{"location":{"city":"Jelnia","voivodeship":"Łódzkie","community":"Gmina Drzewica","postalCode":"26-340","latitude":51.4324,"longitude":20.4428,"elevation":188},"climateZone":3,"standardOutsideTemp":-20,"annualMeanTemp":8.8,"monthly":[{"month":1,"outsideTemp":-1.72,"heatingDays":31,"degreeDayNum":611,"solarIrradianceKwhM2":25.5,"windSpeedAvg":5.84,"relativeHumidity":84.1,"outsideTempOnHeatingDays":-1.72},{"month":2,"outsideTemp":-0.65,"heatingDays":28,"degreeDayNum":527,"solarIrradianceKwhM2":44,"windSpeedAvg":5.74,"relativeHumidity":82.3,"outsideTempOnHeatingDays":-0.65},{"month":3,"outsideTemp":2.89,"heatingDays":31,"degreeDayNum":468,"solarIrradianceKwhM2":87.8,"windSpeedAvg":5.76,"relativeHumidity":76.7,"outsideTempOnHeatingDays":2.89},{"month":4,"outsideTemp":8.68,"heatingDays":29,"degreeDayNum":280,"solarIrradianceKwhM2":128.3,"windSpeedAvg":5.18,"relativeHumidity":70.9,"outsideTempOnHeatingDays":8.55},{"month":5,"outsideTemp":13.85,"heatingDays":26,"degreeDayNum":136,"solarIrradianceKwhM2":160,"windSpeedAvg":4.97,"relativeHumidity":70.9,"outsideTempOnHeatingDays":12.86},{"month":6,"outsideTemp":17.34,"heatingDays":17,"degreeDayNum":51,"solarIrradianceKwhM2":164.9,"windSpeedAvg":4.87,"relativeHumidity":70.7,"outsideTempOnHeatingDays":15.08},{"month":7,"outsideTemp":19.33,"heatingDays":10,"degreeDayNum":20,"solarIrradianceKwhM2":162.4,"windSpeedAvg":4.7,"relativeHumidity":71.1,"outsideTempOnHeatingDays":16.09},{"month":8,"outsideTemp":19.05,"heatingDays":11,"degreeDayNum":23,"solarIrradianceKwhM2":140.9,"windSpeedAvg":4.49,"relativeHumidity":70.3,"outsideTempOnHeatingDays":15.92},{"month":9,"outsideTemp":14.2,"heatingDays":25,"degreeDayNum":120,"solarIrradianceKwhM2":92,"windSpeedAvg":4.97,"relativeHumidity":75.8,"outsideTempOnHeatingDays":13.34},{"month":10,"outsideTemp":9.05,"heatingDays":31,"degreeDayNum":277,"solarIrradianceKwhM2":56.4,"windSpeedAvg":5.3,"relativeHumidity":80.8,"outsideTempOnHeatingDays":9.04},{"month":11,"outsideTemp":4.11,"heatingDays":30,"degreeDayNum":416,"solarIrradianceKwhM2":27.9,"windSpeedAvg":5.36,"relativeHumidity":85.7,"outsideTempOnHeatingDays":4.11},{"month":12,"outsideTemp":-0.01,"heatingDays":31,"degreeDayNum":558,"solarIrradianceKwhM2":18.9,"windSpeedAvg":5.71,"relativeHumidity":85.3,"outsideTempOnHeatingDays":-0.01}],"groundTemp1m":9.26,"groundTemp2m":9.26,"solarIrradianceKwhM2Year":1108.9,"windSpeedAvg":5.24,"relativeHumidityAvg":77,"suitability":{"score":67,"rating":"good","color":"lime","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":"2026-05-19T12:12:39.908Z","attribution":"Weather data by Open-Meteo.com (CC BY 4.0)","legalRef":"PN-B-02403:1982 (climateZone, standardOutsideTemp)","apiVersion":"v1"}}