I’m sure a real weatherperson could do a better job but look at tomorrow’s weather channel forecast:
If you look at states that matter / are close:
Dallas, TX — rain/storms
Northwest Ohio/Southeast Michigan (Detroit, Ann Arbor, Toledo) — rain
Indiana — rain across the state (not close for president, but we need Bayh to win)
Everywhere else looks clear. There are other southern states where it will rain but I don’t think there are any close house/senate elections and those states should be solid Trump.