Can we use precipitation and pressure to predict rain?

Read the following descriptions of air measurements used to forecast the weather. Notice that all measurements have to be considered in order to make an accurate prediction. You can't consider just temperature, or relative humidity, or wind direction alone when trying to make a forecast. read more

Not exactly as fog may occur without rain. Here is the closest prediction I know of: Both French and English fishermen from the English Channel, used to have a wet and dry bulb thermometer on the side of the wheelhouse, in the past. read more

It only has to be 100% relative humidity where the clouds and rain form—not near the surface. If air rises and cools, clouds form, and relative humidity increases. If precipitation falls from the clouds, it often falls into layers with lower humidity. The rain will evaporate which may increase humidity, but not enough to allow precipitation. read more

Temperature can affect the type of precipitation that forms. If atmospheric conditions are such that precipitation can occur and the temperature is above freezing, then rain may form. If the temperature is below freezing, then snow may form. read more