Why temperature is called a scalar quantity having a direction?
Step.1 Scalar quantity
A scalar quantity is a physical quantity which has a magnitude but no direction. For example: mass, length, time etc.
Step 2 Vector quantity
A vector quantity is a physical quantity which has both magnitude and direction. For example: Displacement, velocity, acceleration, momentum, electric field etc.
Step 3 Justification that temperature is scalar quantity having a direction