sleet
霙 centers on a specific wintry mix: sleet, the icy rain that falls when snow partially melts.
霙 combines 雨 (rain) with 英, which likely provides the sound エイ and may suggest a falling or scattering idea, together indicating sleet.
Rain 雨 falls from the sky, and the bottom part 英 looks like a flower being pelted by icy drops. Picture sleet hitting the petals: 霙 is sleet.
For エイ, imagine an 'A'-shaped sleet pellet hitting the ground: 'A' -> エイ, and the icy rain bounces off the flower.