Winter is taking it's time leaving up here too. Still 3 ft of snow in the bush but it's starting to settle a bit. We get some nice sunny weather or better yet a bit of rain and we'll be in full melt. Two or three weeks after that it'll be blackfly seaason. Oh Yeah.
Back to your question. If I'm not hunting and just punching paper, 15-20'F is good shooting temps. Much colder than that the fingers don't work too well.
HA