OOC: I'm going to say that it's late spring, as I don't want to spring a Missouri winter, even post apocalyptic on you guys at the moment. To tell the truth, I don't think winter's were really covered in Fallout Tactics. Lemme check the Bible. Well, the only mention of winters in the Fallout Bible was a vague reference to a Great Winter in 2173, as well as Avellone and fans musing about nucleur winter. I'm going to say that there will be a somewhat traditional winter.
As for what temperature it is right now, I'm going to say low 70s. It'll be kind of chilly, but probably not enough to worry about.
As for water, give me a Survival check if someone wants to go out and forage.