Siberian High
In this area, temperature inversions consistently form in winter due to the extremely cold and dense air of the Siberian High pooling in deep hollows, so that temperatures increase rather than decrease with higher altitude. In Verkhoyansk it sometimes happens that the average minimum temperatures for January, February, and December are below . Oymyakon and Verkhoyansk are the only two permanently populated places in the world that have recorded temperatures below every day of January.