Plenty of cold places in civilisation with no radar and non precision approaches. You better have the back of an envelope handy before top of descent. Fagernes (Norway)being a prime example. Cold wx corrections as per the Jepps table worked out spot on. Flew it once in VMC and got a good view. Next time to minimums(300 agl or thereabouts in blowing snow)and not applying corrections would have been suicide.
Caution best exercised in kasakhstan and other Eastern countries. Double whammy cross checking metric altitude tables AND seeing if they make sense as having been temp corrected for vectoring, especially if QNH requested and they normally use QFE.