Seasonally

Seasonally is an English adverb used to describe actions, patterns, or phenomena that occur in a regular, recurrent manner tied to the seasons of the year. It characterizes events that tend to happen at particular times within the annual cycle, such as weather changes, crop harvests, holidays, or tourism flows. The term helps distinguish these regular seasonal effects from non-seasonal or irregular variations.

In statistics and economics, seasonality refers to predictable patterns that repeat annually. Seasonally adjusted figures remove this predictable variation to reveal underlying trends, while seasonally unadjusted data retain the seasonal effects. Analysts may use seasonal indices, moving averages, or decomposition methods to identify and quantify seasonal patterns. Common examples include higher retail sales before holidays and increased heating demand in winter.

Etymology and usage: The word is formed from season and the adverbial suffix -ly, from Latin seasonalis meaning of the season. In everyday language, seasonally can modify verbs, adjectives, or nouns, as in seasonally produced crops or seasonally affected demand. The term is widely used across meteorology, agriculture, economics, retail, and tourism.