common sense for muggy

[panicmonger]

When the weather is muggy, it is unpleasantly warm and the air contains a lot of water.

Could you please tell me how come the weather can still be warm when the air contains a lot of water?

Thanks a lot.

[lauralie2]

It's similar to how the room feels after you have taken a very hot bath or shower.

[SoothingDave]

The amount of water in the air (humidity) affects the way it feels. In Northern areas, where heating of houses in the winter is important, many homes feature humidifiers. This adds water to the air, allowing the heating system to be more effective.

Air conditioning does the opposite, removing water so it feels cooler.