So there is precedence for a Concacaf team to do just this - whine about the weather during WQ qualifying - and force a replay/draw?
Costa Rica tried to in 2013 after a
snow game against the US in Denver though were unsuccessful because they wanted to continue during the game and protested afterwards.
If they had refused to continue playing and forced the referee to abandon the match they would've forced a replay or a potential draw (or just give the US the win since it was the second half and the US lead 1-0).
The hypothetical is this:
Costa Rica (or Mexico) shows up in Edmonton and either pregame or in the first half it begins to snow (not unheard of as Edmonton averages about 21cm of snow in November).
Costa Rica, having been through the mess in Denver in 2013, says "heck no we ain't doing this again" and refuses to continue.
Referee and Match Commissioner agree, match is suspended due to snow and icy field conditions. Forecast indicates snow for the rest of the night so the match will have to played/restarted the next afternoon.
Costa Rica says "no can do, we're flying commercial and our itinerary cannot be changed to get us back home in time for our next match in three days, we're out of here."
FIFA ultimately says "there's no space in the international calendar to make this game up before the qualifying deadline, the match will be considered a draw."