Why is it so hot these days?

(1) (If it doesn't rain) The wind belt of the pressure belt moves northward and is controlled by the subtropical high belt (about 30 north latitude). What a sunny day, the days are getting longer and longer, the sunshine time is prolonged, and the weather is sunny and dry.

(2) (If it rains or will rain) When the warm front crosses the border, it will be warm and wet.