DMI Forecast API

Weather forecasts from the Danish Meteorological Institute

Location and Time

Location:

Latitude

Longitude

Timezone

API Mode:

Time:

Forecast days

Past days

Forecast provides the latest, continuously updated weather forecast. By default, we provide forecasts for 3 days, but you can access forecasts for up to 15 days. Use Past Days to include recently archived forecasts.

For older archived forecasts, switch to mode.

You can also check out our Historical Weather API with data going back to 1940.

Hourly Weather Variables

Temperature (2 m)

Relative Humidity (2 m)

Dewpoint (2 m)

Apparent Temperature

Precipitation (rain + snow)

Rain

Snowfall

Snow Depth Water Equivalent

Weather code

Sea Level Pressure

Surface Pressure

Cloud Cover Total

Cloud Cover Low

Cloud Cover Mid

Cloud Cover High

Cloud Cover / Fog (2m)

Visibility

Cloud Base

Cloud Top

Reference Evapotranspiration (ET₀)

Vapour Pressure Deficit

Wind Speed (10 m)

Wind Speed (50 m)

Wind Speed (100 m)

Wind Speed (150 m)

Wind Speed (250 m)

Wind Speed (350 m)

Wind Speed (450 m)

Wind Direction (10 m)

Wind Direction (50 m)

Wind Direction (100 m)

Wind Direction (150 m)

Wind Direction (250 m)

Wind Direction (350 m)

Wind Direction (450 m)

Wind Gusts (10 m)

Surface Temperature

Temperature (50 m)

Temperature (100 m)

Temperature (150 m)

Temperature (250 m)

Daily Weather Variables

Weather code

Maximum Temperature (2 m)

Minimum Temperature (2 m)

Maximum Apparent Temperature (2 m)

Minimum Apparent Temperature (2 m)

Sunrise

Sunset

Daylight Duration

Sunshine Duration

UV Index

UV Index Clear Sky

Precipitation Sum

Rain Sum

Showers Sum

Snowfall Sum

Precipitation Hours

Maximum Wind Speed (10 m)

Maximum Wind Gusts (10 m)

Dominant Wind Direction (10 m)

Shortwave Radiation Sum

Reference Evapotranspiration (ET₀)

Settings

Temperature Unit

Wind Speed Unit

Precipitation Unit

Timeformat

Usage licence:

API Response

Preview:

Download XLSX Download CSV

API URL (Open in new tab or copy this URL into your application)

Data Sources

DMI provides weather forecasts from the HARMONIE AROME model with ECMWF IFS initialization. This is a collaboration of multiple European national weather services under the name "United Weather Centres-West" (UWC-West). Forecasts for Europe use 2 km resolution and provide a large range of weather variables. All data is updated every 3 hours and provides forecast for up to 2.5 days. After 2.5 days, Open-Meteo combines forecasts with the ECMWF IFS HRES 9 km model to provide up to 15 days of forecast.

You can find the update timings in the model updates documentation.
Weather Model	Region	Spatial Resolution	Temporal Resolution	Forecast Length	Update frequency
DMI HARMONIE AROME DINI	Central & Northern Europe up to Iceland (green area below)	2 km	Hourly	2.5 days	Every 3 hours

DMI HARMONIE AROME DINI Model Area. Source: Open-Meteo.

Native Model Variables

HARMONIE AROME DINI directly predicts the fields listed below. Open-Meteo retains these fields or uses them to calculate more convenient API variables. Notably, DMI provides direct solar radiation, 10 m wind speed and direction, and a 2 m cloud cover (fog) field natively.

Native DMI field	Level	Use in the Open-Meteo API
Temperature	2 m, 50/100/150/250 m, surface	temperature_2m and upper-level temperature
Relative humidity	2 m	Relative humidity and dew point
Wind speed and direction (10 m), U/V components (aloft)	10 m to 450 m	wind_speed_10m and upper-level wind
Wind gusts	10 m	wind_gusts_10m
Mean sea-level pressure	Mean sea level	pressure_msl and derived surface pressure
Precipitation and snowfall water equivalent	Surface	precipitation, rain, snowfall
Direct solar radiation	Surface	Global, direct, diffuse radiation, DNI and GTI
Cloud cover total, low, mid, high and fog fraction	Surface	cloud_cover, layers and cloud_cover_2m
CAPE, convective inhibition, visibility, cloud base and top, freezing level	Surface	Corresponding API variables and weather-code inputs

Pressure-level data is not available for this model.

Derived Variables

HARMONIE AROME DINI publishes an unusually complete set of native fields, including direct solar radiation, 10 m wind speed and direction, CAPE, convective inhibition and a 2 m cloud cover (fog) field. The remaining API variables are derived by Open-Meteo.

Derived Variable	How it is derived?
Wind speed and direction at height	Calculated from the native U and V wind components at 50 m to 450 m, corrected for the Lambert projection. The 10 m wind is native and needs no correction.
Diffuse radiation and DNI	Diffuse radiation is global minus native direct radiation. DNI follows from native direct radiation and solar geometry, together with GTI and instant values.
Weather code	Computed from cloud cover, precipitation, snowfall, wind gusts, CAPE, convective inhibition and visibility, so thunderstorm codes are possible.
Snowfall and rain	Snowfall converts the native snowfall water equivalent with 0.7 cm per mm. Rain is total precipitation minus the snowfall water equivalent.
Dew point, vapour pressure deficit and wet bulb temperature	Calculated from native 2 m temperature and relative humidity.
Surface pressure	Calculated from mean sea-level pressure, 2 m temperature and terrain elevation.
Sunshine duration	Seconds per hour with native direct normal irradiance above the WMO threshold of 120 W/m².
Apparent temperature and reference evapotranspiration ET₀	Combine temperature, humidity, wind speed and solar radiation. ET₀ follows the FAO-56 Penman-Monteith equation.

Sunrise, sunset, daylight duration and the day-or-night flag are astronomical calculations. Daily values are aggregated from hourly data.

API Documentation

For a detailed list of all available weather variables please refer to the general Weather Forecast API. Only notable remarks are listed below

Direct Solar Radiation: DMI provides direct solar radiation. Many other weather models only provide global solar radiation and direct solar radiation must be calculated user separation models.
Direct Normalized Irradiance (DNI): Although DNI is available, it has not been integrated. Open-Meteo uses solar position algorithms which calculate DNI from direct radiation with (almost) the same results.
Wind Direction Correction: Wind direction has been calculated from U/V wind component vectors. Special care has been taken to correct for the Lambert Conformal Conic projection. Without this correction, wind directions have an error of up to 15°.
Cloud Cover (2m): DMI provides cloud cover at 2 metre abouve ground which can be interpreted as fog. This is remarkable, because only very weather models are capable of modeling low level cloud cover and fog with a good degree of accuracy.