Denmark, IA Weather & Growing Conditions
Today
88°F
Mostly Sunny
Mostly sunny. High near 88, with temperatures falling to around 86 in the afternoon. South wind 5 to 10 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 88°F | Mostly Sunny | 5 to 10 mph S | 6% |
| Tonight | 68°F | Chance Showers And Thunderstorms | 5 mph NE | 28% |
| Wednesday | 81°F | Chance Showers And Thunderstorms | 5 mph SW | 74% |
| Wednesday Night | 63°F | Showers And Thunderstorms | 5 mph N | 81% |
| Thursday | 81°F | Showers And Thunderstorms Likely then Slight Chance Showers And Thunderstorms | 5 mph NE | 70% |
| Thursday Night | 63°F | Mostly Clear | 0 mph | 9% |
| Friday | 83°F | Mostly Sunny | 0 to 5 mph SE | 7% |
| Friday Night | 66°F | Slight Chance Showers And Thunderstorms | 0 to 5 mph SE | 17% |
| Saturday | 87°F | Slight Chance Showers And Thunderstorms then Sunny | 5 mph S | 17% |
| Saturday Night | 70°F | Mostly Clear | 5 to 10 mph S | 7% |
| Sunday | 89°F | Sunny | 10 mph SW | 7% |
| Sunday Night | 71°F | Partly Cloudy then Slight Chance Showers And Thunderstorms | 5 to 10 mph S | 20% |
| Monday | 89°F | Slight Chance Showers And Thunderstorms then Mostly Sunny | 5 to 10 mph SW | 20% |
| Monday Night | 71°F | Chance Showers And Thunderstorms | 10 mph S | 27% |
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 Aug 4, 2026.