Typical albedos for visible light of various surfaces
SurfaceAlbedo (%)
Fresh snow75-95
Ice30-40
Water (sun low in sky)25
Water (daily average)10
Water (sun high in sky)5
Thick clouds60-90
Thin clouds30-50
Sand15-45
Grasslands10-30
Dry, dirty ground5-20
Forests3-10
Venus78
Earth (with atmosphere)30
Mars17
Moon7