I’ve received a lot of good information on this forum, so I thought I put this out there if it might help someone.
I think my environment might be pretty extreme. Southern Arizona and its been a brutal summer. Daily highs constantly above 110F. Little if any rain for some occasional daily cooling.
Raspberry Pi 3B+. Not in direct sun, but pretty close. Enclosure is facing north about 18 inches off the ground. NO cooling fans, NO vents in enclosure. Powered by POE adaptor, not POE HAT. Heat sinks placed on Pi.
Pi is only for ADS-B, 1090 only. Running PiAware, TAR1090. Feeding FA and FR24. FA SD image, replaced librtlsdr to keep CPU utilization down.
Attached are some photos and temp graphs from 14 and 30 days. I know it may be an issue long term on the Pi, but Fall is just around the corner and then daytime highs will only be around 105F.