Yes! All glass in and around a door opening has to be tempered glass, according to all building codes. In fact, it is even more important that transom glass is tempered, simply because of the height of the transom from the ground.
Tempered glass, remember, is type of safety glass. It’s been processed to increase its strength compared with normal glass. When broken, tempered glass crumbles into small, granular chunks instead of splintering into jagged shards like normal glass does. These granular chunks are less likely to cause injury.
So if the glass in your transom, above your entry door, ever broke—for whatever reason—large, jagged shards of glass will not be raining down on you or your family. All patio doors are tempered glass as well. It’s a safer solution.