new member here and just saw this thread.. i know it's old and hasn't been replied to for a while, but i had the same exact issue.
my weather station only works on the 2.5ghz wireless network and my router dual broadcasts the 5ghz network.
i had to go into the settings and disable the 5ghz network to get it it to work. no issues since then, i also changed the wifi channel to 11.
otherwise, my station would connect, but then disconnect after two hours. been going strong now for almost 3 days without a hiccup. worth a shot.