I work PT for about nine months of the year (Late August thru May 1st) and live in an area that does get winter weather with cold temps as well as ice and snow. Still, I rode to work slightly more than half of the days in 2019, sometimes in temps down in the 30s, sometimes in rain, sometimes in both. My commute isn't long, but riding is about NOT using a car if possible -- and I rode on all days when the weather allowed and I didn't have some off-campus commitment that required a car.
I really like getting to work in nasty weather and having some ask me "Did you ride here today?" I just grin.
I also only spent about $15 on my commuter bike this year (a new chain)...Which allowed me to justify $7500 on a new gravel rig. (Yeah, I'm not good at math.)