it gets really hot here in Winters (which is kind of funny given the name of this little town), so hot we think 90 really isn't that bad. We have become like the Eskimos who have something like 22 names for snow, similarly we have many names for degrees of hotness, such as: superhot (90-95), double sun hot (95-100), based on the double ringed sun graphic in the Sac Bee indicating a really hot day), surface of the sun hot (>100) and for the very worst days: center of the sun hot (>105).
We have an indoor/outdoor thermometer mounted in the kitchen, but sometimes I need a little independent verification of just how darn hot it really is out there, so I have devised this technique to test the actual outdoor temperature: