Hi Irena,
Just to add onto Eric's post, you would simply extract the URL from the HTML code; so from his example, simply use
https://embed.windy.com/embed2.html?lat=33.358&lon=-111.764&zoom=7&level=surface&overlay=wind&menu=&message=&marker=&calendar=&pressure=&type=map&location=coordinates&detail=&detailLat=33.355&detailLon=-111.763&metricWind=default&metricTemp=default&radarRange=-1" frameborder="0">
(basically remove the iframe tags)
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You can generate the HTML code directly from the Windy.com site:
1. Click the share button next to their search bar
2. Then click weather radar or Animated map
3. You can copy the HTML code from the lower left of the dialog
Hope this helps,