You need an API key for openweathermap.org here

async function askWeather() {
    console.log(lat, lon); 
    let u = "https://api.openweathermap.org/data/2.5/weather?"
             +"lat="+lat+"&lon="+lon+"&APPID="+accessKey;
    hava.innerText = "getting weather"
    detay.innerText = ''
    gunes.innerText = ''
    let data = await toJSON(u)
//  fetch(u).then(r => r.json()).then(showWeather)
// }
// function showWeather(data) {
    let w = data.weather[0]; showIcon(w.icon)
    let celsius = convert(data.main.temp).toFixed(0)
    let hh = w.main+"  "+celsius+"°", {sys} = data
    let yy = data.name+', '+sys.country
    hava.innerText = hh; yer.innerText = yy
    lat = data.coord.lat; lon = data.coord.lon
    mahal.value = lat.toFixed(2)+", "+lon.toFixed(2)
    let wind = (3.6*data.wind.speed).toFixed(0)
    let pres = (0.750062*data.main.pressure).toFixed(0)
    const WIND = ['N','NE','E','SE','S','SW','W','NW','N']
    let d = (data.wind.deg/45).toFixed(0)
    detay.innerText = hh  //+'\n'+yy +'\n['+mahal.value+"]"
        +'\nWind  '+wind+' km/h '+WIND[d]
        +'\nPressure  '+pres+' mm'
        +'\nHumidity  %'+data.main.humidity
    let {sunrise, sunset} = sys, noon = (sunrise+sunset)/2
    gunes.innerText = 'Rise '+toHM(sunrise+data.timezone)
        +'\nNoon '+toHM(noon+data.timezone)
        +'\nSet  '+toHM(sunset+data.timezone)
        +'\nZone '+(data.timezone/3600)
    console.log(hh, yy, 'Wind '+data.wind.deg+'° '+WIND[d])
}