Frost mostly occurs in autumn and winter in below freezing conditions. It is normally observed as ice crystals on grass, leaves and wood. It forms when  humidity is high and dew freezes in air temperatures  below freezing point. Frost forms typically under cold and light windy conditions. Wind mixes the air above the surface with air on the surface. Therefore areas with little or no slope tend to receive more frost than adjacent higher slopes. Obstructions like trees, buildings, etc. reduce the severity of frost. In higher areas such as the Eastern Escarpment, where Vlakfontein is situated, frost is mostly more severe than in lower places, and sometimes it is so heavy that it resembles snow. These pictures were taken between 06h00 and 07h00 on Thursday, 2 July 2009.

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