The average temperature in Vegas when we are going in mid October is in the mid 80s with less than 1/4" of rain in the ENTIRE MONTH. (http://www.weather.com/activities/travel/businesstraveler/weather/tenday.html?locid=USNV0049) Compare to Philly where the average temperature is in the low to mid 60s!

Come to Vegas. Go to the pool. Get a tan. Sip a cocktail. You'll be glad you did.