High humidity will keep air temperatures low. If you want to compare cities in different biomes, it would be better to look at heat index values. I’m showing Ahvaz at 10% relative humidity right now, so the air temperature will be close to the heat index. In Houston, the air temperature can be 100, but with 50-60% humidity factored in, the heat index could top 122.
Playing with the demo, it lacks adding text/captions and reordering photos compared to Google Photos. Any other suggestions?