Many bettors will hear all the touts saying bet under on windy games. But after adding all those little things up the impact can be much more than one might think.
Save for those and some other extreme examples, though, the effect on any single play is small, even imperceptible. Sometimes it can really affect these things, like this kick, or deciding to choose which side of the field to defend instead of receiving the ball in sudden death overtime ( thanks, Marty!). What effect does wind have on the game? It only truly affects two things - the ball in the air (passes and kicks) and decision making (play calling, fair catches, etc).