We live in unusual times where the accelerating of climate change poses a danger to the future health, safety, and livelihoods of people world wide. The climate change phenomenon is characterized by temperature anomalies; temperature affects all the activities in our life such as agriculture, industry, tourism, human comfort, construction of buildings and choosing habitats. This book is produced to discus the approach of GIS in analysis of temperature data. At a time when talking about GIS technique we mean "toward a best world" by solving the problems and protecting our planet. The book shows the approach and methodology of GIS in monitoring the temperature trends. Since temperature has a spatial data, Geographical Information Science and System (GIS) can be a powerful tool for analyzing the temperature change problem and determining of the Affecting Factors. The book comprise many of topics such as temperature change concepts, History and Future, GIS concepts, approach and methodology in Exploration of Temperature Data, Geostatistical analysis, interpolation methods, spatial and temporal analysis of temperature trends all that will apply on Egypt country data as case study.