{"location":{"city":"Czarny Las","voivodeship":"Łódzkie","community":"Buczek","postalCode":"98-113","latitude":51.4921,"longitude":19.2213,"elevation":198},"climateZone":3,"standardOutsideTemp":-20,"annualMeanTemp":8.9,"monthly":[{"month":1,"outsideTemp":-1.57,"heatingDays":31,"degreeDayNum":606,"solarIrradianceKwhM2":25.2,"windSpeedAvg":5.86,"relativeHumidity":84.6,"outsideTempOnHeatingDays":-1.57},{"month":2,"outsideTemp":-0.48,"heatingDays":28,"degreeDayNum":522,"solarIrradianceKwhM2":43.6,"windSpeedAvg":5.77,"relativeHumidity":82.3,"outsideTempOnHeatingDays":-0.48},{"month":3,"outsideTemp":2.93,"heatingDays":31,"degreeDayNum":467,"solarIrradianceKwhM2":87.3,"windSpeedAvg":5.76,"relativeHumidity":77.1,"outsideTempOnHeatingDays":2.93},{"month":4,"outsideTemp":8.67,"heatingDays":29,"degreeDayNum":280,"solarIrradianceKwhM2":129.7,"windSpeedAvg":5.26,"relativeHumidity":70.5,"outsideTempOnHeatingDays":8.54},{"month":5,"outsideTemp":13.84,"heatingDays":26,"degreeDayNum":137,"solarIrradianceKwhM2":159.8,"windSpeedAvg":5.09,"relativeHumidity":69.6,"outsideTempOnHeatingDays":12.79},{"month":6,"outsideTemp":17.38,"heatingDays":17,"degreeDayNum":51,"solarIrradianceKwhM2":163.7,"windSpeedAvg":4.97,"relativeHumidity":68.9,"outsideTempOnHeatingDays":15.01},{"month":7,"outsideTemp":19.35,"heatingDays":11,"degreeDayNum":21,"solarIrradianceKwhM2":161.5,"windSpeedAvg":4.84,"relativeHumidity":69.6,"outsideTempOnHeatingDays":16.06},{"month":8,"outsideTemp":19.13,"heatingDays":11,"degreeDayNum":23,"solarIrradianceKwhM2":140.5,"windSpeedAvg":4.63,"relativeHumidity":68.7,"outsideTempOnHeatingDays":15.89},{"month":9,"outsideTemp":14.28,"heatingDays":25,"degreeDayNum":118,"solarIrradianceKwhM2":92,"windSpeedAvg":5.03,"relativeHumidity":74.7,"outsideTempOnHeatingDays":13.38},{"month":10,"outsideTemp":9.09,"heatingDays":31,"degreeDayNum":276,"solarIrradianceKwhM2":56.3,"windSpeedAvg":5.32,"relativeHumidity":80.6,"outsideTempOnHeatingDays":9.08},{"month":11,"outsideTemp":4.17,"heatingDays":30,"degreeDayNum":414,"solarIrradianceKwhM2":27.9,"windSpeedAvg":5.42,"relativeHumidity":86,"outsideTempOnHeatingDays":4.17},{"month":12,"outsideTemp":0.08,"heatingDays":31,"degreeDayNum":555,"solarIrradianceKwhM2":18.9,"windSpeedAvg":5.7,"relativeHumidity":85.8,"outsideTempOnHeatingDays":0.08}],"groundTemp1m":9.35,"groundTemp2m":9.35,"solarIrradianceKwhM2Year":1106.3,"windSpeedAvg":5.3,"relativeHumidityAvg":76.5,"suitability":{"score":68,"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":"2026-05-19T12:12:13.945Z","attribution":"Weather data by Open-Meteo.com (CC BY 4.0)","legalRef":"PN-B-02403:1982 (climateZone, standardOutsideTemp)","apiVersion":"v1"}}