Suomi Virtual Museum Try this interactive applet to explore the relationships between temperature, dew point temperature and relative humidity.
Instructions are below.
The background picture depicts a winter scene. The blue thermometers represent the outside air temperature and dew point temperature. You control the out side temperature and dew point with your mouse. To change the temperature point to the red bar of the thermometer, hold down the left mouse button, and pull the fluid up or drag it down. You change the dew point temperature the same way using the thermometer that represents dew point.