Temperature [2 m]
Growing degree days [2 m]
Temperature [1000 hPa]
Temperature [850 hPa]
Temperature [700 hPa]
Relative humidity [2 m]
Wind speed [10 m]
Wind speed [80 m]
Wind gusts [10 m]
Wind speed and direction [900 hPa]
Wind speed and direction [850 hPa]
Wind speed and direction [700 hPa]
Wind speed and direction [500 hPa]
Total cloud cover
Low, mid and high cloud cover
Sunshine duration (minutes)
Pressure [mean sea level]
Geopotential height [1000 hPa]
Geopotential height [850 hPa]
Geopotential height [700 hPa]
Geopotential height [500 hPa]
FAO reference evapotranspiration (ET₀)
Surface skin temperature
Soil temperature [0-10 cm down]
Soil moisture [0-10 cm down]
Vapor pressure deficit [2 m]
Weather variables information
Temperature (2m) and relative humidity (2m):
Comparable to measurements at 2 meters above ground.
Atmospheric air pressure adjusted to mean sea level as most commonly used for weather reports. The local pressure varies with altitude. Locations at higher elevation have a lower local atmospheric pressure.
Total precipitation amount including rain, convective precipitation and snow. 1 mm at 10:00 is comparable to a rain-gauge measurement from 9:00-10:00.
Fraction of total precipitation that falls as snow and is converted to cm instead of mm.
Total cloud cover:
Percentage of the sky covered with clouds: 50% means half of the sky is covered. 0-25% is mostly clear sky, 25-50% partly cloudy, 50-85% mostly cloudy and above 85% overcast.
Low, mid and high cloud cover:
Cloud cover at different altitudes. High clouds (8-15 km) like Cirrus, are less significant for total cloud cover than mid clouds (4-8 km) like Alto-Cumulus and Alto-Stratus, or low clouds (below 4 km), like Stratus, Cumulus and fog.
Global radiation (diffuse and direct) on a horizontal plain given in Watt per square meter.
Hourly average wind speeds at given altitude levels (e.g. 10 and 80 meters above ground) or pressure level (e.g. 900 hPa). Units can be selected.
Wind direction in degrees, seamlessly from 0° (wind blowing from North), 90° (East wind), 180° (South wind) and 270° (West wind) to 359°.
Short term wind speed turbulence in an hour. Gusts are maximum measurable wind speed and indicate the level of turbulence. They are mostly higher than regular wind speeds.
All data will use the selected timezone. There is no automatic switching for daylight saving time. Data are either summer or winter-time. The current timezone is selected automatically. We highly recommend GMT+00 for further processing.
Aggregate data to daily minimum, mean, maximum and summation in CSV download. This simplifies further data analyses in external programs.
Parameter for growing degree days (GDD)
5° to 30°C
Wheat, barley, rye, oats 8° to 30°C
Sunflower, potato 10° to 30°C
Maize, sorghum, rice, soybeans, tomato 30° to 50°C
Heat zone (e.g. reed seat maturation) 15° to -50°C
Heating degree (VDI 3807) Custom
Set values below
Adjust base and limit parameter for growing degree calculation. A limit-value lower than base, calculates the temperature cold sum.