humidity

Humidity is the amount of water vapor in the air.  The air has a high level of water vapor in it when it's humid.  Humidity levels are used to determine how much water vapor is in the air.


Source
Humidity shown on a car window
https://www.flickr.com/photos/billmorrow/45314256651/

temperature

Temperature is the degree of hotness or coldness.  Temperature has three measuring scales: Fahrenheit, Celcius, or Kelvin.  Temperature is used to measure the degree of heat in an object. 


Source
This thermometer shows the temperature
https://www.publicdomainpictures.net/en/view-image.php?image=241555&picture=thermometer-at-room-temperature