We should keep our furniture out of the sun as the temperature of the summer sun coming through a window can go above 140 degrees. Sun’s powerful ultraviolet (UV) radiations will cause your furniture to fade. Dried heat to wood will cause to shrink and it will leave cracks to the wood. If we use humidifier in the drier months to bring the moisture up to the 40 to 45 percent level then sun will cook fine finishes, fading and destroying them over time, and dried out and shrink the wood, which will leave cracks on the wood. Never place wood furniture near heating units or vents.
The effective strategy to keep light out is add curtains or window treatments to your windows.
But the there is one condition in that the entire window must be covered in order for your furniture to be protected.