Depressing Stats....does the weather really matter that much

[jeffreymccoy]

Im very new at this, and was feeling great about the gains acheived with aero mods alone. My best tank has been just over 26mpg.

With all mods in place, I was testing at 25.5mpg on a test route.

Now, rain and cooler weather have set in and I only get 20-21 on that stretch of the test route, if I work really hard at it.

Does the weather really have that much to do with my FE? Im really down about the losses over the weather...its discouraging at best, and makes me wanna forget the whole thing at worst.