A warm airmass with just enough monsoon moisture to keep a few clouds around overnight led to a warm night last night. As of 6 am, the minimum temperature was 78F, although we may have dipped to 77F shortly thereafter (the NWS reports max/min temperatures every 6 hours, so we're waiting for the final numbers).
That will probably make this morning's minimum temperature the highest this month.
It's always tough when you start counting on some cooler weather in late August, but Mother Nature thinks otherwise. Climatology is 88/61, so a minimum of 77 is quite warm.