{"location":{"city":"Dąbrowa","voivodeship":"Mazowieckie","community":"Siennica","postalCode":"05-332","latitude":52.1053,"longitude":21.5691,"elevation":157},"climateZone":3,"standardOutsideTemp":-20,"annualMeanTemp":8.6,"monthly":[{"month":1,"outsideTemp":-2.02,"heatingDays":31,"degreeDayNum":620,"solarIrradianceKwhM2":23.1,"windSpeedAvg":5.21,"relativeHumidity":84.5,"outsideTempOnHeatingDays":-2.02},{"month":2,"outsideTemp":-1,"heatingDays":28,"degreeDayNum":537,"solarIrradianceKwhM2":40.9,"windSpeedAvg":5.17,"relativeHumidity":82.5,"outsideTempOnHeatingDays":-1},{"month":3,"outsideTemp":2.57,"heatingDays":31,"degreeDayNum":478,"solarIrradianceKwhM2":84.5,"windSpeedAvg":5.25,"relativeHumidity":76.4,"outsideTempOnHeatingDays":2.57},{"month":4,"outsideTemp":8.54,"heatingDays":29,"degreeDayNum":284,"solarIrradianceKwhM2":126.6,"windSpeedAvg":4.8,"relativeHumidity":70.5,"outsideTempOnHeatingDays":8.43},{"month":5,"outsideTemp":13.91,"heatingDays":26,"degreeDayNum":135,"solarIrradianceKwhM2":160.5,"windSpeedAvg":4.64,"relativeHumidity":69.7,"outsideTempOnHeatingDays":12.84},{"month":6,"outsideTemp":17.38,"heatingDays":17,"degreeDayNum":50,"solarIrradianceKwhM2":164.5,"windSpeedAvg":4.56,"relativeHumidity":69.7,"outsideTempOnHeatingDays":15.13},{"month":7,"outsideTemp":19.41,"heatingDays":10,"degreeDayNum":19,"solarIrradianceKwhM2":163.1,"windSpeedAvg":4.37,"relativeHumidity":70.8,"outsideTempOnHeatingDays":16.19},{"month":8,"outsideTemp":18.95,"heatingDays":11,"degreeDayNum":24,"solarIrradianceKwhM2":140.2,"windSpeedAvg":4.22,"relativeHumidity":70.4,"outsideTempOnHeatingDays":15.9},{"month":9,"outsideTemp":14.04,"heatingDays":26,"degreeDayNum":124,"solarIrradianceKwhM2":90.5,"windSpeedAvg":4.57,"relativeHumidity":76.2,"outsideTempOnHeatingDays":13.3},{"month":10,"outsideTemp":8.67,"heatingDays":30,"degreeDayNum":289,"solarIrradianceKwhM2":54.8,"windSpeedAvg":4.86,"relativeHumidity":81.2,"outsideTempOnHeatingDays":8.65},{"month":11,"outsideTemp":3.73,"heatingDays":30,"degreeDayNum":428,"solarIrradianceKwhM2":26.1,"windSpeedAvg":4.9,"relativeHumidity":86,"outsideTempOnHeatingDays":3.73},{"month":12,"outsideTemp":-0.4,"heatingDays":31,"degreeDayNum":570,"solarIrradianceKwhM2":16.9,"windSpeedAvg":5.05,"relativeHumidity":86.2,"outsideTempOnHeatingDays":-0.4}],"groundTemp1m":9.03,"groundTemp2m":9.03,"solarIrradianceKwhM2Year":1091.7,"windSpeedAvg":4.8,"relativeHumidityAvg":77,"suitability":{"score":64,"rating":"fair","color":"yellow","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":"2026-05-19T12:18:51.513Z","attribution":"Weather data by Open-Meteo.com (CC BY 4.0)","legalRef":"PN-B-02403:1982 (climateZone, standardOutsideTemp)","apiVersion":"v1"}}