climate normal; climatological normal
Meteorological term for the 30-year average of a climatic element such as temperature or precipitation. Used in weather reports and climate statistics.
This summer's temperature greatly exceeded the climate normal.
Precipitation is low compared to the climate normal.
Compound of 平年 (average year) and 値 (value). The term is a direct translation of the English 'climate normal' and is used in meteorological contexts.