I'm trying to figure out if a certain city, with these characteristics, is possible, geographically:
Assume the city's the size of Renaissance London...
With Renaissance London technology
Doesn't precipitate (rain or snow) in the daytime, for about one and a half months.
Has farms outside the city and can farm wheat, oranges, apples, walnuts, and (sugar cane or sugar beets or some other source of sugar for pastry and other confectioneries).
The populace doesn't need any special clothing to prevent heatstroke. They wear the clothes of commoners of Renaissance England. (No desert people clothing...)
There's a river running through the middle of the city.
The rest of the surrounding area can be anything you want.