This book covers the Agro-climatic Classification of Pakistan on monthly, seasonal and annual basis. Furthermore, the crop water requirement and shifting of moisture regime from their average values have also been discussed. The results of this research can be used to access the future to crop water demands and plan irrigation schedule. This book provides an overview of the farming community to grow their crop according to potential of the area and helps the researcher, agronomist and other stakeholders to develop contingency plan for sustainable development towards agriculture.