{"location":{"city":"Rostki Wielkie","voivodeship":"Mazowieckie","community":"Gmina Małkinia Górna","postalCode":"07-319","latitude":52.692,"longitude":22.0952,"elevation":113},"climateZone":4,"standardOutsideTemp":-22,"annualMeanTemp":8.5,"monthly":[{"month":1,"outsideTemp":-2.23,"heatingDays":31,"degreeDayNum":627,"solarIrradianceKwhM2":21.4,"windSpeedAvg":5.39,"relativeHumidity":85.4,"outsideTempOnHeatingDays":-2.23},{"month":2,"outsideTemp":-1.27,"heatingDays":28,"degreeDayNum":544,"solarIrradianceKwhM2":39.1,"windSpeedAvg":5.36,"relativeHumidity":83.2,"outsideTempOnHeatingDays":-1.27},{"month":3,"outsideTemp":2.36,"heatingDays":31,"degreeDayNum":484,"solarIrradianceKwhM2":82.9,"windSpeedAvg":5.38,"relativeHumidity":77.1,"outsideTempOnHeatingDays":2.36},{"month":4,"outsideTemp":8.42,"heatingDays":29,"degreeDayNum":287,"solarIrradianceKwhM2":125.4,"windSpeedAvg":4.88,"relativeHumidity":71,"outsideTempOnHeatingDays":8.3},{"month":5,"outsideTemp":13.83,"heatingDays":26,"degreeDayNum":137,"solarIrradianceKwhM2":161.1,"windSpeedAvg":4.78,"relativeHumidity":69.7,"outsideTempOnHeatingDays":12.8},{"month":6,"outsideTemp":17.29,"heatingDays":17,"degreeDayNum":51,"solarIrradianceKwhM2":164,"windSpeedAvg":4.67,"relativeHumidity":70,"outsideTempOnHeatingDays":15.13},{"month":7,"outsideTemp":19.41,"heatingDays":10,"degreeDayNum":19,"solarIrradianceKwhM2":163.4,"windSpeedAvg":4.49,"relativeHumidity":71.1,"outsideTempOnHeatingDays":16.17},{"month":8,"outsideTemp":18.89,"heatingDays":12,"degreeDayNum":24,"solarIrradianceKwhM2":138.3,"windSpeedAvg":4.39,"relativeHumidity":70.9,"outsideTempOnHeatingDays":15.95},{"month":9,"outsideTemp":13.99,"heatingDays":26,"degreeDayNum":125,"solarIrradianceKwhM2":88.3,"windSpeedAvg":4.72,"relativeHumidity":76.5,"outsideTempOnHeatingDays":13.35},{"month":10,"outsideTemp":8.53,"heatingDays":30,"degreeDayNum":293,"solarIrradianceKwhM2":52.5,"windSpeedAvg":5.08,"relativeHumidity":81.5,"outsideTempOnHeatingDays":8.51},{"month":11,"outsideTemp":3.57,"heatingDays":30,"degreeDayNum":432,"solarIrradianceKwhM2":23.7,"windSpeedAvg":5.11,"relativeHumidity":86.3,"outsideTempOnHeatingDays":3.57},{"month":12,"outsideTemp":-0.51,"heatingDays":31,"degreeDayNum":573,"solarIrradianceKwhM2":15.2,"windSpeedAvg":5.22,"relativeHumidity":86.6,"outsideTempOnHeatingDays":-0.51}],"groundTemp1m":8.96,"groundTemp2m":8.96,"solarIrradianceKwhM2Year":1075.3,"windSpeedAvg":4.96,"relativeHumidityAvg":77.4,"suitability":{"score":62,"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":"2026-05-19T12:08:28.586Z","attribution":"Weather data by Open-Meteo.com (CC BY 4.0)","legalRef":"PN-B-02403:1982 (climateZone, standardOutsideTemp)","apiVersion":"v1"}}