{"location":{"city":"Karczew","voivodeship":"Mazowieckie","community":"Gmina Karczew","postalCode":"05-480","latitude":52.08,"longitude":21.2485,"elevation":95},"climateZone":3,"standardOutsideTemp":-20,"annualMeanTemp":9.1,"monthly":[{"month":1,"outsideTemp":-1.57,"heatingDays":31,"degreeDayNum":606,"solarIrradianceKwhM2":23,"windSpeedAvg":5.14,"relativeHumidity":83.8,"outsideTempOnHeatingDays":-1.57},{"month":2,"outsideTemp":-0.51,"heatingDays":28,"degreeDayNum":523,"solarIrradianceKwhM2":40.7,"windSpeedAvg":5.1,"relativeHumidity":81.8,"outsideTempOnHeatingDays":-0.51},{"month":3,"outsideTemp":3.03,"heatingDays":31,"degreeDayNum":464,"solarIrradianceKwhM2":84.1,"windSpeedAvg":5.19,"relativeHumidity":76,"outsideTempOnHeatingDays":3.03},{"month":4,"outsideTemp":9,"heatingDays":29,"degreeDayNum":270,"solarIrradianceKwhM2":126.5,"windSpeedAvg":4.75,"relativeHumidity":70,"outsideTempOnHeatingDays":8.87},{"month":5,"outsideTemp":14.36,"heatingDays":25,"degreeDayNum":123,"solarIrradianceKwhM2":160.2,"windSpeedAvg":4.58,"relativeHumidity":68.9,"outsideTempOnHeatingDays":13.13},{"month":6,"outsideTemp":17.82,"heatingDays":15,"degreeDayNum":43,"solarIrradianceKwhM2":164.2,"windSpeedAvg":4.52,"relativeHumidity":68.8,"outsideTempOnHeatingDays":15.29},{"month":7,"outsideTemp":19.8,"heatingDays":9,"degreeDayNum":15,"solarIrradianceKwhM2":163.1,"windSpeedAvg":4.32,"relativeHumidity":70.2,"outsideTempOnHeatingDays":16.26},{"month":8,"outsideTemp":19.35,"heatingDays":10,"degreeDayNum":20,"solarIrradianceKwhM2":140.1,"windSpeedAvg":4.16,"relativeHumidity":70,"outsideTempOnHeatingDays":16.05},{"month":9,"outsideTemp":14.44,"heatingDays":25,"degreeDayNum":113,"solarIrradianceKwhM2":90.4,"windSpeedAvg":4.51,"relativeHumidity":75.8,"outsideTempOnHeatingDays":13.58},{"month":10,"outsideTemp":9.08,"heatingDays":30,"degreeDayNum":276,"solarIrradianceKwhM2":54.8,"windSpeedAvg":4.79,"relativeHumidity":80.7,"outsideTempOnHeatingDays":9.04},{"month":11,"outsideTemp":4.14,"heatingDays":30,"degreeDayNum":415,"solarIrradianceKwhM2":26.1,"windSpeedAvg":4.81,"relativeHumidity":85.4,"outsideTempOnHeatingDays":4.14},{"month":12,"outsideTemp":0.03,"heatingDays":31,"degreeDayNum":557,"solarIrradianceKwhM2":16.9,"windSpeedAvg":5,"relativeHumidity":85.4,"outsideTempOnHeatingDays":0.03}],"groundTemp1m":9.44,"groundTemp2m":9.44,"solarIrradianceKwhM2Year":1090,"windSpeedAvg":4.74,"relativeHumidityAvg":76.4,"suitability":{"score":70,"rating":"good","color":"lime","estimatedScop":4.1,"notes":["Wysokie nasłonecznienie — bardzo dobre warunki dla hybrydy pompa ciepła + PV."]},"_meta":{"source":"OPEN_METEO_ERA5_LAND_1991_2020","sourceLabel":"ERA5-Land Reanalysis (1991–2020)","fetchedAt":"2026-05-19T12:19:38.143Z","attribution":"Weather data by Open-Meteo.com (CC BY 4.0)","legalRef":"PN-B-02403:1982 (climateZone, standardOutsideTemp)","apiVersion":"v1"}}