The weather is muggy and the air pressure is high or low?

Sultry heat means low air pressure.

Low pressure refers to the air pressure near the ground. Low pressure airflow rises upward. The more the airflow rises, the more the temperature drops, so rainfall is easy to form.

Therefore, people feel that the weather is gloomy and hot in summer, mainly due to the influence of low air pressure. Low pressure generally brings strong winds and rainfall to the areas it passes through. Generally, air pressure is closely related to weather.