Although it's usually the other way around for most people, I don't run well in the cold; however, I don't struggle as much as some other people do in the heat. When I run and it's cold, my stride just doesn't feel smooth, even if I warm up really well. Is there any way I can train myself to run better in the cold?
train for the cold whether. Run while it's cold, take cold showers. If that doesn't work, wear stuff that'll keep you warm while running: tights, sweatshirts, longer socks, etc.
I used to have a lot of problems with my hands and eventually my arms going numb. I started wearing those biker sleaves about 4 years ago and they really helped out. Try racing in those a pair of painter gloves you can through off mid race and a pair of half tights and you should be all set. Just remember, don't strip down until you absolutely have to. Good luck this fall.
Wear more clothes. Take a hot bath before. Our bodies don't have a way of adapting to the cold like you do with the heat (~heat shock proteins, greater blood plasma for hydration, sweating), other than shivering (limited heat) or putting on more fat. This idea of wear as little clothes as possible is bull. Keep yourself warm. Protect your immune system and muscles.