There's no use denying the stickiest of August's dog days have arrived in Washington!  Nights are providing no relief from very hot and humid days that have been featuring heat indices in the upper 90s and soppy dew points in the 70s.  With a Bermuda high in the western Atlantic pumping in the offensive air, there is little relief when the sun goes down. The "lows" at Reagan National haven't been falling much below 80, and the humidity levels are always uncomfortably high. 

Today started out extremely muggy and warm - it was 80 at Reagan National at 4 AM -  with highs expected to reach the lower 90s this afternoon.  Isolated showers and thunderstorms could provide some temporary relief from the oppressive heat.  Sunday should be similar, but it will be a breezier day with a greater chance of showers as a strong cold front moves toward the mid-Atlantic .  Some of the storms could be severe in the late afternoon and evening.  Somewhat cooler days are expected in the wake of a front on Monday and Tuesday.

Note: One other statistic to confirm this has been an insufferable summer is there have been just two days since June 6 when the average daily temperature fell into the 60s.  The temperature averaged 67 degrees on June 18 and 69 degrees on July 21.  Every other day has seen averages in the 70s and 80s, much too warm for open windows!