Weather, weather, weather. This is July ask one of the climate change gurus or get a farmers almanac. I would depend on the ten day forcast.
X2
My personal cutoff is September when heading west on any of the more northern routes. Yea you can do it but you never know when a snowstorm hits and then you are on the side lines waiting for them to clear the roads. And then there is the chains issue required in some states.
I-10 is the safer route to go late in the season but then again you really have to watch the weather before you head out.
I tried leaving Wisconsin in November to go to Florida and I had to sit and wait and wait for the weather to clear. It's a **** shoot anyway you look at it.
