{"location":{"city":"Milanówek","voivodeship":"Mazowieckie","community":"Milanówek","postalCode":"05-822","latitude":52.1253,"longitude":20.6695,"elevation":106},"climateZone":3,"standardOutsideTemp":-20,"annualMeanTemp":9.1,"monthly":[{"month":1,"outsideTemp":-1.34,"heatingDays":31,"degreeDayNum":599,"solarIrradianceKwhM2":22.9,"windSpeedAvg":5.37,"relativeHumidity":83.4,"outsideTempOnHeatingDays":-1.34},{"month":2,"outsideTemp":-0.27,"heatingDays":28,"degreeDayNum":516,"solarIrradianceKwhM2":40.8,"windSpeedAvg":5.32,"relativeHumidity":81.5,"outsideTempOnHeatingDays":-0.27},{"month":3,"outsideTemp":3.15,"heatingDays":31,"degreeDayNum":460,"solarIrradianceKwhM2":84.1,"windSpeedAvg":5.37,"relativeHumidity":76,"outsideTempOnHeatingDays":3.15},{"month":4,"outsideTemp":9.02,"heatingDays":29,"degreeDayNum":270,"solarIrradianceKwhM2":127.1,"windSpeedAvg":4.88,"relativeHumidity":69.8,"outsideTempOnHeatingDays":8.86},{"month":5,"outsideTemp":14.25,"heatingDays":25,"degreeDayNum":126,"solarIrradianceKwhM2":161.1,"windSpeedAvg":4.7,"relativeHumidity":69.1,"outsideTempOnHeatingDays":13.06},{"month":6,"outsideTemp":17.69,"heatingDays":16,"degreeDayNum":44,"solarIrradianceKwhM2":164.9,"windSpeedAvg":4.64,"relativeHumidity":69.2,"outsideTempOnHeatingDays":15.23},{"month":7,"outsideTemp":19.7,"heatingDays":9,"degreeDayNum":16,"solarIrradianceKwhM2":163.9,"windSpeedAvg":4.46,"relativeHumidity":70.4,"outsideTempOnHeatingDays":16.25},{"month":8,"outsideTemp":19.3,"heatingDays":10,"degreeDayNum":20,"solarIrradianceKwhM2":140.2,"windSpeedAvg":4.28,"relativeHumidity":70,"outsideTempOnHeatingDays":16.07},{"month":9,"outsideTemp":14.46,"heatingDays":25,"degreeDayNum":113,"solarIrradianceKwhM2":90.3,"windSpeedAvg":4.66,"relativeHumidity":75.5,"outsideTempOnHeatingDays":13.58},{"month":10,"outsideTemp":9.21,"heatingDays":30,"degreeDayNum":272,"solarIrradianceKwhM2":54.5,"windSpeedAvg":4.98,"relativeHumidity":80.4,"outsideTempOnHeatingDays":9.17},{"month":11,"outsideTemp":4.3,"heatingDays":30,"degreeDayNum":411,"solarIrradianceKwhM2":25.7,"windSpeedAvg":4.99,"relativeHumidity":85.3,"outsideTempOnHeatingDays":4.3},{"month":12,"outsideTemp":0.29,"heatingDays":31,"degreeDayNum":548,"solarIrradianceKwhM2":16.7,"windSpeedAvg":5.22,"relativeHumidity":84.9,"outsideTempOnHeatingDays":0.29}],"groundTemp1m":9.62,"groundTemp2m":9.62,"solarIrradianceKwhM2Year":1092.1,"windSpeedAvg":4.91,"relativeHumidityAvg":76.3,"suitability":{"score":70,"rating":"good","color":"lime","estimatedScop":4.1,"notes":["Wysokie nasłonecznienie — bardzo dobre warunki dla hybrydy pompa ciepła + PV."]},"_meta":{"source":"OPEN_METEO_ERA5_LAND_1991_2020","sourceLabel":"ERA5-Land Reanalysis (1991–2020)","fetchedAt":"2026-05-19T12:17:58.085Z","attribution":"Weather data by Open-Meteo.com (CC BY 4.0)","legalRef":"PN-B-02403:1982 (climateZone, standardOutsideTemp)","apiVersion":"v1"}}