hoarfrosts

With the rarity of dew, that of hoarfrost which is nothing but frozen dew, may be associated; nor does hoarfrost often occur, because in Khorassan it rains in the winter too freely, particularly in all such places whose elevation is not sufficient to cause the formation of snow, and hence where other circumstances are favourable for hoarfrosts, _they are too much watered_ as it were, and seldom occur.

Journals of Travels in Assam, Burma, Bhootan, Afghanistan and the Neighbouring Countries William Griffith

Worried, thwarted, frozen to death by the hoarfrosts of Paris, he took the road back to Rome in November, 1642, on the pretext of going to fetch his wife, and did not return any more.

A Popular History of France from the Earliest Times, Volume 5 1830