The meteorologist says that it is hot outside. the weather characteristic being described is a. air pressure b. humidity c. precipitation d. temperature lease awnser now

The correct answer is - D. temperature.

When a meteorologist says that it is hot or cold, than he/she is describing the temperature. Even though it is not a precise information, people can approximately understand what the meteorologist means when he/she puts the information in a descriptive manner.

The perception of hot and cold varies a lot from place to place, so it is subjective to a certain place, because the people living around the Equator will consider the weather to be hot if the temperatures are going 40 or 45 C degrees, while the people living around the Arctic circle will consider a temperature of around 20 to 25 degrees to be hot.  

i'm sure the answer you are looking for would be

a. an ice age

hope this contact me if this didn't or you need with more answers : )