To add an importnt point. Anything larger than 0.5mm droplet size is freezing precipitation - and definitely must be avoided, even if you have an icing clearance.
A good rule of thumb for this is that if the moisture in the air is descending (as opposed to drifting around), then the droplet size is larger than 0.5mm.
Freezing mist is bad enough, freezing precipitation is much, much worse.