{"location":{"city":"Twardów","voivodeship":"Wielkopolskie","community":"Kotlin","postalCode":"63-220","latitude":51.9458,"longitude":17.6289,"elevation":123},"climateZone":2,"standardOutsideTemp":-18,"annualMeanTemp":9.4,"monthly":[{"month":1,"outsideTemp":-0.66,"heatingDays":31,"degreeDayNum":578,"solarIrradianceKwhM2":23.7,"windSpeedAvg":5.91,"relativeHumidity":83.8,"outsideTempOnHeatingDays":-0.66},{"month":2,"outsideTemp":0.44,"heatingDays":28,"degreeDayNum":496,"solarIrradianceKwhM2":42.2,"windSpeedAvg":5.84,"relativeHumidity":80.5,"outsideTempOnHeatingDays":0.44},{"month":3,"outsideTemp":3.65,"heatingDays":31,"degreeDayNum":444,"solarIrradianceKwhM2":85.2,"windSpeedAvg":5.8,"relativeHumidity":76,"outsideTempOnHeatingDays":3.65},{"month":4,"outsideTemp":9.04,"heatingDays":29,"degreeDayNum":269,"solarIrradianceKwhM2":131.2,"windSpeedAvg":5.32,"relativeHumidity":69.9,"outsideTempOnHeatingDays":8.88},{"month":5,"outsideTemp":13.99,"heatingDays":26,"degreeDayNum":132,"solarIrradianceKwhM2":160.6,"windSpeedAvg":5.16,"relativeHumidity":68.9,"outsideTempOnHeatingDays":12.95},{"month":6,"outsideTemp":17.57,"heatingDays":17,"degreeDayNum":48,"solarIrradianceKwhM2":164.3,"windSpeedAvg":5.09,"relativeHumidity":67.8,"outsideTempOnHeatingDays":15.2},{"month":7,"outsideTemp":19.62,"heatingDays":10,"degreeDayNum":18,"solarIrradianceKwhM2":163.4,"windSpeedAvg":4.99,"relativeHumidity":68.1,"outsideTempOnHeatingDays":16.27},{"month":8,"outsideTemp":19.47,"heatingDays":10,"degreeDayNum":19,"solarIrradianceKwhM2":141.1,"windSpeedAvg":4.78,"relativeHumidity":67.5,"outsideTempOnHeatingDays":16.05},{"month":9,"outsideTemp":14.73,"heatingDays":25,"degreeDayNum":106,"solarIrradianceKwhM2":92.1,"windSpeedAvg":5.1,"relativeHumidity":73.5,"outsideTempOnHeatingDays":13.77},{"month":10,"outsideTemp":9.62,"heatingDays":30,"degreeDayNum":259,"solarIrradianceKwhM2":55.5,"windSpeedAvg":5.36,"relativeHumidity":79.6,"outsideTempOnHeatingDays":9.59},{"month":11,"outsideTemp":4.64,"heatingDays":30,"degreeDayNum":400,"solarIrradianceKwhM2":26.7,"windSpeedAvg":5.45,"relativeHumidity":85.6,"outsideTempOnHeatingDays":4.64},{"month":12,"outsideTemp":0.79,"heatingDays":31,"degreeDayNum":533,"solarIrradianceKwhM2":18,"windSpeedAvg":5.73,"relativeHumidity":85.3,"outsideTempOnHeatingDays":0.79}],"groundTemp1m":9.84,"groundTemp2m":9.84,"solarIrradianceKwhM2Year":1103.9,"windSpeedAvg":5.38,"relativeHumidityAvg":75.5,"suitability":{"score":75,"rating":"good","color":"lime","estimatedScop":4.2,"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":"2026-05-19T12:32:18.765Z","attribution":"Weather data by Open-Meteo.com (CC BY 4.0)","legalRef":"PN-B-02403:1982 (climateZone, standardOutsideTemp)","apiVersion":"v1"}}