{"location":{"city":"Franopol","voivodeship":"Mazowieckie","community":"Sarnaki","postalCode":"08-220","latitude":52.3321,"longitude":22.8834,"elevation":155},"climateZone":4,"standardOutsideTemp":-22,"annualMeanTemp":8.4,"monthly":[{"month":1,"outsideTemp":-2.56,"heatingDays":31,"degreeDayNum":637,"solarIrradianceKwhM2":23,"windSpeedAvg":5.66,"relativeHumidity":85.5,"outsideTempOnHeatingDays":-2.56},{"month":2,"outsideTemp":-1.63,"heatingDays":28,"degreeDayNum":554,"solarIrradianceKwhM2":41,"windSpeedAvg":5.62,"relativeHumidity":83.5,"outsideTempOnHeatingDays":-1.63},{"month":3,"outsideTemp":2.1,"heatingDays":31,"degreeDayNum":492,"solarIrradianceKwhM2":85.3,"windSpeedAvg":5.69,"relativeHumidity":77.1,"outsideTempOnHeatingDays":2.1},{"month":4,"outsideTemp":8.36,"heatingDays":29,"degreeDayNum":289,"solarIrradianceKwhM2":126.7,"windSpeedAvg":5.16,"relativeHumidity":70.6,"outsideTempOnHeatingDays":8.25},{"month":5,"outsideTemp":13.85,"heatingDays":26,"degreeDayNum":136,"solarIrradianceKwhM2":161.9,"windSpeedAvg":5.03,"relativeHumidity":69.5,"outsideTempOnHeatingDays":12.81},{"month":6,"outsideTemp":17.35,"heatingDays":17,"degreeDayNum":51,"solarIrradianceKwhM2":165.7,"windSpeedAvg":4.88,"relativeHumidity":69.8,"outsideTempOnHeatingDays":15.12},{"month":7,"outsideTemp":19.44,"heatingDays":10,"degreeDayNum":19,"solarIrradianceKwhM2":163.8,"windSpeedAvg":4.68,"relativeHumidity":70.7,"outsideTempOnHeatingDays":16.11},{"month":8,"outsideTemp":18.88,"heatingDays":12,"degreeDayNum":25,"solarIrradianceKwhM2":140,"windSpeedAvg":4.58,"relativeHumidity":70.2,"outsideTempOnHeatingDays":15.88},{"month":9,"outsideTemp":13.86,"heatingDays":26,"degreeDayNum":129,"solarIrradianceKwhM2":89.7,"windSpeedAvg":4.96,"relativeHumidity":76.2,"outsideTempOnHeatingDays":13.18},{"month":10,"outsideTemp":8.34,"heatingDays":30,"degreeDayNum":299,"solarIrradianceKwhM2":54.3,"windSpeedAvg":5.31,"relativeHumidity":81.3,"outsideTempOnHeatingDays":8.32},{"month":11,"outsideTemp":3.34,"heatingDays":30,"degreeDayNum":439,"solarIrradianceKwhM2":25.2,"windSpeedAvg":5.38,"relativeHumidity":86.2,"outsideTempOnHeatingDays":3.34},{"month":12,"outsideTemp":-0.88,"heatingDays":31,"degreeDayNum":585,"solarIrradianceKwhM2":16.4,"windSpeedAvg":5.51,"relativeHumidity":86.9,"outsideTempOnHeatingDays":-0.88}],"groundTemp1m":9.03,"groundTemp2m":9.03,"solarIrradianceKwhM2Year":1093,"windSpeedAvg":5.21,"relativeHumidityAvg":77.3,"suitability":{"score":60,"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":"2026-05-19T12:18:32.068Z","attribution":"Weather data by Open-Meteo.com (CC BY 4.0)","legalRef":"PN-B-02403:1982 (climateZone, standardOutsideTemp)","apiVersion":"v1"}}