We do not recommend renting a car. If you're staying downtown, you'll be able to walk to restaurants, bars, and more. It's also easy and inexpensive to navigate the city using a ride share service, like Lyft or RideAustin. If you decide to rent a car, please keep in mind that parking can be challenging and expensive in downtown Austin.
Early October in Central Texas is still quite warm. Expect highs in the mid-80s and lows in the mid-60s. For an up to date weather forecast, please visit: https://www.accuweather.com/en/us/austin-tx/78701/october-weather/351193