What can I grow in this weather conditions?

[uttam]

I was considering hydroponic lettuce but a buddy informed me that I cannot because the lettuce needs cool climatic conditions.
Temperatures: average: 24 C / 72 F
Height: 700 mts / 2296 ft above sea level.
Soil: clay
Location: North America
It's stormy in winter season but I'm building garden greenhouses to control rain fall, ground and insects.