You're right, training in freezing cold weather is not as conducive to improving one's game as playing in warmer weather. One excuse that I hear for us playing during the winter is competition for field time in other seasons but I don;t really buy this since other regions of the country manage.
Of course, if the main concern is our kids getting some exercise and bonding with new friends, then they can play anytime of the year.
Well, I agree. But, I think our higher level players should be put in leagues that run Spring-Summer-Fall. Our rec players that are out simply for fun and bonding can play in the colder months. The reason I say have a distinction is because the technical/tactical training for the higher level players is "more important." Thus, having better weather to train in is more conducive to a more technical type of training. I am sure this will be read as insensitive to the rec-minded player, but that's not what I am trying to get across.