About 50 °C in a known desert - some time ago.
Let's see. How about 110 degrees at 3 AM in Somalia ? Close to 120 during the day.
115 in Saudi Arabia.
115 to 120 in Iraq.
But it's a dry heat ! LOL.
I experienced 122 degrees back on June 26,1990 in Phoenix AZ.
About 103 degrees F (39.4 C), which by chance is about the same as the highest fever I've ever had.
I think at my brother's wedding it got to around 110.