The oldest year available with daily minimum and maximum temperatures in wunderground.com was 1942. The mean temperature is also available from the website, but I didn’t include it because a human being doesn’t experience an average temperature. We feel the heat or cold minute by minute, not in 24 hour averages.
The temperature for 1942 is subtracted from the 2016 temperature. A positive number indicates that it was warmer in 1942 than in 2016. A negative number, obviously, means that it was warmer in 2016 than 1942.
At the bottom of the table are the summed differences for all 12 months. As you can see, the summed difference of the minimum temperature between 1942 and 2016 on the first day of every month was only eight degrees. It was slightly warmer (or less cold) during the winter months in 1942. The summed difference of the maximum temperature between 1942 and 2016 was larger — 56 degrees. Surprisingly, on the first day of each month for 1942 and 2016, the maximum temperature for 1942 was higher than the maximum temperature for 2016.
Again, this is not a commentary on climate change which deals in averages, this is just how a Tucsonan would experience the weather at two points during the first day of each month in 1942 and 2016.
I also analyzed the minimum and maximum temperatures of 1945 and 2016. I’ll post that soon.