{"location":{"city":"Sulejówek","voivodeship":"Mazowieckie","community":"Sulejówek","postalCode":"05-071","latitude":52.2425,"longitude":21.2715,"elevation":107},"climateZone":3,"standardOutsideTemp":-20,"annualMeanTemp":9,"monthly":[{"month":1,"outsideTemp":-1.7,"heatingDays":31,"degreeDayNum":610,"solarIrradianceKwhM2":22.6,"windSpeedAvg":5.26,"relativeHumidity":84,"outsideTempOnHeatingDays":-1.7},{"month":2,"outsideTemp":-0.65,"heatingDays":28,"degreeDayNum":527,"solarIrradianceKwhM2":40.3,"windSpeedAvg":5.21,"relativeHumidity":81.9,"outsideTempOnHeatingDays":-0.65},{"month":3,"outsideTemp":2.89,"heatingDays":31,"degreeDayNum":468,"solarIrradianceKwhM2":83.5,"windSpeedAvg":5.28,"relativeHumidity":76.1,"outsideTempOnHeatingDays":2.89},{"month":4,"outsideTemp":8.87,"heatingDays":29,"degreeDayNum":274,"solarIrradianceKwhM2":126.2,"windSpeedAvg":4.84,"relativeHumidity":69.8,"outsideTempOnHeatingDays":8.73},{"month":5,"outsideTemp":14.24,"heatingDays":25,"degreeDayNum":127,"solarIrradianceKwhM2":160.7,"windSpeedAvg":4.67,"relativeHumidity":68.7,"outsideTempOnHeatingDays":13.02},{"month":6,"outsideTemp":17.7,"heatingDays":16,"degreeDayNum":44,"solarIrradianceKwhM2":164.2,"windSpeedAvg":4.61,"relativeHumidity":68.6,"outsideTempOnHeatingDays":15.22},{"month":7,"outsideTemp":19.71,"heatingDays":9,"degreeDayNum":17,"solarIrradianceKwhM2":163.5,"windSpeedAvg":4.41,"relativeHumidity":70,"outsideTempOnHeatingDays":16.25},{"month":8,"outsideTemp":19.24,"heatingDays":10,"degreeDayNum":21,"solarIrradianceKwhM2":139.7,"windSpeedAvg":4.25,"relativeHumidity":69.8,"outsideTempOnHeatingDays":15.98},{"month":9,"outsideTemp":14.31,"heatingDays":26,"degreeDayNum":116,"solarIrradianceKwhM2":90,"windSpeedAvg":4.6,"relativeHumidity":75.7,"outsideTempOnHeatingDays":13.5},{"month":10,"outsideTemp":8.95,"heatingDays":30,"degreeDayNum":280,"solarIrradianceKwhM2":54.1,"windSpeedAvg":4.91,"relativeHumidity":80.8,"outsideTempOnHeatingDays":8.91},{"month":11,"outsideTemp":4.02,"heatingDays":30,"degreeDayNum":419,"solarIrradianceKwhM2":25.5,"windSpeedAvg":4.94,"relativeHumidity":85.6,"outsideTempOnHeatingDays":4.02},{"month":12,"outsideTemp":-0.08,"heatingDays":31,"degreeDayNum":560,"solarIrradianceKwhM2":16.4,"windSpeedAvg":5.11,"relativeHumidity":85.6,"outsideTempOnHeatingDays":-0.08}],"groundTemp1m":9.32,"groundTemp2m":9.32,"solarIrradianceKwhM2Year":1086.7,"windSpeedAvg":4.84,"relativeHumidityAvg":76.4,"suitability":{"score":68,"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":"2026-05-19T12:08:26.901Z","attribution":"Weather data by Open-Meteo.com (CC BY 4.0)","legalRef":"PN-B-02403:1982 (climateZone, standardOutsideTemp)","apiVersion":"v1"}}