Fort Atkinson, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Fort Atkinson, a city in Winneshiek County, Iowa.
Today
70°F
Showers And Thunderstorms
Showers and thunderstorms. Some of the storms could produce heavy rain. Cloudy. High near 70, with temperatures falling to around 68 in the afternoon. South wind around 7 mph. Chance of precipitation is 100%. New rainfall amounts between 2 and 3 inches possible.
7-day forecast for Fort Atkinson
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 70°F | Showers And Thunderstorms | 7 mph S | 96% |
| Tonight | 56°F | Showers And Thunderstorms Likely | 7 to 12 mph N | 55% |
| Sunday | 65°F | Slight Chance Rain Showers then Mostly Cloudy | 12 to 15 mph NE | 19% |
| Sunday Night | 50°F | Mostly Cloudy then Slight Chance Rain Showers | 12 mph NE | 22% |
| Monday | 62°F | Chance Rain Showers | 13 mph NE | 26% |
| Monday Night | 45°F | Slight Chance Rain Showers then Mostly Cloudy | 5 to 9 mph NE | 21% |
| Tuesday | 60°F | Mostly Sunny | 5 to 9 mph NE | 11% |
| Tuesday Night | 42°F | Mostly Clear | 5 mph NE | 2% |
| Wednesday | 64°F | Sunny | 5 mph E | 1% |
| Wednesday Night | 47°F | Mostly Clear | 2 mph E | 3% |
| Thursday | 66°F | Slight Chance Rain Showers | 3 mph E | 15% |
| Thursday Night | 49°F | Partly Cloudy | 1 mph E | 3% |
| Friday | 68°F | Mostly Sunny | 1 to 5 mph E | 5% |
| Friday Night | 50°F | Partly Cloudy | 2 mph SE | 6% |
Forecast source: National Weather Service (api.weather.gov) for Fort Atkinson (43.144, -91.934). Updated through the day.
Growing snapshot for Fort Atkinson
Last spring frost
May 3
First fall frost
Oct 7
Growing season
157 days
Hardiness zone
5a
More local growing data for Fort Atkinson: nearby ZIP 52144 weather · frost dates · planting calendar · Iowa frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Decorah, Ia (14.1 mi from Fort Atkinson). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.