You are correct. That is why in the summer time when people are getting some sun, your body does not crave carbs. No one wants a big bowl of pasta in the summer time. Instead, you want lighter fare.
Bring on the cloudy days of winter, and your body wants to go into hibernation mode.
Anyone that travels the country alot will notice that people are thinner in warmer climents, vs heavier in the colder areas.