Siberian High
Seymchan has a severe subarctic climate "Dfc", closely bordering the "Dfd" subtype with very dry winters due to the influence of the persistent Siberian High in the months of low sun. Winters are extremely cold, although not as cold as "Dfd" climates such as Oymyakon, Delyankir, Verkhoyansk etc. Summers are short and mild, but sometimes very warm. Precipitation is quite low, but is somewhat higher in summer than at other times of the year.