Fog Clouds.
When light fog clouds on evenings are observed to rise from the valleys and hang around the summits of mountains, rain follows.
February Fog.
A fog in February indicates a frost in the following May.
Fog Frost.
He that would have a bad day must go out in the fog after a frost.
Frost.
During frosty weather, the dissolution of mist, and the appearance of small detached cerro-cumulus clouds in the elevated regions of the atmosphere are said to foretell that the termination of frost is at hand.
Fog and Rain.
When the fog goes up the hill the rain comes down the mill.