In a dense residential community, when 70% of the units are running ACs and a minority are not, it's going to get substantially hotter than 1C for the ones that are not. It will be upward of 5C hotter in the non-AC units in my experience when the wind is minimal. The 1C you came up with does not apply in the close proximity of the dense urban air conditioning.

Reflective clothing using PDRC materials will be a lot more feasible than personal air conditioning. The latter would require a powered spacesuit anyway which makes it awkward to work. See https://youtu.be/NVAcSgLZues although it's not about clothing, but the idea is the same.