Sweet potato as one of the most important tuber crops of tropical and sub-tropical countries, was chosen as a model to study the effect of climate change in the form of high temperatures on crop production. Two sweet potato cultivars (Menofia and Mabrouka) were planted in two different dates [23 April (the current recommended planting date) and 29 July (scenario planting date for climate change)] and harvested after 155 and 169 days.  Planting in April caused a significant higher number of storage roots per plant, higher total and unmarketable yield, and greater physical characters of storage roots than those obtained from July planting date. Climate change, by shifting planting date to hot month, adversely affected growth, physical characters of storage roots and yield characters as compared to the recommended planting date.  Menofia “showed significantly higher values of yield characters, higher carotenoids and dry matter as compared to "Mabroka", while "Mabrouka" significantly surpassed "Menofia ' in the most vegetative growth characters. Harvesting potato 169 days after planting led to significant vigorous vegetative growth, greater yield accompanied with a significant increase in storage roots characters as compared with those harvested after 155 days.