Mine was always better in the colder days, i dreaded the summer, anything over 25 degrees C my feet would start to burn more.
Stress was also a major contributor to mine as well, even cutting those tiles in different angles to fit small areas can be very frustrating as well, i know when i tiled this place, there were many floor tiles that cracked when cutting and got thrown down my back yard, when i done my block i was so glad to finish the job.

Brian