Saying 60C is not a real world thing is not true, many lift motor rooms here will regularly reach that and higher in summer, as they typically are brick and concrete slab buildings on top with a lovely reflective silver concentrator of the rest of the building cooking the walls all day. Sitting with almost zero cooling aside from air vents typically closed with rodent proofing and roach proofing mesh, and with 10kW of motor heat being dissipated in the room with it as well, and all the brake, controller and shaft heat rising up into there as well. If you are unlucky you get the older ones that are basically a tin shack, walls, roof and with a tin sheet door, basically a solar oven. You go in there and it might be 60C easily, and you work fast and take regular breaks out in the up to 40C cool outside. Your meter should work there though, you will be leaving it there while you go out for the break and the look for some water to drink.
You tend to get the hotter non room temp conditions a lot more than the cold ones, though you can also be working in a cold store with it sitting at -30C as well, though you probably are really only going to be concerned with rough resistance and continuity, and if voltage is present in about the right range in these conditions.
I understand your point. I'm from Croatia, it's 37°C in my home town now. Products I make are usually installed in metal boxes in full sun, and everything I make is specified to work to at least 65°C...
But....
Of top of my head, Fluke 87V (–20°C to + 55°C specified), Fluke 27/28 II (-15°C to +55 °C , -40 °C for up to 20 minutes) , Keysight U1273AX (-40°C to 55°C ),
Brymen 839 (-10°C to +50 °C), Brymen 235 (-10°C to +50 °C).......
I presume if you look further, there will be some other. Those are specified and guaranteed to work at those temp extremes..
I wouldn't trust any meters operated outside their operating specs for serious (professional) work, no matter how well they fare in Joe's testing.
Especially if I worked on elevator motors and such installations, that are CAT III best case, and some are even CAT IV as far as overvoltage goes..
It's not that anything is wrong with his measurements, but product is not guaranteed to work out of specs. On specific one that Joe tests, all might even work fine and be safe, but you might go out and buy same instrument from different batch/revision... That will be assured and tested by manufacturers according their specs...But might have different behaviour outside, at the extremes....
My main handheld meters now are Brymen 869S and 525S.. But I have my trusty old Fluke 77 III (0°C-50°C) in my carry on toolbox for when I go where it's hot...
What I'm trying to say that meters should not be tested outside specs, and then expect that because someone measured it, it is now characterised and safe to use outside manufacturer's warranty. It's not, and only manufacturer can respecify instrument for extended temperature range or whatever..
Most of the meters out there are specified for 0-40°C... For work where it's enough.
If your work requires extended operating range, you're out of luck, you're gonna have to go buy extended specification meters from known brands and pay for it...
Thinking about it, this is one of occasions, where it is much better to buy, for instance, used Fluke 87V in good shape than brand new Brymen 869..
Or maybe for motor work on line voltage, one of electrical testers like FLUKE T150 ..
Regards..