Mirrors my experience... coldest I've flown in was in the 20s in January... Shorter flight time, with that immediate voltage drop, but then normal flight duration from that lower voltage level. Between temperature and still being about 5500 feet ASL at the time gave me about 6-7 minutes...
As far as snow... if a very light snow in January, with that dry fluff, I might risk maybe 30 seconds... but if you're talking the heavy wet snow of March... the aircraft is not water resistant at all.
As far as snow... if a very light snow in January, with that dry fluff, I might risk maybe 30 seconds... but if you're talking the heavy wet snow of March... the aircraft is not water resistant at all.