This icon is three small lines, staggered in an alternating way with half of a crescent moon shape drawn over it. The moon shape begins on the top of the top line and goes down on the right side of the three lines ending on the end of the third line.
Related to Fog Icon
Related icons are the icons with matching tags, as well as all weather icons. All icons are in the same flat style. You can either download free PNG icons or buy SVG vectors