Should be fine, a really nice time to go
Average 22-25 degrees September (although you're heading into October and the average temp is slightly lower) and small chance of any rain ( a little greater chance in the west than the east). Might be a little chillier in the evenings, so take a light jacket or something for the evenings. Have a great time

been there thrice at this time of year twice it was touching the late 90s once late 80s i know plenty of peeps who have been at this time every year and they come back with cracking bronzy