No, dew is the result of condensation. Condensation occurs after water has evaporated and became water vapor in the air, which condenses on cool surfaces in the form of dew.
when there is a little bit of water in the air.
Dew won't form if there is no atmospheric moisture present (humidity of 0%), or if temperature is above the dew point for a given relatively humidity.
when it is day time, the water gets heated up by the sun rays. when this happens, it starts evaporating and as result, it forms clouds. as evaporation continues all the day forming clouds, the clouds...