Forecasts from NOAA and NWS models indicate Austin’s overnight low on August 29 will likely fall in the mid-70s amid a persistent warm, humid airmass and light southerly winds that limit radiational cooling under mostly clear skies. Market-implied odds cluster tightly between the 70–77°F buckets because small differences in dew point, wind speed, or residual cloud cover can shift the minimum by a few degrees, while the 33% on 86°F or higher captures residual model spread and the possibility of warmer-than-expected boundary-layer mixing. Historical late-August averages near 72°F provide context, but the current pattern lacks any approaching front or enhanced subsidence that would allow deeper cooling, keeping probabilities anchored to the upper-70s range until the final evening observations.