{"location":{"city":"Koszalin","voivodeship":"Zachodniopomorskie","community":"Koszalin","postalCode":"75-001","latitude":54.1792,"longitude":16.189,"elevation":40},"climateZone":1,"standardOutsideTemp":-16,"annualMeanTemp":8.9,"monthly":[{"month":1,"outsideTemp":0.18,"heatingDays":31,"degreeDayNum":552,"solarIrradianceKwhM2":19.3,"windSpeedAvg":7.12,"relativeHumidity":84.5,"outsideTempOnHeatingDays":0.18},{"month":2,"outsideTemp":0.67,"heatingDays":28,"degreeDayNum":489,"solarIrradianceKwhM2":38.3,"windSpeedAvg":6.95,"relativeHumidity":82.5,"outsideTempOnHeatingDays":0.67},{"month":3,"outsideTemp":3.06,"heatingDays":31,"degreeDayNum":463,"solarIrradianceKwhM2":82.3,"windSpeedAvg":6.58,"relativeHumidity":79,"outsideTempOnHeatingDays":3.06},{"month":4,"outsideTemp":7.71,"heatingDays":29,"degreeDayNum":308,"solarIrradianceKwhM2":131.5,"windSpeedAvg":6.02,"relativeHumidity":75,"outsideTempOnHeatingDays":7.62},{"month":5,"outsideTemp":12.28,"heatingDays":28,"degreeDayNum":181,"solarIrradianceKwhM2":171,"windSpeedAvg":5.73,"relativeHumidity":74.2,"outsideTempOnHeatingDays":11.65},{"month":6,"outsideTemp":15.74,"heatingDays":24,"degreeDayNum":81,"solarIrradianceKwhM2":173.5,"windSpeedAvg":5.86,"relativeHumidity":74.8,"outsideTempOnHeatingDays":14.65},{"month":7,"outsideTemp":18.13,"heatingDays":16,"degreeDayNum":31,"solarIrradianceKwhM2":169.3,"windSpeedAvg":5.65,"relativeHumidity":76,"outsideTempOnHeatingDays":16.14},{"month":8,"outsideTemp":18.14,"heatingDays":15,"degreeDayNum":30,"solarIrradianceKwhM2":139.8,"windSpeedAvg":5.58,"relativeHumidity":75.8,"outsideTempOnHeatingDays":16.05},{"month":9,"outsideTemp":14.3,"heatingDays":27,"degreeDayNum":114,"solarIrradianceKwhM2":89.6,"windSpeedAvg":5.96,"relativeHumidity":78.4,"outsideTempOnHeatingDays":13.84},{"month":10,"outsideTemp":9.63,"heatingDays":31,"degreeDayNum":259,"solarIrradianceKwhM2":51.2,"windSpeedAvg":6.51,"relativeHumidity":81.3,"outsideTempOnHeatingDays":9.63},{"month":11,"outsideTemp":4.97,"heatingDays":30,"degreeDayNum":390,"solarIrradianceKwhM2":22.7,"windSpeedAvg":6.56,"relativeHumidity":85.8,"outsideTempOnHeatingDays":4.97},{"month":12,"outsideTemp":1.62,"heatingDays":31,"degreeDayNum":507,"solarIrradianceKwhM2":13.9,"windSpeedAvg":6.94,"relativeHumidity":86.1,"outsideTempOnHeatingDays":1.62}],"groundTemp1m":9.24,"groundTemp2m":9.24,"solarIrradianceKwhM2Year":1102.3,"windSpeedAvg":6.29,"relativeHumidityAvg":79.4,"suitability":{"score":72,"rating":"good","color":"lime","estimatedScop":4.1,"notes":["Wysokie nasłonecznienie - bardzo dobre warunki dla hybrydy pompa ciepła + PV.","Wysoka średnia prędkość wiatru (6.3 m/s) - większe straty przez infiltrację."]},"_meta":{"source":"OPEN_METEO_ERA5_LAND_1991_2020","sourceLabel":"ERA5-Land Reanalysis (1991-2020)","fetchedAt":"2026-05-19T12:04:39.966Z","attribution":"Weather data by Open-Meteo.com (CC BY 4.0)","legalRef":"PN-B-02403:1982 (climateZone, standardOutsideTemp)","apiVersion":"v1"}}