Superfluous, unnecessary, not wanted.
What is Rain?
The condensed aqueous vapors raised in the atmosphere by the sun and wind, converted into clouds, which fall in rain, snow, hail, or mist: their falling is occasioned by their own weight in a collision produced by contrary currents of wind, from the clouds passing into a colder part of the air, or by electricity. If the vapors are more copious, and rise a little higher, they form a mist or fog, which is visible to the eye; higher still they produce rain. Hence we may account for the changes of the weather: why a cold summer is always a wet one—a warm, a dry one.
Aqueous, watery; consisting of water.
Collision, a striking together, a clash, a meeting.
Electricity, a natural agent existing in all bodies (see [page 18]).
What seasons are more liable to rain than others?
The Spring and Autumn are generally the most rainy seasons, the vapors rise more plentifully in Spring; and in the Autumn, as the sun recedes from us and the cold increases, the vapors, which lingered above us during the summer heats, fall more easily.
Recede, to fall back, to retreat.
What is Snow?