{"location":{"city":"Piekary","voivodeship":"Łódzkie","community":"Sulmierzyce","postalCode":"98-338","latitude":51.1822,"longitude":19.1535,"elevation":224},"climateZone":2,"standardOutsideTemp":-18,"annualMeanTemp":8.9,"monthly":[{"month":1,"outsideTemp":-1.64,"heatingDays":31,"degreeDayNum":609,"solarIrradianceKwhM2":26.2,"windSpeedAvg":6.02,"relativeHumidity":84.2,"outsideTempOnHeatingDays":-1.64},{"month":2,"outsideTemp":-0.55,"heatingDays":28,"degreeDayNum":524,"solarIrradianceKwhM2":44.8,"windSpeedAvg":5.93,"relativeHumidity":81.8,"outsideTempOnHeatingDays":-0.55},{"month":3,"outsideTemp":2.96,"heatingDays":31,"degreeDayNum":466,"solarIrradianceKwhM2":88.2,"windSpeedAvg":5.9,"relativeHumidity":76.4,"outsideTempOnHeatingDays":2.96},{"month":4,"outsideTemp":8.69,"heatingDays":29,"degreeDayNum":279,"solarIrradianceKwhM2":130,"windSpeedAvg":5.36,"relativeHumidity":69.8,"outsideTempOnHeatingDays":8.56},{"month":5,"outsideTemp":13.79,"heatingDays":26,"degreeDayNum":138,"solarIrradianceKwhM2":159,"windSpeedAvg":5.22,"relativeHumidity":69.5,"outsideTempOnHeatingDays":12.77},{"month":6,"outsideTemp":17.37,"heatingDays":17,"degreeDayNum":52,"solarIrradianceKwhM2":162.6,"windSpeedAvg":5.08,"relativeHumidity":68.7,"outsideTempOnHeatingDays":15.04},{"month":7,"outsideTemp":19.33,"heatingDays":11,"degreeDayNum":22,"solarIrradianceKwhM2":161.2,"windSpeedAvg":4.94,"relativeHumidity":69.3,"outsideTempOnHeatingDays":16.04},{"month":8,"outsideTemp":19.1,"heatingDays":11,"degreeDayNum":24,"solarIrradianceKwhM2":140.6,"windSpeedAvg":4.69,"relativeHumidity":68.6,"outsideTempOnHeatingDays":15.85},{"month":9,"outsideTemp":14.25,"heatingDays":25,"degreeDayNum":119,"solarIrradianceKwhM2":92.4,"windSpeedAvg":5.11,"relativeHumidity":74.3,"outsideTempOnHeatingDays":13.35},{"month":10,"outsideTemp":9.11,"heatingDays":31,"degreeDayNum":275,"solarIrradianceKwhM2":57,"windSpeedAvg":5.43,"relativeHumidity":80,"outsideTempOnHeatingDays":9.1},{"month":11,"outsideTemp":4.19,"heatingDays":30,"degreeDayNum":414,"solarIrradianceKwhM2":28.7,"windSpeedAvg":5.51,"relativeHumidity":85.3,"outsideTempOnHeatingDays":4.19},{"month":12,"outsideTemp":0.01,"heatingDays":31,"degreeDayNum":557,"solarIrradianceKwhM2":19.7,"windSpeedAvg":5.88,"relativeHumidity":85.2,"outsideTempOnHeatingDays":0.01}],"groundTemp1m":9.35,"groundTemp2m":9.35,"solarIrradianceKwhM2Year":1110.3,"windSpeedAvg":5.42,"relativeHumidityAvg":76.1,"suitability":{"score":67,"rating":"good","color":"lime","estimatedScop":4.1,"notes":["Wysokie nasłonecznienie — bardzo dobre warunki dla hybrydy pompa ciepła + PV.","Wysoka średnia prędkość wiatru (5.4 m/s) — większe straty przez infiltrację."]},"_meta":{"source":"OPEN_METEO_ERA5_LAND_1991_2020","sourceLabel":"ERA5-Land Reanalysis (1991–2020)","fetchedAt":"2026-05-19T12:12:45.967Z","attribution":"Weather data by Open-Meteo.com (CC BY 4.0)","legalRef":"PN-B-02403:1982 (climateZone, standardOutsideTemp)","apiVersion":"v1"}}