Question

After raining when do rain drops dry away easily on a cloudy day or on a sunny day? explain

Answer 1

    I would tend to think that the amount of sunlight reaching the water is irrelevant.

The color of the surface that the water lies on is more important.  A black, matte

surface absorbs more infrared radiation than a light-colored, reflective surface.

Answer 2

On a sunny day the temperature might be above 40°C which will cause the water to vaporize quicker as if it were cloudy and colder