A cold front will pass through the area late Sunday, allowing somewhat cooler and less humid air to build into the area Monday and Tuesday.
Daytime highs will return to normal levels -- in the lower 80s. Overnight lows will drop into the 50s for a few nights as well. (August 7th is the only day this month with a low below 60°)
Dew points, which have been in the upper 60s and lower 70s, will finally drop into the mid 50s on Monday. Once the dew point gets below 60, it feels very comfortable.