With nocturnal elevated convection, there is a stable layer at the surface with an unstable layer above. What can happen in these situations is that the thunder can be "ducted" and can be heard at longer distances.
We got the tie at 95, but the little pop-ups halted the rise. Went down to 88 but back to 94 now. It isn't at the top, but I wouldn't be surprised if this was a top-10 hottest September day by average temperature.