During the FJA Invitational, I mentioned to the guys in my group, a study I did while studying engineering at Texas A&M back in the '70's. Briefly, I talked the golf team into helping me with a study for my kinetics class. Namely, does temperature affect how a golf ball flies. The assumption being that, in cooler weather, the ball would not compress as much and therefore, not fly as high or as far as it might in warmer temperatures. The finding were very enlightening and, given it is winter, perhaps they will help y'all.
We started on a September day at roughly 95 degrees F. The guys hit drivers, 3 irons, 6 iron and 9 irons. We did this on later dates at various temperatures. What we found was at 65 degrees F, there was almost an 8 yard loss in distance compared to 95 degrees and, at 45 degrees F, there was another 8 yard loss in distance - WITH EVERY CLUB.
In closing, if you find you are coming up short this winter, it's not you, it's Old Man Winter. I truly hope this helps you play better golf this winter.