What's the weather like in Taiyuan in May?

At the beginning of May, the weather was unstable and sometimes cold, but it was stable at the end of May, and it was hot at noon. But because Taiyuan is a city on the Loess Plateau, the temperature difference is large, that is, long sleeves must be worn in the morning at the end of May, and thin sweaters and short sleeves are enough for the elderly and infirm!