(Rare.) The categorizing of one year’s weather at a given locality according to one of the climatic classifications.

Thus, if the weather of a given year at a certain station was unusually mild and rainy, falling within (for example) Köppen’s definition of a tropical climate, that station is said to have had a “”tropical year,”” whatever its normal classification.

Köppen, W. P., and R. Geiger 1930–1939. Handbuch der Klimatologie. Berlin: Gebruder Borntraeger, 6 vols.

Source: American Meteorological Society

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