The dew is one of the many forms of precipitation. It consists of water droplets appearing on an object’s surface in the morning and in the evening. It appears when the outer temperature of a solid object is lower than the ambient dew point. Water vapor then begins to precipitate creating small drops on the surface of a cool object. This effect often comes to pass during radiation cooling of the Earth’s surface on bright and windless nights. Radiation cooling is especially intensive in the case of metals, plant leaves, or glass. Highest amounts of dew emerge in humid air at high dew point. In the Czech Republic, even in such case, the total amount of precipitation does not exceed the level of 0.5mm. Source: Czech Wikipedia. OK. Quite a science.
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