I do outdoors stuff even when it’s -20C but find it difficult to get anything done at 25C, never mind 37C.

In that case, you should change the scale to match how hot/cold it actually gets outside. In many parts of the world, and even in North America, it regularly goes below 0F or above 100F.

“How hot it feels” is highly subjective. I would absolutely melt at 100F but feel fine at 0F, and nothing feels colder than those rainy windy days when it’s 5C outside.