Meaning
A fair-weather friend — someone who stays close while times are good and 'the weather is dry', but vanishes the moment trouble or the rains come. The image is drawn straight from the land: the friend who is there in the easy dry season but nowhere to be found when the storm hits. It is a pointed way of warning that not everyone who smiles with you in good times will stand by you in hard ones.
Examples
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Him a dry-weather friend, gone when tings get hard.
He's a fair-weather friend, gone when things get hard.
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Watch out fi dry-weather friend.
Watch out for fair-weather friends.
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When trouble come, di dry-weather friend disappear.
When trouble comes, the fair-weather friend disappears.
Origin
From 'dry weather' (good times) + 'friend'; a fair-weather friend. See [[bad-mind]], [[nine-day-wonder]].
How it’s used
A fair-weather friend, close in good times but gone in trouble. See [[bad-mind]], [[grudgeful]].