Maybe it's just me...but I think Russell struggles in the rain/wind. Although I do believe he is now 6-0 in the rain, I think the weather affects his handling of the ball (and we know how huge his hands are).
I was at the home game vs Oakland and against that team at home, Russ had 0 tds, a pick and just looked off target. The next home game vs the Giants where the weather was similar, he threw 0 TDs and two picks.
Sunday's game, 4 picks and remember how bad the weather was vs New Orleans in the playoffs last year, Russ had 100 yards no tds, no picks.
I'm confident he'll play noticeably better in Arizona...but that's just an observation.