Denmark, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Denmark, a community in Lee County, Iowa.
Today
88°F
Mostly Sunny
Mostly sunny, with a high near 88. South wind 5 to 10 mph.
7-day forecast for Denmark
| 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 S | 75% |
| 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 | 71% |
| Thursday Night | 63°F | Mostly Clear | 0 mph | 9% |
| Friday | 84°F | Mostly Sunny | 0 to 5 mph SE | 7% |
| Friday Night | 66°F | Slight Chance Showers And Thunderstorms | 0 to 5 mph SE | 18% |
| Saturday | 87°F | Slight Chance Showers And Thunderstorms then Sunny | 5 mph S | 18% |
| Saturday Night | 71°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 | 72°F | Chance Showers And Thunderstorms | 10 mph S | 27% |
Forecast source: National Weather Service (api.weather.gov) for Denmark (40.734, -91.338). Updated through the day.
Growing snapshot for Denmark
Last spring frost
Apr 12
First fall frost
Oct 25
Growing season
194 days
Hardiness zone
6a
More local growing data for Denmark: nearby ZIP 52624 weather · frost dates · planting calendar · Iowa frost dates
Nearby towns & communities
Argyle
Donnellson
Farmington
Fort Madison
Franklin
Hillsboro
Houghton
Keokuk
Montrose
Mooar
Oak Hills
Sandusky
St. Paul
West Point
Wever
Climate data from the nearest NOAA station, Ft Madison, Ia (7.8 mi from Denmark). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.