Climate alt=Köppen–Geiger climate classification map at 1-km resolution for Inner Mongolia (China) for 1991–2020|thumb|370x370px Due to its elongated shape, Inner Mongolia has a four-season monsoon climate with regional variations. The winters in Inner Mongolia are very long, cold, and dry with frequent blizzards, though snowfall is so light that Inner Mongolia has no modern glaciers even on the highest Helan peaks. The spring is short, mild and arid, with large, dangerous sandstorms, whilst the summer is very warm to hot and relatively humid except in the west where it remains dry. Autumn is brief and sees a steady cooling, with temperatures below reached in October in the north and November in the south.thumb|Winter in Ulanbutan Grassland, Hexigten Banner|355x355pxOfficially, most of Inner Mongolia is classified as either a cold arid or steppe regime (Köppen BWk, BSk, respectively). The small portion besides these are classified as humid continental (Köppen Dwa/Dwb) in the northeast, or subarctic (Köppen Dwc) in the far north near Hulunbuir.Peel, M. C. and Finlayson, B. L. and McMahon, T. A. (2007). "Updated world map of the Köppen-Geiger climate classification" . Hydrology and Earth System Sciences 11: 1633–1644.
climate alt=köppen–geiger climate classification map at 1-km resolution for inner mongolia (china) for 1991–2020|thumb|370x370px due to its elongated shape inner mongolia has a four-season monsoon climate with regional variations the winters in inner mongolia are very long cold and dry with frequent blizzards though snowfall is so light that inner mongolia has no modern glaciers even on the highest helan peaks the spring is short mild and arid with large dangerous sandstorms whilst the summer is very warm to hot and relatively humid except in the west where it remains dry autumn is brief and sees a steady cooling with temperatures below reached in october in the north and november in the souththumb|winter in ulanbutan grassland hexigten banner|355x355pxofficially most of inner mongolia is classified as either a cold arid or steppe regime (köppen bwk bsk respectively) the small portion besides these are classified as humid continental (köppen dwa/dwb) in the northeast or subarctic (köppen dwc) in the far north near hulunbuirpeel m c and finlayson b l and mcmahon t a (2007) "updated world map of the köppen-geiger climate classification"  hydrology and earth system sciences 11 1633–1644