I definitely notice my symptoms flaring up, lev, but I don't think it has anything to do with temperature. I know you've come a long way, but that question indicates that there is still a part of you that is thinking physically instead of emotionally.
I believe that what we're experiencing is a mental and emotional reaction to the change in seasons and the shorter days, to leaves turning brown and trees becoming bare. Traffic is worse with everyone back in school, the stress of the holidays is coming soon, and another year is ending, which just reminds us of the passage of time and of our inevitable mortality.
In other words, always remember to Think Psychological, not physical.