Spring (March-early May) and fall (mid-September to mid-November) are the best times to visit. Generally comfortable humidity and daytime temperatures of 65-87 F/18-31 C are the norm then. Thunderstorms with heavy rain, hail and sometimes tornadoes are frequent in spring, especially in late afternoon.
Summer highs average 95-96 F/35-36 C. July and August are the hottest months, and it's not unusual for temperatures to top 100 F/37 C—sometimes for several days in a row. In addition to the heat, humidity can be high in summer, and the combination can be uncomfortable.
Winters are typically mild with lows around 25-32 F/1-3 C and highs in the 50s F/10-15 C, but the area can be hit by ice storms and light snows that make roads extremely hazardous.