Denmark, IA Weather & Growing Conditions
Overnight
51°F
Mostly Cloudy
Mostly cloudy, with a low around 51. West wind around 10 mph, with gusts as high as 20 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 51°F | Mostly Cloudy | 10 mph W | 6% |
| Wednesday | 54°F | Slight Chance Rain Showers then Mostly Cloudy | 10 to 15 mph W | 18% |
| Wednesday Night | 45°F | Mostly Cloudy | 10 mph SW | 4% |
| Thursday | 55°F | Mostly Cloudy then Chance Rain Showers | 5 to 10 mph W | 43% |
| Thursday Night | 43°F | Slight Chance Rain Showers then Mostly Cloudy | 5 to 10 mph NW | 21% |
| Friday | 51°F | Partly Sunny | 5 to 10 mph N | 6% |
| Friday Night | 32°F | Partly Cloudy | 0 to 5 mph N | 0% |
| Saturday | 52°F | Mostly Sunny | 0 to 5 mph NW | 0% |
| Saturday Night | 34°F | Mostly Clear | 0 to 5 mph W | 1% |
| Sunday | 58°F | Sunny | 5 mph W | 1% |
| Sunday Night | 36°F | Clear | 0 mph | 0% |
| Monday | 64°F | Sunny | 0 to 5 mph SW | 0% |
| Monday Night | 41°F | Clear | 0 to 5 mph W | 0% |
| Tuesday | 64°F | Sunny | 0 to 5 mph NW | 0% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Denmark, IA
Last spring frost
Apr 12
First fall frost
Oct 25
Growing season
194 days
Hardiness zone
6a
Explore more for Denmark, IA: full frost dates · planting calendar · Iowa frost dates
Climate data from the nearest NOAA station, Ft Madison, Ia (7.8 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.