平へい年ねん値ち

noun

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.

• 今年ことしの夏なつの気き温おんは平へい年ねん値ちを大おおきく上うわ回まわった。

  This summer's temperature greatly exceeded the climate normal.

• 平へい年ねん値ちと比くらべて降こう水すい量りょうが少すくない。

  Precipitation is low compared to the climate normal.