Warping behavior of the rigid pavement is a well-known phenomenon and its root cause is daily variation in temperature at different regions of the concrete slab. Indian Road Congress (IRC) has recommended temperature differentials state wise, but due to variation in air temperature in different regions within the state the temperature differentials are likely to vary in different locations within the regions. This may have a major impact on the design thickness of pavements. In a bid to study Built-In Temperature Differential (BITD) a pavement quality concrete block of 20 cm, 25 cm and 30 cm thickness is constructed in the Udaipur region and compared with the IRC:58-2015 specifications. Block experienced a wide variation in the temperature distribution across the depth as rainfall water falling on the top surface is controlling the surface temperature. Temperature differential reported in the area under the study is substantially lesser than the value recommended in the IRC-58:2015 irrespective of block thickness hence, temperature differential needs to be given due consideration in the local region.