title_body: How can I talk about weather without expletives?
upvoted_answer: There are also language with impersonal verb conjugation, and of course, nothing prevents a verb from being used only in the impersonal. Nahuatl has an impersonal voice, but because it's only used with verbs that normally have animate subjects, its weather verbs function much like Spanish's, ironically enough.
  
  In my own conlang Mfalen, weather verbs function as descriptors, so one says the equivalent of "X is raining" (i.e. It's raining on/in X) the same way one says "X is cold" or "X is windy" (or indeed, "X is red").