garuan.

1840 Penny Cycl. XVIII. 3/1 From June to November, the sky is covered with a kind of fog, which is called the garua.

1847 T. Ross tr. J. J. von Tschudi Trav. Peru ix. 248 In the oases the garuas are much heavier than in the adjacent wastes.

1877 E. G. Squier Peru 38 We are assured that ‘it never rains in Lima’; but the dense permeating mist not infrequently forms itself into minute drops, when it is called guara[sic].

1914 C. R. Enock Ecuador 195 The Peruvian coast..receives..a light mist-drizzle, known as garua.

1927 W. G. Kendrew Climates of Continents (ed. 2) 313 At Lima..heavy showers are rare, the usual rain being a fine drizzle or a wet mist called Garua.