Does your mileage decrease between seasons?

[Mister-B]

When winter hit, I adjusted my carb so it would start and idle properly. Now we're getting closer to warm weather, but not quite there. It can be really cold in the morning, and then warm in the afternoon.

I've noticed my mileage seems worse than usual. Haven't calculated it, but it sure seems like it. I take it this must be normal this time of year? Should I go ahead and just adjust my carb for the warmer weather, and then adjust it again once summer hits?
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