We have seasons where I live. At least four of 'em - possibly more. Right now, it's Winter.
We got a little snowstorm on Monday, which left about 8". The plows had things cleared up as best they could on Wednesday, which means wet main roads with car snot in the bike lanes and side streets scraped down to about 2" of hard packed snow. Most of the off-road MUPs have been similarly scraped down (with the exception of a few that they didn't bother with.) Highs have been around 30F, lows around 15F.
That said, it's been beautiful weather for riding with studded tires. Bike travel would be more challenging but not impossible with regular MTB or cyclocross tires. A fatbike would be ideal for a few of the paths, but I've discovered some nice low-traffic alternate routes with ice but not deep snow.