nov 4, 2026.