Humidity

This high humidity makes me feel tired.

It is not so much the heat as the humidity that makes me tired.

I can't stand humidity.

What with the heat and the humidity, I didn't sleep well.

What with the heat and the humidity, he couldn't sleep well.

It's difficult to breathe when humidity is high.

The humidity is 80%?! It must be really humid!

The humidity is 80%?! It must be really close!

In the summer the humidity is high.

You can use a psychrometer to measure relative humidity.

The high humidity made the air feel sticky and hot.

Plants in the greenhouse thrive in constant humidity.