Even though the temperature outside tied the record 38°C set 70 years ago, I'm happy to report that Inner Drive Technology World Headquarters has remained tolerably cool:
Those are degrees Celsius vertically and the last 24 hours of time horizontally. The lower temperatures overnight come from me turning the air conditioning to a cooler setting in the evening and back up in the morning.
What you can't see in this snapshot is that during our last hot, hot summer (2008), I had trouble keeping the office below 27.5°C. That's where the server fans spin up, power consumption skyrockets, and the electronics within the servers start crying. So far in the last two months, I've only had about three hours total above that threshold temperature, caused not by inadequate air conditioning but by me not closing the windows and turning the AC on in the first place.
I credit the window replacement completed in December 2010. Since 2011 had neither a particularly harsh summer nor a harsh winter, it was harder to see this data before.
Also, having turned off 40% of my servers probably helped.
Still, I do not want to go outside right now...