noun, noun-modifying (irregular)
monthly average; monthly mean
Used in statistics, weather, business, and similar contexts to refer to the average value over a month. Often appears as a prenominal modifier (e.g., 月平均気温).
今月の月平均気温は平年より高い。
This month's average temperature is higher than normal.
月平均の売上を計
Calculate the monthly average sales.