Fort Atkinson, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Fort Atkinson, a city in Winneshiek County, Iowa.
Overnight
50°F
Chance Rain Showers
A chance of rain showers. Mostly cloudy. Low around 50, with temperatures rising to around 53 overnight. Southwest wind around 8 mph. Chance of precipitation is 50%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Fort Atkinson
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 50°F | Chance Rain Showers | 8 mph SW | 47% |
| Wednesday | 54°F | Rain Showers Likely | 8 to 15 mph SW | 74% |
| Wednesday Night | 44°F | Rain Showers Likely | 10 to 15 mph W | 59% |
| Thursday | 52°F | Rain Showers Likely | 10 to 14 mph NW | 59% |
| Thursday Night | 36°F | Mostly Cloudy | 6 to 12 mph N | 9% |
| Friday | 47°F | Mostly Sunny | 2 to 8 mph N | 0% |
| Friday Night | 28°F | Mostly Clear | 1 mph N | 0% |
| Saturday | 50°F | Sunny | 0 to 5 mph W | 0% |
| Saturday Night | 34°F | Mostly Clear | 5 mph W | 1% |
| Sunday | 56°F | Sunny | 3 to 7 mph W | 3% |
| Sunday Night | 36°F | Mostly Clear | 2 mph SW | 0% |
| Monday | 59°F | Sunny | 3 to 10 mph SW | 0% |
| Monday Night | 40°F | Mostly Clear | 2 to 6 mph W | 0% |
| Tuesday | 59°F | Sunny | 3 mph NW | 0% |
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 Nov 4, 2026.