I can't believe I've never ran into this problem before...
The Endure Elements spell says
"A creature protected by endure elements suffers no harm from being in a hot or cold environment. It can exist comfortably in conditions between -50 and 140 degrees Fahrenheit (-45 and 60 degrees Celsius) without having to make Fortitude saves. The creature’s equipment is likewise protected.
Endure elements doesn’t provide any protection from fire or cold damage, nor does it protect against other environmental hazards such as smoke, lack of air, and so forth."
So, someone can exist comfortably in -20 degree temps without making a Fort save, but at that temperature, you take 1d6 of lethal damage each round WITH NO FORT SAVE. So, how can it allow a character to "exist comfortably" with no fort save if there's no fort save to bypass because the damage is automatic?
As per the environmental dangers rules the non-lethal or lethal damage suffered within the temperature ranges covered by endure elements is in fact un-typed damage. Resist energy and similar effects will not reduce this damage. The line of text stating that you gain no protection from fire or cold damage is to prevent players claiming endure elements protects them from fire or cold typed effects. The spell states “ A creature protected by endure elements suffers no harm from being in a hot or cold environment” this pretty clearly says that the spell protects you from the lethal and non-lethal damage you would normally suffer within the temperature ranges covered by the spell.
I guess I never noticed that they made it non-typed damage. It's a little hard to believe that you can be effectively immune to severe freezing cold in an attack (with high resist energy), but take damage after being in 28 degree temperature after an hour. Even if you use the "slow blade kills" argument for the cold (Dune reference, I'm sure you get), it still seems weird.
Thanks for pointing it out.
You are quite welcome :)