Wipe the glass part of the thermometer to remove any debris that may hinder your view.
Position yourself eye level to the barometer. Locate the highest point of the liquid inside of the glass tube. Look for the hash mark on either side of the glass tube that matches the level of the line.
Read the information next to the hash mark.
Hold your finger over the large hand.
Draw an invisible line with your finger past the tip of the hand.
Read the description on the barometer that correlates with where your finger rests.