The Monday Night Football game last year between the Kansas City Chiefs and San Diego Chargers at Arrowhead Stadium included a heavy dose of rain midway through the game. I remember tracking the weather, thinking we were going to be safe from the rain for most of the game and then, pow, it was raining cats and dogs.
It doesn't look like we'll be seeing weather like that this time around. In fact, it looks like perfect weather for Monday Night Football right now. From The Weather Channel:
So it'll be high-to-mid-50s during the game, basically perfect weather, for what we hope will be a perfect game.