Cooma has an oceanic climate ("Cfb"); however, it is warmer than would be expected for its altitude and latitude due to being on the leeward (eastern) side of the ranges; this is evident when compared to Batlow on the windward (western) side of the ranges, which averages 3 °C cooler in winter maxima. Summers are warm with cool nights, and winters are chilly with freezing nighttime lows. The area is relatively dry (by south-east coastal Australia standards), as it falls in a rain shadow. Despite its dryness, it only has 90.1 clear days annually, lower than the adjacent coastal areas of Wollongong and Sydney (106 and 107 clear days, respectively).