The ornamental design for a temperaturedisplaydevice, as shown and described.
FIG. 1 is a perspective view of a temperature display device showing the present invention;
FIG. 2 is a top plan view thereof;
FIG. 3 is a bottom plan view thereof;
FIG. 4 is a right elevational view thereof;
FIG. 5 is a left elevational view thereof;
FIG. 6 is a rear elevational view thereof; and,
FIG. 7 is a front elevational view thereof.
The broken lines in the figures show structure or boundaries that form no part of the claimed design, but rather show the environment in which the design is associated, or show portions of the article in which the design is embodied or applied that are not considered part of the claimed design.