Corydon, IA Weather & Growing Conditions
Tonight
47°F
Cloudy
Cloudy, with a low around 47. West wind around 13 mph, with gusts as high as 22 mph. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 47°F | Cloudy | 13 mph W | 14% |
| Wednesday | 53°F | Mostly Cloudy | 13 to 16 mph W | 11% |
| Wednesday Night | 42°F | Mostly Cloudy | 10 mph WSW | 4% |
| Thursday | 53°F | Mostly Cloudy then Chance Rain Showers | 7 to 12 mph WNW | 30% |
| Thursday Night | 41°F | Slight Chance Rain Showers then Mostly Cloudy | 8 mph NNW | 17% |
| Friday | 52°F | Partly Sunny | 3 to 8 mph N | 5% |
| Friday Night | 35°F | Partly Cloudy | 2 mph NNW | 0% |
| Saturday | 55°F | Partly Sunny | 0 to 5 mph WSW | 2% |
| Saturday Night | 37°F | Mostly Clear | 1 to 5 mph W | 5% |
| Sunday | 61°F | Sunny | 6 mph W | 4% |
| Sunday Night | 39°F | Mostly Clear | 6 mph SW | 1% |
| Monday | 65°F | Sunny | 6 to 13 mph SW | 0% |
| Monday Night | 42°F | Mostly Clear | 5 mph WNW | 0% |
| Tuesday | 65°F | Sunny | 6 mph NNW | 0% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Corydon, IA
Last spring frost
Apr 21
First fall frost
Oct 19
Growing season
178 days
Hardiness zone
5b
Explore more for Corydon, IA: full frost dates · planting calendar · Iowa frost dates
Climate data from the nearest NOAA station, Allerton, Ia (4.4 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.