@tve 63.4 C? Could be less!
You can generate a simple protocol by using
crontab -e and enter
@reboot echo “---------- start ----------” >> proto.txt
*/5 * * * * date >> proto.txt
1-56/5 * * * * vcgencmd measure_temp >> proto.txt
which will write a timestamp and a celsius amount every 5 minutes…and an eyecatcher at every boot. Look after a while into the file.