the geographic distribution of the monthly or annual average values of climatic variables - temperature, precipitation, relative humidity, percentage of possible sunshine, isolation, cloud cover, wind speed and direction, and atmospheric pressure over regions
The radiation fog is formed when the land surface cools after the sunset in the conditions of the clear sky. Thus the cooling ground cools the air above it and as a result of this the conduction causes the air temperature to fall and hence it reaches the dew point and forms a fog.
