{"location":{"city":"Łęg","voivodeship":"Świętokrzyskie","community":"Połaniec","postalCode":"28-230","latitude":50.4353,"longitude":21.3134,"elevation":160},"climateZone":3,"standardOutsideTemp":-20,"annualMeanTemp":9.3,"monthly":[{"month":1,"outsideTemp":-1.68,"heatingDays":31,"degreeDayNum":610,"solarIrradianceKwhM2":28.1,"windSpeedAvg":5.3,"relativeHumidity":82.9,"outsideTempOnHeatingDays":-1.68},{"month":2,"outsideTemp":-0.43,"heatingDays":28,"degreeDayNum":521,"solarIrradianceKwhM2":46.6,"windSpeedAvg":5.33,"relativeHumidity":80.7,"outsideTempOnHeatingDays":-0.43},{"month":3,"outsideTemp":3.45,"heatingDays":31,"degreeDayNum":451,"solarIrradianceKwhM2":89.6,"windSpeedAvg":5.44,"relativeHumidity":74.9,"outsideTempOnHeatingDays":3.45},{"month":4,"outsideTemp":9.38,"heatingDays":29,"degreeDayNum":259,"solarIrradianceKwhM2":130,"windSpeedAvg":4.96,"relativeHumidity":69.8,"outsideTempOnHeatingDays":9.25},{"month":5,"outsideTemp":14.54,"heatingDays":25,"degreeDayNum":117,"solarIrradianceKwhM2":159.5,"windSpeedAvg":4.79,"relativeHumidity":70.5,"outsideTempOnHeatingDays":13.35},{"month":6,"outsideTemp":18.15,"heatingDays":14,"degreeDayNum":37,"solarIrradianceKwhM2":164.3,"windSpeedAvg":4.65,"relativeHumidity":70.5,"outsideTempOnHeatingDays":15.46},{"month":7,"outsideTemp":20.09,"heatingDays":8,"degreeDayNum":13,"solarIrradianceKwhM2":162,"windSpeedAvg":4.47,"relativeHumidity":70.2,"outsideTempOnHeatingDays":16.33},{"month":8,"outsideTemp":19.8,"heatingDays":8,"degreeDayNum":16,"solarIrradianceKwhM2":143.1,"windSpeedAvg":4.25,"relativeHumidity":69.6,"outsideTempOnHeatingDays":16.15},{"month":9,"outsideTemp":14.79,"heatingDays":24,"degreeDayNum":105,"solarIrradianceKwhM2":94.9,"windSpeedAvg":4.66,"relativeHumidity":74.8,"outsideTempOnHeatingDays":13.76},{"month":10,"outsideTemp":9.45,"heatingDays":30,"degreeDayNum":265,"solarIrradianceKwhM2":59.6,"windSpeedAvg":4.81,"relativeHumidity":79.6,"outsideTempOnHeatingDays":9.36},{"month":11,"outsideTemp":4.41,"heatingDays":30,"degreeDayNum":407,"solarIrradianceKwhM2":30.8,"windSpeedAvg":4.94,"relativeHumidity":83.7,"outsideTempOnHeatingDays":4.41},{"month":12,"outsideTemp":0.01,"heatingDays":31,"degreeDayNum":557,"solarIrradianceKwhM2":21.2,"windSpeedAvg":5.12,"relativeHumidity":83.5,"outsideTempOnHeatingDays":0.01}],"groundTemp1m":9.66,"groundTemp2m":9.66,"solarIrradianceKwhM2Year":1129.7,"windSpeedAvg":4.89,"relativeHumidityAvg":75.9,"suitability":{"score":71,"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":"2026-05-19T12:29:53.787Z","attribution":"Weather data by Open-Meteo.com (CC BY 4.0)","legalRef":"PN-B-02403:1982 (climateZone, standardOutsideTemp)","apiVersion":"v1"}}