{"location":{"city":"Zegrze","voivodeship":"Mazowieckie","community":"Gmina Serock","postalCode":"05-131","latitude":52.4606,"longitude":21.0319,"elevation":96},"climateZone":3,"standardOutsideTemp":-20,"annualMeanTemp":8.9,"monthly":[{"month":1,"outsideTemp":-1.71,"heatingDays":31,"degreeDayNum":610,"solarIrradianceKwhM2":22.1,"windSpeedAvg":5.24,"relativeHumidity":84.5,"outsideTempOnHeatingDays":-1.71},{"month":2,"outsideTemp":-0.67,"heatingDays":28,"degreeDayNum":527,"solarIrradianceKwhM2":39.7,"windSpeedAvg":5.21,"relativeHumidity":82.2,"outsideTempOnHeatingDays":-0.67},{"month":3,"outsideTemp":2.84,"heatingDays":31,"degreeDayNum":470,"solarIrradianceKwhM2":82.8,"windSpeedAvg":5.26,"relativeHumidity":76.5,"outsideTempOnHeatingDays":2.84},{"month":4,"outsideTemp":8.78,"heatingDays":29,"degreeDayNum":277,"solarIrradianceKwhM2":126.3,"windSpeedAvg":4.81,"relativeHumidity":70.6,"outsideTempOnHeatingDays":8.65},{"month":5,"outsideTemp":14.09,"heatingDays":26,"degreeDayNum":130,"solarIrradianceKwhM2":160.9,"windSpeedAvg":4.66,"relativeHumidity":69.6,"outsideTempOnHeatingDays":12.99},{"month":6,"outsideTemp":17.49,"heatingDays":16,"degreeDayNum":47,"solarIrradianceKwhM2":164.1,"windSpeedAvg":4.61,"relativeHumidity":70,"outsideTempOnHeatingDays":15.19},{"month":7,"outsideTemp":19.54,"heatingDays":10,"degreeDayNum":17,"solarIrradianceKwhM2":163.4,"windSpeedAvg":4.4,"relativeHumidity":71.3,"outsideTempOnHeatingDays":16.25},{"month":8,"outsideTemp":19.09,"heatingDays":11,"degreeDayNum":21,"solarIrradianceKwhM2":139.1,"windSpeedAvg":4.24,"relativeHumidity":71.2,"outsideTempOnHeatingDays":16.06},{"month":9,"outsideTemp":14.25,"heatingDays":26,"degreeDayNum":118,"solarIrradianceKwhM2":89.5,"windSpeedAvg":4.59,"relativeHumidity":76.5,"outsideTempOnHeatingDays":13.52},{"month":10,"outsideTemp":8.9,"heatingDays":30,"degreeDayNum":282,"solarIrradianceKwhM2":53.4,"windSpeedAvg":4.9,"relativeHumidity":81.3,"outsideTempOnHeatingDays":8.86},{"month":11,"outsideTemp":3.98,"heatingDays":30,"degreeDayNum":420,"solarIrradianceKwhM2":24.7,"windSpeedAvg":4.91,"relativeHumidity":86,"outsideTempOnHeatingDays":3.98},{"month":12,"outsideTemp":-0.06,"heatingDays":31,"degreeDayNum":559,"solarIrradianceKwhM2":16,"windSpeedAvg":5.09,"relativeHumidity":85.9,"outsideTempOnHeatingDays":-0.06}],"groundTemp1m":9.25,"groundTemp2m":9.25,"solarIrradianceKwhM2Year":1082,"windSpeedAvg":4.83,"relativeHumidityAvg":77.1,"suitability":{"score":67,"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":"2026-05-19T12:18:21.231Z","attribution":"Weather data by Open-Meteo.com (CC BY 4.0)","legalRef":"PN-B-02403:1982 (climateZone, standardOutsideTemp)","apiVersion":"v1"}}