Relative Humidity

Master relative humidity calculations with our easy-to-use chart and practice problems!

Calculating Relative Humidity Use the Relative Humidity Chart to calculate the relative humidity. 1. Subtract the wet bulb from the dry bulb temperature. See where the dry bulb temperature and the difference between the dry and wet bulb temperature intersect. What is the relative humidity if the dry bulb temperature is 10 degrees C and the wet bulb temperature is 8 degrees C? 100 88 76 65 What is the relative humidity if the dry bulb temperature is 22 degrees Celsius and and wet bulb temperature is 18 degrees Celsius? 83 75 68 60 What is the relative humidity if the dry bulb temperature is 20 degrees Celsius and the wet bulb temperature is 10 degrees Celsius? 30 23 17 11 What is the relative humidity if the dry bulb temperature is 28 degrees Celsius and the wet bulb temperature is 28 degrees Celsius? 100 93 86 78 Which can hold more water vapor? warm air cold air temperature does not matter. If the dew point and the temperature are close it is very cold it is very hot it is very humid it is not humid When the relative humidity is 100% the dew point is higher than the air temperature lower than the air temperature the same as the air temperature starting to rise