Who knows what the climate is like in Austin, Texas, USA? Is it hot in summer?

I'm in Dallas, near Austin, where I play. The weather there is not very hot, but very, very hot! ! ! ! Summer is basically above 40 degrees Celsius, the sun is sunny, and there are no clouds in Wan Li, which is simply insolation, but it is not sultry, which is not quite the same as in China, and the temperature difference between morning and evening is quite large. In spring and autumn, the temperature difference in a day can reach more than 30 degrees Celsius. It is also very cold in winter.