man the same test will the same valid somewhere in switzerland, cybd, czst, some austrian airport don’t sure what same as switzerland just dont remember. some places all year under live weather snow covered. rex fix it. but i don’t much like rex because of some time it set ugly flat overcast when you flight long enough and station changing. but locally rex is savior
at lukla rex get wehather from kathmandu(not really close, but any way without summer snow)
Strange weather phenomena occur around the Bella Coola airport with the vanilla default weather system too, I have choosen this airport to do some turbine testing after the Fenix update last weekend 
Very snowy outside for 19°C! (I don´t know how much medieval-Fahrenheit 19° Celsius are, but I start to sweat during such temperatures *ggg no snow can survive longer than an hour outside during this heat.)
Snow coverage in combination with temperature should get a closer look in the weather system. When daytime temperatures are over 10-12°C there should be no snow coverage in this area.