I'm the worst person to answer such questions. I don't pay enough attention and forget things quickly. 😇 But I would say, yes that's too hot too early. I don't think it was that hot on that day we met last year, was it?
This heat is going to last for at least one week. 35C every day, with nights between 19 and 21C. I think other places in Germany are several degrees hotter though.