Dewpoint is the atmospheric temperature below which water droplets begin to condense and become dew.
Relative humidity calculator wet bulb dry bulb.
Air humidity can be estimated by measuring.
In of mercury mm of mercury millibars hpa.
A simple online weather calculator to find the dewpoint and the wet bulb temperature by knowing the values of relative humidity temperature and actual station pressure.
Wet bulb temperature t wb can be measured with a standard thermometer with some wet clothing cotton or similar around the bulb.
By definition wet bulb temperature is the lowest temperature a portion of air can acquire by evaporative cooling only.
Note that continuously air flow around the thermometer is important to evaporate.
Enter a temperature wet bulb and actual station pressure.
If the air is fully saturated 100 relative humidity the water cannot evaporate so both the wet and dry bulb temperatures are the same.
This script will determine the relative humidity from the entered dry and wet bulb temperatures data.
If the dry and wet bulb temperatures are set to the same value the calculator will show the saturation mixing ratio the amount of water in saturated air at that temperature.
In of mercury mm of mercury millibars hpa.
Enter the two different temperatures.
Calculate dewpoint wet bulb temperature from relative humidity.
Enter dry bulb temperature plus either wet bulb temp rh or dewpoint temp.
It includes a dry bulb thermometer a wet bulb thermometer and a psychrometric chart a graph that plots the relationships between the dry and wet bulb temperature relative humidity and dew point at constant pressure.
Dry bulb temperature t db can be measured with a simple thermometer as shown above.
Enter your actual station pressure not the altimeter setting.
The wet bulb temperature wbt is the temperature read by a thermometer covered in water soaked cloth wet bulb thermometer over which air is passed.
When the psychrometer is swung around by its attached chain or handle the air causes the water on the wick to evaporate which.
Wet bulb temp c.
There is a converter below this calculator if you only know the celsius temperature for the entries required.
Relative humidity dewpoint temp c results.
Dry bulb temperature and.
Enter a temperature relative humidity and actual station pressure.
Relative humidity is measured using a device called a sling psychrometer this consists of 2 side by side conventional thermometers one of which the wet bulb thermometer has a wetted wick placed at the bottom the other the dry bulb thermometer has no wetted wick.
At 100 relative humidity the wet bulb temperature is equal to the air temperature dry bulb temperature.
Enter your actual station pressure not the altimeter setting.
