Fort Atkinson, WI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Fort Atkinson, a city in Jefferson County, Wisconsin.
Overnight
61°F
Mostly Clear
Mostly clear, with a low around 61. South wind around 5 mph.
7-day forecast for Fort Atkinson
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 61°F | Mostly Clear | 5 mph S | 0% |
| Tuesday | 83°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 5 to 10 mph SW | 17% |
| Tuesday Night | 63°F | Chance Showers And Thunderstorms then Showers And Thunderstorms | 0 to 10 mph W | 92% |
| Wednesday | 75°F | Patchy Fog then Chance Showers And Thunderstorms | 5 mph W | 68% |
| Wednesday Night | 58°F | Chance Showers And Thunderstorms | 0 to 5 mph NW | 40% |
| Thursday | 79°F | Slight Chance Rain Showers then Mostly Sunny | 0 to 5 mph N | 21% |
| Thursday Night | 58°F | Mostly Clear | 0 mph | 7% |
| Friday | 81°F | Mostly Sunny | 0 to 5 mph S | 2% |
| Friday Night | 62°F | Mostly Clear | 0 to 5 mph SW | 5% |
| Saturday | 84°F | Sunny then Slight Chance Showers And Thunderstorms | 5 to 10 mph SW | 15% |
| Saturday Night | 67°F | Slight Chance Showers And Thunderstorms | 5 to 10 mph SW | 30% |
| Sunday | 85°F | Chance Showers And Thunderstorms | 10 mph SW | 30% |
| Sunday Night | 66°F | Chance Showers And Thunderstorms | 5 to 10 mph SW | 47% |
| Monday | 83°F | Chance Rain Showers | 5 mph S | 46% |
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 Aug 4, 2026.