This is a known problem. It is also known to be exaggerated. The remedy is simple.

Let's say you are going to have 20% less generation on REALLY hot days over, say 35 degC. And 10% less generation at 30 degC and higher. Meh. Build 20% more generation capacity and forget about it. OR double your solar and get one more inverter and get a refrigeration unit for the inverters and you are done.

With EVs, the solution seems to be "make the battery bigger" and with coal generation plants, the solution is "let's make more, and not clean coal either, let's do it dirty." Solar is not a "finesse" thing. More is better. And it is cheap, and you already have the hardware, just bolt on some more panels and stop crying.  It just works. So build more. Way more. You need more? Build more. It is a no brainer.

And enjoy your greater capacity the rest of the year too.

I consider it to be a non-issue. Really. As a solar owner, it has never bothered me. I guess you want to factor it into your original plans, but people usually overbuild systems anyway.