{"location":{"city":"Chełmek","voivodeship":"Małopolskie","community":"Chełmek","postalCode":"32-660","latitude":50.101,"longitude":19.2487,"elevation":252},"climateZone":3,"standardOutsideTemp":-20,"annualMeanTemp":8.8,"monthly":[{"month":1,"outsideTemp":-1.97,"heatingDays":31,"degreeDayNum":619,"solarIrradianceKwhM2":30.4,"windSpeedAvg":5.2,"relativeHumidity":83.6,"outsideTempOnHeatingDays":-1.97},{"month":2,"outsideTemp":-0.65,"heatingDays":28,"degreeDayNum":527,"solarIrradianceKwhM2":49.4,"windSpeedAvg":5.17,"relativeHumidity":81,"outsideTempOnHeatingDays":-0.65},{"month":3,"outsideTemp":3.18,"heatingDays":31,"degreeDayNum":459,"solarIrradianceKwhM2":90.8,"windSpeedAvg":5.29,"relativeHumidity":75.6,"outsideTempOnHeatingDays":3.18},{"month":4,"outsideTemp":8.82,"heatingDays":29,"degreeDayNum":275,"solarIrradianceKwhM2":130.3,"windSpeedAvg":4.72,"relativeHumidity":71.2,"outsideTempOnHeatingDays":8.74},{"month":5,"outsideTemp":13.64,"heatingDays":27,"degreeDayNum":140,"solarIrradianceKwhM2":155.2,"windSpeedAvg":4.44,"relativeHumidity":73.6,"outsideTempOnHeatingDays":12.93},{"month":6,"outsideTemp":17.16,"heatingDays":18,"degreeDayNum":53,"solarIrradianceKwhM2":158.5,"windSpeedAvg":4.3,"relativeHumidity":74.8,"outsideTempOnHeatingDays":15.02},{"month":7,"outsideTemp":19.08,"heatingDays":11,"degreeDayNum":23,"solarIrradianceKwhM2":159.7,"windSpeedAvg":4.17,"relativeHumidity":74.1,"outsideTempOnHeatingDays":16.01},{"month":8,"outsideTemp":18.89,"heatingDays":12,"degreeDayNum":25,"solarIrradianceKwhM2":141.2,"windSpeedAvg":3.94,"relativeHumidity":73.5,"outsideTempOnHeatingDays":15.89},{"month":9,"outsideTemp":14.15,"heatingDays":26,"degreeDayNum":120,"solarIrradianceKwhM2":93.8,"windSpeedAvg":4.37,"relativeHumidity":77.1,"outsideTempOnHeatingDays":13.45},{"month":10,"outsideTemp":9.22,"heatingDays":30,"degreeDayNum":272,"solarIrradianceKwhM2":60,"windSpeedAvg":4.58,"relativeHumidity":80.7,"outsideTempOnHeatingDays":9.18},{"month":11,"outsideTemp":4.26,"heatingDays":30,"degreeDayNum":412,"solarIrradianceKwhM2":32.3,"windSpeedAvg":4.68,"relativeHumidity":84.6,"outsideTempOnHeatingDays":4.26},{"month":12,"outsideTemp":-0.27,"heatingDays":31,"degreeDayNum":566,"solarIrradianceKwhM2":23.3,"windSpeedAvg":5.07,"relativeHumidity":84.2,"outsideTempOnHeatingDays":-0.27}],"groundTemp1m":9.21,"groundTemp2m":9.21,"solarIrradianceKwhM2Year":1124.9,"windSpeedAvg":4.66,"relativeHumidityAvg":77.8,"suitability":{"score":66,"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":"2026-05-19T12:07:12.450Z","attribution":"Weather data by Open-Meteo.com (CC BY 4.0)","legalRef":"PN-B-02403:1982 (climateZone, standardOutsideTemp)","apiVersion":"v1"}}