Both the St. Louis Missouri and Preston England Temples have domes in their celestial rooms. The temples share the same floor plan, so this isn't too surprising. Other temples with this style likely have domes. I know that Boston has a small dome at the end of the room. If I recall correctly it has clouds painted in a fake oculus.
|St. Louis Missouri Temple Celestial Room|
|Preston England Temple Celestial Room|
The first style of small temple had a few mentionable domes. The Brisbane Australia Temple has a dome with cloud and sky scene and the Snowflake Arizona Temple has an elliptical dome with a sunburst pattern. These temples are often criticized for being cookie-cutter. The domes help add some garnish to the very nice cookies.
|Brisbane Australia Temple Celestial Room Dome|
|Snowflake Arizona Temple Celestial Room Dome|
|Apia Samoa Temple Celestial Room Dome|
|Newport Beach California Temple Celestial Room Dome|
|Redlands California Temple Celestial Room Dome|
|Sacramento California Temple Celestial Room Dome|
|San Antonio Texas Temple Celestial Room Dome|
|Draper Utah Temple Celestial Room Dome|
|Sao Paulo Brazil Temple Celestial Room Dome|
The Jordan River Utah Temple has an oval dome. It is really simple with just some texture added like you sometimes see on vaulted ceilings in homes. The Provo Utah and Ogden Utah Temple both have domes in their celestial rooms. At least one of them is a dome with numerous ribs and a nice pattern.
The Orlando Florida Temple has a glass dome in its celestial room that can be seen here.
The Rexburg Idaho Temple has an elliptical dome with a wheat pattern painted on it.
I'm sure other temples have domes. Please comment and let us know about other interesting Mormon Temple celestial room domes, or what you think about these.