Days Over 100 In Austin 2025. Summer 2024 was a relatively mild one in austin, counting 32 days over 100º, according to data from camp mabry. The weather channel currently forecasts that the high on august 17 will only be.

Here’s how many are still in the running. Since 2000, the hottest days in austin reached 112 degrees, which was hit in september 2000 and in august 2011.