Denmark, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Denmark, a community in Lee County, Iowa.
Tonight
67°F
Chance Showers And Thunderstorms
A slight chance of rain showers before 10pm, then a chance of showers and thunderstorms between 11pm and 1am, then showers and thunderstorms likely. Mostly cloudy. Low around 67, with temperatures rising to around 69 overnight. Northwest wind 0 to 5 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast for Denmark
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 67°F | Chance Showers And Thunderstorms | 0 to 5 mph NW | 62% |
| Sunday | 73°F | Showers And Thunderstorms Likely then Chance Showers And Thunderstorms | 5 to 10 mph N | 64% |
| Sunday Night | 59°F | Chance Showers And Thunderstorms | 10 mph NE | 66% |
| Monday | 64°F | Showers And Thunderstorms | 10 mph NE | 80% |
| Monday Night | 55°F | Rain Showers | 10 mph NE | 75% |
| Tuesday | 62°F | Chance Rain Showers | 10 mph NE | 35% |
| Tuesday Night | 50°F | Mostly Cloudy | 5 to 10 mph NE | 3% |
| Wednesday | 65°F | Partly Sunny | 5 mph NE | 1% |
| Wednesday Night | 53°F | Mostly Cloudy | 0 to 5 mph NE | 1% |
| Thursday | 69°F | Partly Sunny | 0 to 5 mph NE | 4% |
| Thursday Night | 57°F | Slight Chance Rain Showers | 0 mph | 16% |
| Friday | 73°F | Slight Chance Rain Showers | 0 to 5 mph NE | 16% |
| Friday Night | 58°F | Mostly Cloudy | 0 to 5 mph NE | 7% |
| Saturday | 74°F | Mostly Sunny | 5 mph E | 7% |
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
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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 Sep 20, 2026.