Not sure if it's a bug or just not programmed in or what, but during a hurricane, all the NPCs (townies and enemies alike) are dripping as if struck with a water gun, while the player character isn't. I reloaded the world without Calamity enabled in case that was the issue, but when I did, the hurricane managed to end right as I loaded in, so I have no way of confirming if it's Calamity's fault or not until I get lucky enough to stumble upon another hurricane. May also be worth noting that along with mobs and items (which really book it in hurricanes; it's actually pretty funny to watch) getting pushed, hurricanes also push other entities like bullets and grappling hooks. Unsure if this is intentional, so I'll point that out too while I'm at it.
EDIT - Hurricane Report 2: Got another hurricane while I was expanding my town. When I went to leave, disable Calamity, then go back in, the hurricane immediately ended, telling me that the weather ends when you close the world. Unsure if this is the case for all weathers or even if there's anything that can be done about it, but when in doubt, make note of it. This time though, another strange thing worth noting happened.
When the rain was coming straight down, I was a bit suspicious, thinking it was just the heavy rain weather at work. So using the power of cheat codes, I grabbed a weather radio to check what was going on, and found that despite the hurricane being live, it wasn't kicking the wind speed up to 100 like it normally should. It also had no effect on items like it usually does; all I got from this hurricane was a lot of rain. Unsure what could be causing this, but I'll keep Calamity off and wait & see if I can get another one to happen while doing town expansion.