I am lucky to not be working or attending school right not.
I work on my projects early in the morning, around 6 am until I get too hot and late in the evening.
I am lucky that it is not humid where I live.
I also sew downstairs, which is 1/3 underground, but with big windows, so it is quite a bit cooler than upstairs.
I do have window air conditioners, but I do not like the feel of air that has gone through an air conditioner. So far this year I have not put them in the windows. I do have a window fan that blows over me at night and so far I am comfortable.
I find that having a swim in the late afternoon cools my core and I do not feel as hot as I did before my swim. I generally swim in the ocean, but sometimes the lake where the water is a bit warmer.