Due to increasing concentration of carbon dioxide and other greenhouse gases in the atmosphere, several hydro-meteorological variables are likely to be significantly impacted. Reservoir operations, crop production, erosion processes, runoff production and many other hydrological processes are likely to be impacted by the ongoing climate change. This paper presents a comprehensive review of climate change impact on hydro-meteorological variables in several river basins around the world. The hydrometeorological variables considered in this study include maximum temperature, minimum temperature, precipitation, and streamflow. A review of local weather generators to model hydrological impact of climate change has also been presented. Changes in the frequency of hydro-climatic extremes may be one of the most significant consequences of climate change. Therefore, a review of impacts of climate change on hydrological extremes has also been presented.