If the first frost occurs late, the following winter will be mild, but weather variable. If first frost occurs early, it indicates a severe winter.
Gray Sky.
If there be a dark, gray sky, with a south wind, expect frost.
Heavy Frosts.
Heavy frosts are generally followed by fine, clear weather.
Hoar Frost.
If there be an abundance of hoar frost, expect rain.
Ice.
If the ice crack much, expect frost to continue.
June Frosts.