The weather is hot and it hurts to urinate when you sit for a long time.

It’s normal, I’ve had it too. That's what summer is like.

The weather is hot in summer, and all the water produced in the body is sweated, resulting in less urine. Urea is mainly eliminated from the urine, so urination is reduced, the urea concentration is high, and there is a stinging feeling when urinating.

My experience above is purely original, please ask if necessary.