As a further bit of information, I thought that photos would be handy.
Notice the difference between the first pic from July and the second pic from January. The dew points in July were in the 60s. The dew points for January have ranged from below zero into the teens – very dry. That change in curl is what a change in dew point can do to curl pattern. It’s not a bad thing; it’s just climate in action! In the summer I get shorter, curlier hair, and in the winter, I a get a looser curl pattern that looks longer.
And yes, that is a a duckie shower curtain. I like duckies.