Tomatoes are a warm-season crop grown year-round in Egypt. However, prices tend to spike during certain periods, particularly in the summer and autumn. In the Sohag governorate, farmers typically plant tomatoes from mid-August to the end of November to take advantage of higher prices in late autumn and early winter. However, tomatoes planted very early in August or very late in November experience heat and cold stress, respectively. This experiment was conducted to assess the impact of planting dates (September, October and November) on the performance of seven tomato hybrids. Our results showed that vegetative growth attributes such as leaf area, leaf area index, and plant fresh weight decreased under heat and cold stress, except for some genotypes. Plant length was affected by cold stress but not by heat stress. Plant survival decreased under both heat and cold stress. Conversely, dry matter content, TSS, vitamin C, total acidity, and fruit firmness increased as temperatures decreased. Fruit weight, fruit diameter, early fruit yield per plant, and total yield per feddan were negatively affected by the first and third planting dates, which were exposed to heat and cold stress, respectively. Both heat and cold stress adversely impacted all plant attributes, although heat stress in the first planting date was less severe than cold stress in the third planting date. The optimal planting date was found to be the second planting date in October, with the best varieties being 9090 and Super gold across the three planting dates