Here is a document which may help you get a basic understanding of adjusting alignment and pressure to control tire temperatures.
Tire temperatures change rapidly as you go through different sections of the track; therefore there is a very limited window to get a meaningful measurement of tire temperatures. You should be doing multiple, consistent HOT laps (measure using lap times), and then immediately go into the hot pit to take measurements. If you cooled down for even half a lap, the temperature data would not be very useful.
On a properly driven 1M/M3 with stock suspension, you should be seeing much higher temperatures on the outer edge of each tire. Your temperatures are very even across the width of each tire which makes me wonder if you waited too long to get your measurements.