From the earlier part of the week before the festival started and definitely before the sun came out. Our experience was that walking anywhere more than a couple of blocks marked you out as either a tourist or poor. Or like us, poor tourists.
This happened to me a couple of years ago too when I went to Barcelona and it felt more like Bangor. We seem to have brought the sunshine back with us from Texas, but not the temperature, I think it’s still up in the seventies there.