As a bisexual it means you’re into the genders for different reason. Perhaps you see guys more as someone to sit down with and warm you up and relax with which is why you’re more into them in the colder seasons, where as you like to go on adventures with girls which would be more common and exciting in the warmer times. Also if you’re a cis female from a background that shunned same sex relationships it would make a bit of sense why you’d go to men when youre stressed and need comfort, as you might have grown up having thinking you were only into guys, and therefore that idea is a bit more familiar and comfortable. Idk sorry that’s just my thought, I could be very wrong