Weather API for Weather Forecasts

API for Weather Forecasts

Our Weather Forecast API is based on high quality weather models. We optimize global forecasts to specific sites using Model Output Statistics. Our solar forecasts based on this methodology have earned top marks in benchmarks. For complex parameters such as wind fields or precipitation we rely on the COSMO-1 model. The model is specifically adapted to the Alpine region and has a fine mesh of only 1 km.

Typical applications of the weather forecasts API are:

  • Routing or timetable web applications that provide customers with a forecast on a specific location and time as added value
  • Control software for buildings, heaters, cooling etc. which optimize an installation taking into account the weather
  • Applications for the optimization of energy planning and energy trading, which require weather data for the forecast of production and consumption


  • Weather forecasts in hourly resolution
  • Forecast horizon up to 10 days in the future
  • Any locations (defined by place name, postal code or coordinates)
  • Worldwide coverage
  • Output format CSV, XML, JSON, YAML or as needed
  • Sums/averages of hourly values for 6, 12, 24 h possible

Available parameters (selection)

Weather forecasts

ttTemperature 2 m above ground °C
txMaximum temperature 2 m above ground °C
tnMinimum temperature 2 m above ground °C
tdDew point 2 m above ground °C
tt5Ground temperature 5 cm above ground °C
rhRelative humidity 2 m above ground %
rrRain rate, total precipitation mm
rrpProbability of rain %
thProbability of thunder %
slSnowfall line m a.s.l./m ü.M.
ffWind speed km/h
fxMaximum wind gust km/h
ddWind direction °
dddWind direction N/S/W/E
nTotal cloud coverage octa
clvl/cll/clmCloud coverage very low/low/medium altitude octa
ssSunshine duration min
radGlobal radiation W/m2
syWeather symbol as defined by Meteotest #1-15
synopSynop code #1-99
zerodegHeight of zero degree level m a.s.l./m ü.M.
qffAir pressure hPa
et0Evapotranspiration in hourly & daily resolutions mm/h | mm/d