Here are a few links to some I have found recently…
https://www.amcharts.com/free-animated-svg-weather-icons/
https://codepen.io/joshbader/pen/EjXgqr
https://365webresources.com/weather-icon-sets-shouldnt-miss/
http://blogsizzle.com/free-icons/animated-weather-icons-free-download/
https://codemyui.com/pure-css-animated-weather-icons/
https://codemyui.com/animated-weather-icons-in-css/
https://codepen.io/joshbader/full/EjXgqr
https://codepen.io/motorlatitude/pen/CyqDf
http://cssdeck.com/labs/2izqhmuv
hope it helps!!!