The Aviation weather source I use shows Sat AM through about 1pm being mostly cloudy with some occasional light showers, with the heavier precip staying to the south of us. So tailgating should be ok. However it then shows the precip starting to increase in frequency and intensity around kickoff, with the heavier stuff moving into the area around 4pm. So for whatever that's worth....it doesn't appear we will be playing the game in a driving rain storm, but will have to contend with some showers and possibly extended moderate precip especially in the 2nd half.
for anyone curious, it's www.windy.com and it defaults to the more reliable European model which I've found pretty dang good inside of 48-72 hours....