{"location":{"city":"Siekierki Małe","voivodeship":"Wielkopolskie","community":"Kostrzyn","postalCode":"62-025","latitude":52.3879,"longitude":17.1445,"elevation":96},"climateZone":2,"standardOutsideTemp":-18,"annualMeanTemp":9.3,"monthly":[{"month":1,"outsideTemp":-0.58,"heatingDays":31,"degreeDayNum":576,"solarIrradianceKwhM2":22.5,"windSpeedAvg":5.72,"relativeHumidity":84.3,"outsideTempOnHeatingDays":-0.58},{"month":2,"outsideTemp":0.41,"heatingDays":28,"degreeDayNum":497,"solarIrradianceKwhM2":41,"windSpeedAvg":5.69,"relativeHumidity":81.3,"outsideTempOnHeatingDays":0.41},{"month":3,"outsideTemp":3.57,"heatingDays":31,"degreeDayNum":447,"solarIrradianceKwhM2":83.6,"windSpeedAvg":5.66,"relativeHumidity":76.9,"outsideTempOnHeatingDays":3.57},{"month":4,"outsideTemp":8.93,"heatingDays":29,"degreeDayNum":272,"solarIrradianceKwhM2":130.5,"windSpeedAvg":5.24,"relativeHumidity":70.6,"outsideTempOnHeatingDays":8.76},{"month":5,"outsideTemp":13.88,"heatingDays":26,"degreeDayNum":135,"solarIrradianceKwhM2":161,"windSpeedAvg":5.05,"relativeHumidity":69.1,"outsideTempOnHeatingDays":12.9},{"month":6,"outsideTemp":17.4,"heatingDays":17,"degreeDayNum":50,"solarIrradianceKwhM2":164.3,"windSpeedAvg":5.03,"relativeHumidity":68.1,"outsideTempOnHeatingDays":15.16},{"month":7,"outsideTemp":19.44,"heatingDays":11,"degreeDayNum":19,"solarIrradianceKwhM2":162.2,"windSpeedAvg":4.9,"relativeHumidity":69,"outsideTempOnHeatingDays":16.21},{"month":8,"outsideTemp":19.23,"heatingDays":11,"degreeDayNum":21,"solarIrradianceKwhM2":139.3,"windSpeedAvg":4.69,"relativeHumidity":69,"outsideTempOnHeatingDays":16.13},{"month":9,"outsideTemp":14.6,"heatingDays":25,"degreeDayNum":109,"solarIrradianceKwhM2":90.9,"windSpeedAvg":5.03,"relativeHumidity":74.6,"outsideTempOnHeatingDays":13.76},{"month":10,"outsideTemp":9.47,"heatingDays":30,"degreeDayNum":264,"solarIrradianceKwhM2":53.8,"windSpeedAvg":5.25,"relativeHumidity":80.7,"outsideTempOnHeatingDays":9.44},{"month":11,"outsideTemp":4.48,"heatingDays":30,"degreeDayNum":405,"solarIrradianceKwhM2":25,"windSpeedAvg":5.28,"relativeHumidity":86.6,"outsideTempOnHeatingDays":4.48},{"month":12,"outsideTemp":0.82,"heatingDays":31,"degreeDayNum":532,"solarIrradianceKwhM2":16.7,"windSpeedAvg":5.53,"relativeHumidity":86.1,"outsideTempOnHeatingDays":0.82}],"groundTemp1m":9.59,"groundTemp2m":9.59,"solarIrradianceKwhM2Year":1090.8,"windSpeedAvg":5.26,"relativeHumidityAvg":76.4,"suitability":{"score":74,"rating":"good","color":"lime","estimatedScop":4.1,"notes":["Wysokie nasłonecznienie — bardzo dobre warunki dla hybrydy pompa ciepła + PV.","Wysoka średnia prędkość wiatru (5.3 m/s) — większe straty przez infiltrację."]},"_meta":{"source":"OPEN_METEO_ERA5_LAND_1991_2020","sourceLabel":"ERA5-Land Reanalysis (1991–2020)","fetchedAt":"2026-05-19T12:33:40.931Z","attribution":"Weather data by Open-Meteo.com (CC BY 4.0)","legalRef":"PN-B-02403:1982 (climateZone, standardOutsideTemp)","apiVersion":"v1"}}