Current National Weather Service and model guidance indicate Houston will experience typical late-summer overnight conditions on August 22, with the daily minimum most likely falling in the mid-to-upper 70s amid a persistent subtropical ridge. High dew points near 75°F limit radiative cooling despite mostly clear skies, while light winds and the urban heat island effect further anchor lows above climatological norms around 78°F. Ensemble spreads in short-range forecasts introduce modest uncertainty across the 74–85°F range, reflecting small variations in cloud cover and boundary-layer moisture that could shift the exact minimum by a degree or two. Official observations from Houston Hobby or Intercontinental will resolve the market once the calendar day ends.