There's climate change, and you both know a god associated with the weather. I think that's the best advice I can offer about the weather.
Doom-wise? Don't pick the 4th, 8th, or 11th for it. In fact, don't go anywhere on the 4th. At all. The only task good for that day is cleaning house. And don't travel on the 4th or 8th. Everything else should be fine. Including the universe.