Decorah, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Decorah, a city in Winneshiek County, Iowa.
This Afternoon
67°F
Showers And Thunderstorms
Rain showers before 3pm, then showers and thunderstorms. Cloudy, with a high near 67. South wind 9 to 14 mph, with gusts as high as 24 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast for Decorah
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 67°F | Showers And Thunderstorms | 9 to 14 mph S | 82% |
| Tonight | 52°F | Showers And Thunderstorms | 9 mph S | 90% |
| Wednesday | 54°F | Rain Showers Likely | 9 to 15 mph SW | 77% |
| Wednesday Night | 45°F | Rain Showers Likely | 12 to 15 mph W | 75% |
| Thursday | 50°F | Rain Showers | 13 mph NW | 77% |
| Thursday Night | 38°F | Mostly Cloudy | 14 mph N | 10% |
| Friday | 49°F | Partly Sunny | 8 to 12 mph N | 1% |
| Friday Night | 31°F | Partly Cloudy | 1 mph N | 0% |
| Saturday | 53°F | Mostly Sunny | 0 to 3 mph NW | 1% |
| Saturday Night | 35°F | Partly Cloudy | 2 mph W | 3% |
| Sunday | 57°F | Sunny | 2 to 6 mph W | 5% |
| Sunday Night | 37°F | Mostly Clear | 2 mph SW | 2% |
| Monday | 61°F | Sunny | 1 to 9 mph SW | 0% |
| Monday Night | 40°F | Mostly Clear | 1 to 5 mph W | 1% |
Forecast source: National Weather Service (api.weather.gov) for Decorah (43.302, -91.785). Updated through the day.
Growing snapshot for Decorah
Last spring frost
May 3
First fall frost
Oct 7
Growing season
157 days
Hardiness zone
5a
More local growing data for Decorah: nearby ZIP 52101 weather · frost dates · planting calendar · Iowa frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Decorah, Ia (4.4 mi from Decorah). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 3, 2026.