Yes, this has been a month of dull and boring consistent mediocrity, in my location and most others the max temp has never been more than 3-4 degrees above the average max. Even in an average month there are usually a period of 4-5 days at 4-8 degrees above the average max.
Even in the below average June just gone places got into the 30's compared with the long term (30-yr) avg. max of 18-20°C (albeit on one day). July was just dull and boring. UK weather at its most tedious. And there were plenty of considerably cold days at least here. I don't call a high of 13°C (on 18th) mild, let alone warm. It's down right cold.
Oh well, roll on August. It will be the warmest month of the summer and even see some southerly winds which could give spells of temperatures of 25-35°C.