To begin with some good news: this week is likely the hottest week of the summer. We likely won't see these temperatures again this year.
Next week starts nice, ends not so nice, ie cool and unsettled.
The coolness is seeming to continue in the following weeks:
Five day period temperature anomaly starting the 28th:
Five day period temperature anomaly starting Aug 4th:
From the same model, December temps:
From the JAMSTEC model, their winter temperature forecast: