{"location":{"city":"Sumin","voivodeship":"Kujawsko-Pomorskie","community":"Osiek","postalCode":"37-340","latitude":53.124,"longitude":19.4211,"elevation":128},"climateZone":3,"standardOutsideTemp":-20,"annualMeanTemp":8.5,"monthly":[{"month":1,"outsideTemp":-1.81,"heatingDays":31,"degreeDayNum":614,"solarIrradianceKwhM2":21.8,"windSpeedAvg":5.89,"relativeHumidity":86.4,"outsideTempOnHeatingDays":-1.81},{"month":2,"outsideTemp":-0.75,"heatingDays":28,"degreeDayNum":530,"solarIrradianceKwhM2":39.6,"windSpeedAvg":5.84,"relativeHumidity":83.4,"outsideTempOnHeatingDays":-0.75},{"month":3,"outsideTemp":2.52,"heatingDays":31,"degreeDayNum":479,"solarIrradianceKwhM2":82.4,"windSpeedAvg":5.82,"relativeHumidity":77.6,"outsideTempOnHeatingDays":2.52},{"month":4,"outsideTemp":8.2,"heatingDays":29,"degreeDayNum":294,"solarIrradianceKwhM2":127.9,"windSpeedAvg":5.31,"relativeHumidity":71.8,"outsideTempOnHeatingDays":8.07},{"month":5,"outsideTemp":13.23,"heatingDays":27,"degreeDayNum":153,"solarIrradianceKwhM2":161.8,"windSpeedAvg":5.15,"relativeHumidity":71.2,"outsideTempOnHeatingDays":12.38},{"month":6,"outsideTemp":16.59,"heatingDays":20,"degreeDayNum":63,"solarIrradianceKwhM2":163.8,"windSpeedAvg":5.06,"relativeHumidity":72,"outsideTempOnHeatingDays":14.87},{"month":7,"outsideTemp":18.76,"heatingDays":13,"degreeDayNum":26,"solarIrradianceKwhM2":162.2,"windSpeedAvg":4.9,"relativeHumidity":72.8,"outsideTempOnHeatingDays":16.09},{"month":8,"outsideTemp":18.51,"heatingDays":13,"degreeDayNum":28,"solarIrradianceKwhM2":138,"windSpeedAvg":4.7,"relativeHumidity":72,"outsideTempOnHeatingDays":15.96},{"month":9,"outsideTemp":13.93,"heatingDays":27,"degreeDayNum":126,"solarIrradianceKwhM2":88.3,"windSpeedAvg":5.17,"relativeHumidity":76.7,"outsideTempOnHeatingDays":13.35},{"month":10,"outsideTemp":8.71,"heatingDays":31,"degreeDayNum":288,"solarIrradianceKwhM2":52.4,"windSpeedAvg":5.48,"relativeHumidity":81.9,"outsideTempOnHeatingDays":8.71},{"month":11,"outsideTemp":3.82,"heatingDays":30,"degreeDayNum":425,"solarIrradianceKwhM2":23.6,"windSpeedAvg":5.53,"relativeHumidity":87.4,"outsideTempOnHeatingDays":3.82},{"month":12,"outsideTemp":-0.09,"heatingDays":31,"degreeDayNum":560,"solarIrradianceKwhM2":15.4,"windSpeedAvg":5.69,"relativeHumidity":87.5,"outsideTempOnHeatingDays":-0.09}],"groundTemp1m":8.89,"groundTemp2m":8.89,"solarIrradianceKwhM2Year":1077.2,"windSpeedAvg":5.38,"relativeHumidityAvg":78.4,"suitability":{"score":63,"rating":"fair","color":"yellow","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":"2026-05-19T12:10:41.829Z","attribution":"Weather data by Open-Meteo.com (CC BY 4.0)","legalRef":"PN-B-02403:1982 (climateZone, standardOutsideTemp)","apiVersion":"v1"}}