In the past I grew gooseberries, and we often reach 100F in the summer.
They never seemed to suffer from the heat. They did get some late afternoon
shade. I had good crops for a few years; what finally caused me to yank
them was the gooseberry saw fly, which I grew tired of battling.
Black currants do very well for me, both the Crandall, which is lovely and
smells like cloves in bloom, and the Consort. I had Jostaberries for 10
years, and they grew vigorously, but never bore much fruit.
Good luck and have fun,
Zone 6, South-central PA
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