May be tricky to reproduce so the screenshot attached shows coordinates and facing direction. Best seen when rain is starting or stopping.
MC-197124
Sometimes dark rain can be seen in the distance
Open
4
muzikbike
(Unassigned)
Confirmed
Particles
1.16.2 Pre-release 2, 1.16.2, 20w51a, 1.19.3, 23w06a, 1.21.4
Retrieved
For the record, your PC does actually not meet the minimum system requirements for the game - but it's so close that I assume similar devices have the same issue, plus it might not be GPU-specific in the first place.