{"location":{"city":"Stefanów","voivodeship":"Łódzkie","community":"Koluszki","postalCode":"95-040","latitude":51.7409,"longitude":19.8647,"elevation":214},"climateZone":3,"standardOutsideTemp":-20,"annualMeanTemp":8.7,"monthly":[{"month":1,"outsideTemp":-1.71,"heatingDays":31,"degreeDayNum":610,"solarIrradianceKwhM2":24.8,"windSpeedAvg":5.89,"relativeHumidity":84.4,"outsideTempOnHeatingDays":-1.71},{"month":2,"outsideTemp":-0.64,"heatingDays":28,"degreeDayNum":527,"solarIrradianceKwhM2":43.1,"windSpeedAvg":5.78,"relativeHumidity":82.4,"outsideTempOnHeatingDays":-0.64},{"month":3,"outsideTemp":2.78,"heatingDays":31,"degreeDayNum":471,"solarIrradianceKwhM2":87.6,"windSpeedAvg":5.78,"relativeHumidity":76.9,"outsideTempOnHeatingDays":2.78},{"month":4,"outsideTemp":8.51,"heatingDays":29,"degreeDayNum":285,"solarIrradianceKwhM2":129.2,"windSpeedAvg":5.22,"relativeHumidity":70.9,"outsideTempOnHeatingDays":8.4},{"month":5,"outsideTemp":13.63,"heatingDays":26,"degreeDayNum":142,"solarIrradianceKwhM2":161.3,"windSpeedAvg":5.02,"relativeHumidity":70.6,"outsideTempOnHeatingDays":12.73},{"month":6,"outsideTemp":17.12,"heatingDays":18,"degreeDayNum":54,"solarIrradianceKwhM2":165.6,"windSpeedAvg":4.91,"relativeHumidity":70.2,"outsideTempOnHeatingDays":14.96},{"month":7,"outsideTemp":19.15,"heatingDays":11,"degreeDayNum":22,"solarIrradianceKwhM2":162.6,"windSpeedAvg":4.75,"relativeHumidity":70.7,"outsideTempOnHeatingDays":16.07},{"month":8,"outsideTemp":18.89,"heatingDays":12,"degreeDayNum":25,"solarIrradianceKwhM2":140.9,"windSpeedAvg":4.57,"relativeHumidity":69.9,"outsideTempOnHeatingDays":15.88},{"month":9,"outsideTemp":14.07,"heatingDays":26,"degreeDayNum":123,"solarIrradianceKwhM2":91.7,"windSpeedAvg":5.01,"relativeHumidity":75.6,"outsideTempOnHeatingDays":13.31},{"month":10,"outsideTemp":8.91,"heatingDays":31,"degreeDayNum":282,"solarIrradianceKwhM2":56,"windSpeedAvg":5.36,"relativeHumidity":80.8,"outsideTempOnHeatingDays":8.89},{"month":11,"outsideTemp":3.98,"heatingDays":30,"degreeDayNum":420,"solarIrradianceKwhM2":27.4,"windSpeedAvg":5.43,"relativeHumidity":86.1,"outsideTempOnHeatingDays":3.98},{"month":12,"outsideTemp":-0.06,"heatingDays":31,"degreeDayNum":559,"solarIrradianceKwhM2":18.5,"windSpeedAvg":5.76,"relativeHumidity":85.6,"outsideTempOnHeatingDays":-0.06}],"groundTemp1m":9.23,"groundTemp2m":9.23,"solarIrradianceKwhM2Year":1108.7,"windSpeedAvg":5.29,"relativeHumidityAvg":77,"suitability":{"score":66,"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":"2026-05-19T12:12:31.524Z","attribution":"Weather data by Open-Meteo.com (CC BY 4.0)","legalRef":"PN-B-02403:1982 (climateZone, standardOutsideTemp)","apiVersion":"v1"}}