Forecast high is 74F for 10/7 vs. the high of 72F on 9/24 and the temp is forecast to be about 55F at the end of the game (10:30 pm) vs. the 56F I noted at the end of the game in the yellow lot after Iowa. The sunset is about 20 minutes earlier than it was on 9/24, which is a non-issue, and currently the forecast is for <10 mph winds on 10/7, which is comparable to the winds on 9/24. So it will not be cooler than it was for Iowa, unless something in the forecast changes. I was in a t-shirt and shorts for Iowa and was quite comfortable and intend to be dressed similarly for Nebraska. I'm sure you'll be in your parka.
And with regard to the threat for a light shower or two, no models are showing any showers for CNJ during the game or tailgates. The closest light showers are in NWNJ/Poconos in the evening and even these are scattered and would only put down about 0.01-0.02" of rain, which is definitely nuisance level.
LONG TERM /FRIDAY THROUGH MONDAY/...
The dry pattern that begins during the short term continues into the
weekend. An upper trough across the Northeast states and Middle
Atlantic flattens and is replaced with more zonal from by late
weekend. A short wave will move through early next week. The only
surface feature of significance will be a cold front which will move
across the area Fri night.
The forecast is dry through the period. High pressure will prevail
with only a cold front moving though late Friday. I have kept the
slight chance of showers (from the earlier forecast) in for the
southern Poconos and northern NJ for Fri night. Temperatures will be
a little above normal Friday but after that, a turn towards chilly
autumn temperatures is expected.