Ditto to what Snoopy told you. For me the cold causes problems when the temps drop below 52 F (or higher if wind chill). (I, too, am heat intolerant.)
I cycle downward annually around Nov/Dec. If you track your symptoms, you may find seasonal effects will follow you too.
BTW, there are no stupid questions!! Remember, anything that causes stress in your environment causes stress to your body and can cause your MS to affect you.