Not really, several attempts were made for Oblivion and Fallout, they either turned out glitchy or had major performance issues, the latter being the reason I think Bethesda will not correct the rain, it's just too heavy going on major open worlds, especially on consoles.
I recall a fix for Morrowinds rain. I didn't know about Oblivion. And Fallout had rain? :blink: Regardless, in a few years, I'm certain (52.6512% sure) modders will fix the rain in OB and Fallout. I'd think Skyrim would be the same. So PC users
may be in luck in 5 or more years, if MW is any indication. One can hope at least...