Bayanbulag (Mongolian: Баянбулаг, rich spring) is a sum (district) of Bayankhongor Province in southern Mongolia.

[1] Bayanbulag has a cold semi-arid climate (Köppen climate classification BSk) with mild summers and severely cold winters.

The climate is very dry; most precipitation falls in the summer as rain, with some snow in the adjacent months of May and September.

Winters are very dry.

This Mongolia location article is a stub.