{"location":{"city":"Świerczyna","voivodeship":"Wielkopolskie","community":"Gmina Osieczna","postalCode":"64-113","latitude":51.9182,"longitude":16.7586,"elevation":81},"climateZone":2,"standardOutsideTemp":-18,"annualMeanTemp":9.7,"monthly":[{"month":1,"outsideTemp":-0.21,"heatingDays":31,"degreeDayNum":564,"solarIrradianceKwhM2":23.4,"windSpeedAvg":5.69,"relativeHumidity":83.4,"outsideTempOnHeatingDays":-0.21},{"month":2,"outsideTemp":0.83,"heatingDays":28,"degreeDayNum":485,"solarIrradianceKwhM2":42.3,"windSpeedAvg":5.61,"relativeHumidity":80.4,"outsideTempOnHeatingDays":0.83},{"month":3,"outsideTemp":4.02,"heatingDays":31,"degreeDayNum":433,"solarIrradianceKwhM2":84.6,"windSpeedAvg":5.57,"relativeHumidity":76.3,"outsideTempOnHeatingDays":4.02},{"month":4,"outsideTemp":9.35,"heatingDays":29,"degreeDayNum":260,"solarIrradianceKwhM2":131.6,"windSpeedAvg":5.14,"relativeHumidity":70,"outsideTempOnHeatingDays":9.16},{"month":5,"outsideTemp":14.27,"heatingDays":26,"degreeDayNum":125,"solarIrradianceKwhM2":160.3,"windSpeedAvg":4.98,"relativeHumidity":68.6,"outsideTempOnHeatingDays":13.17},{"month":6,"outsideTemp":17.88,"heatingDays":15,"degreeDayNum":43,"solarIrradianceKwhM2":163.9,"windSpeedAvg":4.96,"relativeHumidity":67,"outsideTempOnHeatingDays":15.27},{"month":7,"outsideTemp":19.89,"heatingDays":9,"degreeDayNum":15,"solarIrradianceKwhM2":162.5,"windSpeedAvg":4.81,"relativeHumidity":67.6,"outsideTempOnHeatingDays":16.35},{"month":8,"outsideTemp":19.73,"heatingDays":9,"degreeDayNum":17,"solarIrradianceKwhM2":140.5,"windSpeedAvg":4.62,"relativeHumidity":67.3,"outsideTempOnHeatingDays":16.11},{"month":9,"outsideTemp":15,"heatingDays":24,"degreeDayNum":99,"solarIrradianceKwhM2":92.3,"windSpeedAvg":4.91,"relativeHumidity":73.5,"outsideTempOnHeatingDays":13.94},{"month":10,"outsideTemp":9.9,"heatingDays":30,"degreeDayNum":251,"solarIrradianceKwhM2":55.5,"windSpeedAvg":5.15,"relativeHumidity":79.6,"outsideTempOnHeatingDays":9.82},{"month":11,"outsideTemp":4.86,"heatingDays":30,"degreeDayNum":394,"solarIrradianceKwhM2":26.5,"windSpeedAvg":5.2,"relativeHumidity":85.6,"outsideTempOnHeatingDays":4.86},{"month":12,"outsideTemp":1.16,"heatingDays":31,"degreeDayNum":522,"solarIrradianceKwhM2":18,"windSpeedAvg":5.52,"relativeHumidity":85.1,"outsideTempOnHeatingDays":1.16}],"groundTemp1m":10,"groundTemp2m":10,"solarIrradianceKwhM2Year":1101.3,"windSpeedAvg":5.18,"relativeHumidityAvg":75.4,"suitability":{"score":79,"rating":"good","color":"lime","estimatedScop":4.2,"notes":["Wysokie nasłonecznienie — bardzo dobre warunki dla hybrydy pompa ciepła + PV.","Wysoka średnia prędkość wiatru (5.2 m/s) — większe straty przez infiltrację."]},"_meta":{"source":"OPEN_METEO_ERA5_LAND_1991_2020","sourceLabel":"ERA5-Land Reanalysis (1991–2020)","fetchedAt":"2026-05-19T12:33:03.773Z","attribution":"Weather data by Open-Meteo.com (CC BY 4.0)","legalRef":"PN-B-02403:1982 (climateZone, standardOutsideTemp)","apiVersion":"v1"}}