National Weather Service and local forecast models indicate Austin will likely see a high near 102–104°F on August 20 under persistent high pressure, with light southerly flow and minimal cloud cover limiting cooling. This setup, typical of late-summer Texas heat, supports the market’s leading 50% implied probability on 102–103°F while keeping 104–105°F at 17.5%. Recent observations show consecutive days in the low-to-mid 100s with no frontal passage expected, though slight model spread on mixing depth and dew points could shift the peak by a degree or two. Updated NWS guidance and real-time observations on the 20th will determine the exact maximum.