When it's the humid season, transport to other DLCs from Hamlet, and then come back. The rain and the fog are invisible, but the wetness still increases.
Besides, characters will say wearing hats and clothes is too hot indoors, but they won't be slowed. This bug has existed for a long time.
Fix these bugs, please? MANY THANKS UNTO YOU, UNPIG DEVELOPERS.
Wait until the rain and the fog appear in the humid season, transport to other DLCs, then come back.