{"location":{"city":"Łętownia","voivodeship":"Małopolskie","community":"Jordanów","postalCode":"34-242","latitude":49.6946,"longitude":19.8581,"elevation":488},"climateZone":3,"standardOutsideTemp":-20,"annualMeanTemp":7.6,"monthly":[{"month":1,"outsideTemp":-2.72,"heatingDays":31,"degreeDayNum":642,"solarIrradianceKwhM2":31.5,"windSpeedAvg":4.27,"relativeHumidity":82.7,"outsideTempOnHeatingDays":-2.72},{"month":2,"outsideTemp":-1.6,"heatingDays":28,"degreeDayNum":554,"solarIrradianceKwhM2":49.6,"windSpeedAvg":4.39,"relativeHumidity":80.6,"outsideTempOnHeatingDays":-1.6},{"month":3,"outsideTemp":2.03,"heatingDays":31,"degreeDayNum":495,"solarIrradianceKwhM2":91.6,"windSpeedAvg":4.55,"relativeHumidity":77,"outsideTempOnHeatingDays":2.03},{"month":4,"outsideTemp":7.52,"heatingDays":29,"degreeDayNum":314,"solarIrradianceKwhM2":129.4,"windSpeedAvg":4.12,"relativeHumidity":73.5,"outsideTempOnHeatingDays":7.47},{"month":5,"outsideTemp":12.43,"heatingDays":29,"degreeDayNum":174,"solarIrradianceKwhM2":151.4,"windSpeedAvg":3.85,"relativeHumidity":75.9,"outsideTempOnHeatingDays":12.01},{"month":6,"outsideTemp":15.93,"heatingDays":21,"degreeDayNum":78,"solarIrradianceKwhM2":154.5,"windSpeedAvg":3.74,"relativeHumidity":77.1,"outsideTempOnHeatingDays":14.3},{"month":7,"outsideTemp":17.7,"heatingDays":16,"degreeDayNum":42,"solarIrradianceKwhM2":155.3,"windSpeedAvg":3.62,"relativeHumidity":76.9,"outsideTempOnHeatingDays":15.39},{"month":8,"outsideTemp":17.54,"heatingDays":17,"degreeDayNum":44,"solarIrradianceKwhM2":138.6,"windSpeedAvg":3.4,"relativeHumidity":77,"outsideTempOnHeatingDays":15.44},{"month":9,"outsideTemp":12.89,"heatingDays":28,"degreeDayNum":155,"solarIrradianceKwhM2":93.9,"windSpeedAvg":3.74,"relativeHumidity":80.1,"outsideTempOnHeatingDays":12.5},{"month":10,"outsideTemp":8.09,"heatingDays":31,"degreeDayNum":307,"solarIrradianceKwhM2":62.2,"windSpeedAvg":3.88,"relativeHumidity":82.7,"outsideTempOnHeatingDays":8.08},{"month":11,"outsideTemp":3.19,"heatingDays":30,"degreeDayNum":444,"solarIrradianceKwhM2":34.2,"windSpeedAvg":3.89,"relativeHumidity":85.5,"outsideTempOnHeatingDays":3.19},{"month":12,"outsideTemp":-1.37,"heatingDays":31,"degreeDayNum":600,"solarIrradianceKwhM2":24.5,"windSpeedAvg":4.23,"relativeHumidity":84.1,"outsideTempOnHeatingDays":-1.37}],"groundTemp1m":8.36,"groundTemp2m":8.36,"solarIrradianceKwhM2Year":1116.6,"windSpeedAvg":3.98,"relativeHumidityAvg":79.4,"suitability":{"score":52,"rating":"fair","color":"yellow","estimatedScop":4,"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":"2026-05-19T12:08:21.677Z","attribution":"Weather data by Open-Meteo.com (CC BY 4.0)","legalRef":"PN-B-02403:1982 (climateZone, standardOutsideTemp)","apiVersion":"v1"}}