{"location":{"city":"Helenówka","voivodeship":"Świętokrzyskie","community":"Gmina Imielno","postalCode":"28-313","latitude":50.5802,"longitude":20.408,"elevation":249},"climateZone":3,"standardOutsideTemp":-20,"annualMeanTemp":8.7,"monthly":[{"month":1,"outsideTemp":-2.15,"heatingDays":31,"degreeDayNum":624,"solarIrradianceKwhM2":28.5,"windSpeedAvg":5.64,"relativeHumidity":83.9,"outsideTempOnHeatingDays":-2.15},{"month":2,"outsideTemp":-0.95,"heatingDays":28,"degreeDayNum":535,"solarIrradianceKwhM2":47.4,"windSpeedAvg":5.66,"relativeHumidity":81.8,"outsideTempOnHeatingDays":-0.95},{"month":3,"outsideTemp":2.91,"heatingDays":31,"degreeDayNum":467,"solarIrradianceKwhM2":90.5,"windSpeedAvg":5.78,"relativeHumidity":75.6,"outsideTempOnHeatingDays":2.91},{"month":4,"outsideTemp":8.71,"heatingDays":29,"degreeDayNum":278,"solarIrradianceKwhM2":130.9,"windSpeedAvg":5.19,"relativeHumidity":70.4,"outsideTempOnHeatingDays":8.61},{"month":5,"outsideTemp":13.75,"heatingDays":27,"degreeDayNum":137,"solarIrradianceKwhM2":159.6,"windSpeedAvg":5,"relativeHumidity":71.7,"outsideTempOnHeatingDays":12.91},{"month":6,"outsideTemp":17.3,"heatingDays":17,"degreeDayNum":51,"solarIrradianceKwhM2":163.9,"windSpeedAvg":4.84,"relativeHumidity":71.6,"outsideTempOnHeatingDays":15.07},{"month":7,"outsideTemp":19.36,"heatingDays":10,"degreeDayNum":20,"solarIrradianceKwhM2":162.2,"windSpeedAvg":4.71,"relativeHumidity":70.6,"outsideTempOnHeatingDays":16.04},{"month":8,"outsideTemp":19.11,"heatingDays":11,"degreeDayNum":23,"solarIrradianceKwhM2":143,"windSpeedAvg":4.47,"relativeHumidity":69.9,"outsideTempOnHeatingDays":15.93},{"month":9,"outsideTemp":14.16,"heatingDays":26,"degreeDayNum":121,"solarIrradianceKwhM2":94.7,"windSpeedAvg":4.88,"relativeHumidity":75.3,"outsideTempOnHeatingDays":13.35},{"month":10,"outsideTemp":8.88,"heatingDays":30,"degreeDayNum":282,"solarIrradianceKwhM2":59.2,"windSpeedAvg":5.05,"relativeHumidity":80.5,"outsideTempOnHeatingDays":8.86},{"month":11,"outsideTemp":3.78,"heatingDays":30,"degreeDayNum":426,"solarIrradianceKwhM2":30.7,"windSpeedAvg":5.1,"relativeHumidity":85.3,"outsideTempOnHeatingDays":3.78},{"month":12,"outsideTemp":-0.45,"heatingDays":31,"degreeDayNum":572,"solarIrradianceKwhM2":21.5,"windSpeedAvg":5.44,"relativeHumidity":84.7,"outsideTempOnHeatingDays":-0.45}],"groundTemp1m":9.14,"groundTemp2m":9.14,"solarIrradianceKwhM2Year":1132,"windSpeedAvg":5.15,"relativeHumidityAvg":76.8,"suitability":{"score":64,"rating":"fair","color":"yellow","estimatedScop":4.1,"notes":["Wysokie nasłonecznienie — bardzo dobre warunki dla hybrydy pompa ciepła + PV.","Wysoka średnia prędkość wiatru (5.2 m/s) — większe straty przez infiltrację."]},"_meta":{"source":"OPEN_METEO_ERA5_LAND_1991_2020","sourceLabel":"ERA5-Land Reanalysis (1991–2020)","fetchedAt":"2026-05-19T12:28:25.719Z","attribution":"Weather data by Open-Meteo.com (CC BY 4.0)","legalRef":"PN-B-02403:1982 (climateZone, standardOutsideTemp)","apiVersion":"v1"}}