Temperature plays a key role in determining the climate of the region. Surface of the land is heated up quickly than the water bodies because a land surface doesn’t allow penetration of heat deeply so the temperature of the land surface rises quickly. The effect of temperature is reduced by the sea breeze, land breeze and wind flows over various water bodies. In this study we tried to calculate the continentality by using Conrad’s Coefficient of Continentality index for the period 1901 to 2000 and the attempted to compare the Continentality with agricultural production in the five districts of central Tamil Nadu region of Thanjavur, Thiruvarur, Nagapattinam, Pudukkottai and Trichy districts. This study will conclude that there is negative correlation between the Temperature and paddy yield. The analysis of the data during the period 1901-2000 indicated that low coefficient of continentality in the decade 1951-1960 and high coefficient of continentality in the decade 1981-1990.
