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In my last visit I was lucky enough with our weather. I could walk and enjoy with an atmosphere.
Usually, it's 100F and I only could buy something shortly and run

I totally understand, I experienced that 100+ degree hot spell too. Do they sell 'ice cold' beer at your market, if they did they probably sold out. Seriously, I do enjoy shopping at these farmer's markets. Have a nice day (stay cool).

they only sell coffee/tea and lemonade

Iced coffee will work. Thankfully the days are cooling off.