A set of 24 solar terms Cold Dew mobile phone wallpaper pictures are shared with everyone. Cold Dew is the seventeenth solar term of the year. It is when the sun is at 195° of ecliptic longitude and the Big Dipper points to A at night.At this time of year, the temperature is even lower, and the dew on the branches and leaves of plants increases day by day in the morning and evening. The dew is cold and has the tendency to condense, so it is called cold dew.