Here are a few examples of heat tolerant cucumbers:
- Summer Dance Hybrid. Japanese burpless variety with high resistance to Downy and Powdery mildew. ‘Summer Dance’ will delight you with sweet, melodious flavor. Glossy, deep-green 9” fruits are packed with sparkling refreshment. Japanese burpless variety grows like crazy, sending out numerous lateral vines for high yields. High resistance to Downy mildew and Powdery mildew; tolerant to heat stress. http://bit.ly/1BZ9UVP and https://jungseed.com/dp.asp?pID=02159
- Marketer Cucumber. This 1943 All-America selection is still a winner in today's gardens! A great slicer for salads and makes delicious pickle chips. Slender, dark green, 8 to 9 inch fruits have sweet, mild flavor. Vigorous, heat resistant plants are very productive with a long harvest season. White spined. Source: https://jungseed.com/dp.asp?pID=02132
- Pick A Bushel Hybrid Cucumber. Plant your own pickle factories. Be prepared to be pick lots of cukes from these compact plants. The medium green, white-spined fruits are sweet, firm and crisp, ready to pick only 50 days from sowing at 3 inch gherkin size for great pickles or left to grow to 6 inch length for slicing fresh in salads. The semi-bush vines grow only 24 inches long, so they are well-suited for growing in patio containers as well as the garden. Plants have excellent heat tolerance and disease resistances to CMV, Scab and MMV. Source: https://jungseed.com/dp.asp?pID=02039
- Eureka cucumber is not just tolerant but resistant to multiple diseases typically affecting cucumbers in the tropics.