I found this about dew point :
"The dew point temperature indicates the temperature at which the air must be cooled in order for it to reach a relative humidity of 100% and become saturated with water vapor. When a surface is cooled beyond that point, the water in the air condenses, forming beads of liquid water – or dew.
When the dewpoint and temperature are relatively close, you will likely be waking up to a lawn covered in dew the following morning."
So, what kind of rule would you make?
If current temp is within 5 degrees of the dew point, consider dew present?
Or if current temp is below the dew point, consider dew present?
Does the amount of cloudiness matter? I also understand that dew is more likely to be present if it's a clear sky than if it's cloudy.
