In general, under the A1B emission scenario, the projected monthly rainfall shows smaller variations than that of the historical mean value for all six selected climate change models (Figure 9). However, each model projection has acted differently in different months. Especially during the months of October and November, almost all of the models have projected higher monthly rainfall values. For example, the HADCM3 model has projected average monthly rainfall of 428.3 mm for November, where the average historical rainfall for November is 337.8 mm, almost a 100-mm difference. Rainfall changes of this magnitude can have a significant impact on RWH systems.