I just realized that for the first time there were six teams from Asia (AFC) who managed to advance to the world cup. I think this is new history. I have high hopes for South Korea and Japan in this world cup. although the real challenge will definitely be felt for Korea and Japan because considering Qatar is a pretty hot country so I hope it won't be a problem. even some of my brothers who work in qatar say it's so hot there even at work there is someone who installs air conditioning outside the room. This will definitely be a challenge for a team from a country that has cold temperatures.
The hosts always gain automatic qualification, and on top of that there are 4 exclusive slots for AFC. Apart from these, Australia managed to win the playoff against Peru. So in total there are 6 countries from the AFC. All that said, South Korea and Japan are a joke. They have huge fanbase, but they never perform in major tournaments. They look completely clueless when they play against top teams such as Brazil or England.
And now coming to the weather, I don't think that there needs to be much concern. During evening time, the weather is much more tolerable. On top of that, the tournament is taking place during the winter season.