Steam version, not in developer mode, using live weather.
Brief description of the issue:
As you can see, the SAT (outside air temp) gauge shows a very unusual weather phenomenon. This would be commonplace, perhaps if I were flying on Venus, but last I checked, Florida is still on Earth.
These conditions were encountered on descent through FL240-ish some 75 NM or so north of KMIA.
I had also experienced a similar event before (though not fully understood at the time) while cruising @FL360 over Italy. At this other occasion, the issue disappeared once I flew out of the “hot spot”
At present time, it is unknown whether this will continue and for how long, as I have paused the sim to report this very bizarre happening.