When I think combat boots I think black boots? Are you looking specifically for black boots?
I highly recommend the Danner RAT boot. It's not black. But the Goretex versions are waterproof. They're comfortable right out of the box. They're made with thick nubuck leather and heavy duty canvas. Vibram rubber lug soles. I have these boots. I love these boots. They are waterproof. They dry fast. They have speed lacing. They're made in America if that matters to you. And because they had a military contract to make these they come in at 100 bucks after taxes. Danner Men's USMC RAT Boot, 8",... https://www.amazon.com/dp/B006JUYHKO?ref=ppx_pop_mob_ap_share
Check out Danner. Specifically the Danner USMC RAT boot. I got mine on sale for $80 USD. It's made in the USA. Full grain leather outer. Lined with Gore-Tex. I can attest these are waterproof. They are also very comfortable right out of the box. Made with Vibram sole. If all you're looking for is the occasional use boot that will have your back in the conditions you listed, this is my personal recommendation. I have Red Wings. I have a pair of Nicks. But these Danner are my shit kicker/ beat the hell out of and not care boots. I love them. Danner Men's USMC RAT Boot, 8",... https://www.amazon.com/dp/B006JUYHKO?ref=ppx_pop_mob_ap_share