Does your system sound change with the seasons?

I have a highly resolving system of around 50k. Is it just me and am I nuts thinking that my stereo sounds better in the winter months? Every year the same thing. The sound is less harsh and is a more pleasurable experience in the winter months. Not by a whole bunch but I hear a subtle but definite difference in the tones. What I'm hearing can't be in the high frequencies. I'm 60 years old. I do not let the humidity dip below 40% in the winter in my dedicated music room. If it dips into in the mid 30s things don't sound right.  I installed extra ductwork to help it stay cool in the summer. My room used to get hot from my big amp in the summer. A hot room does not sound as good to me. I have done some research on hearing abilities during the different seasons but there is not a whole lot of info out there. I did find that high humidity is detrimental to sound quality. Water is reflective in nature. Just holler across the lake at night and listen to the response a mile away. "Musicians in outside orchestras would notice the harshness of the sound from rising humidty before a storm approaches. They would call it the bloom before the thunderstorm" Laura Dearborn, Good Sound. Thanks for reading.