Snow.js

let icon = '';

fetch('http://dataservice.accuweather.com/forecasts/v1/daily/1day/324505?apikey=SD3IOUbAchPsZCz6KJoAfdoReCkm2wbk&metric=true')
    .then(function (resp) { return resp.json() })
    .then(function data(data) {
        console.log(data);
        icon = data.DailyForecasts[0].Day.Icon;
        const elem = document.getElementById('icon');
        elem.src = `https://www.accuweather.com/images/weathericons/${icon}.svg`
        atr = elem.getAttribute('src')
        console.log(atr);
        elem.onload = function () {
            var canvas = document.getElementById("canvas_icon");
            var ctx = canvas.getContext("2d");
            ctx.drawImage(elem, 100, 100);
        };
        interval = setInterval(elem.onload, 33)
    })
    .catch(function () { });

console.log(icon);

if (icon === 29 || (icon >= 19 && icon <= 23)) {

    $(document).ready(function () {

        //canvas init
        var canvas = document.getElementById("canvas");
        var ctx = canvas.getContext("2d");

        //canvas dimensions
        var W = 500;
        var H = 500;
        canvas.width = W;
        canvas.height = H;

        //snowflake particles
        var mp = 25; //max particles
        var particles = [];
        for (var i = 0; i < mp; i++) {
            particles.push({
                x: Math.random() * W, //x-coordinate
                y: Math.random() * H, //y-coordinate
                r: Math.random() * 4 + 1, //radius
                d: Math.random() * mp //density
            })
        }

        //Lets draw the flakes
        function draw() {
            ctx.clearRect(0, 0, W, H);

            ctx.fillStyle = "rgba(255, 255, 255, 0.8)";
            ctx.beginPath();
            for (var i = 0; i < mp; i++) {
                var p = particles[i];
                ctx.moveTo(p.x, p.y);
                ctx.arc(p.x, p.y, p.r, 0, Math.PI * 2, true);
            }
            ctx.fill();
            update();
        }

        //Function to move the snowflakes
        //angle will be an ongoing incremental flag. Sin and Cos functions will be applied to it to create vertical and horizontal movements of the flakes
        var angle = 0;
        function update() {
            angle += 0.01;
            for (var i = 0; i < mp; i++) {
                var p = particles[i];
                //Updating X and Y coordinates
                //We will add 1 to the cos function to prevent negative values which will lead flakes to move upwards
                //Every particle has its own density which can be used to make the downward movement different for each flake
                //Lets make it more random by adding in the radius
                p.y += Math.cos(angle + p.d) + 1 + p.r / 2;
                p.x += Math.sin(angle) * 2;

                //Sending flakes back from the top when it exits
                //Lets make it a bit more organic and let flakes enter from the left and right also.
                if (p.x > W + 5 || p.x < -5 || p.y > H) {
                    if (i % 3 > 0) //66.67% of the flakes
                    {
                        particles[i] = { x: Math.random() * W, y: -10, r: p.r, d: p.d };
                    }
                    else {
                        //If the flake is exitting from the right
                        if (Math.sin(angle) > 0) {
                            //Enter from the left
                            particles[i] = { x: -5, y: Math.random() * H, r: p.r, d: p.d };
                        }
                        else {
                            //Enter from the right
                            particles[i] = { x: W + 5, y: Math.random() * H, r: p.r, d: p.d };
                        }
                    }
                }
            }
        }

        //animation loop
        setInterval(draw, 33);


    })

}