noun
temperature difference; temperature range
Refers to the difference in temperature between two points in time or space, such as between day and night, indoors and outdoors, or between seasons.
今日は気温差が激しいので、体調に気をつけてください。
The temperature difference is large today, so please take care of your health.
この地域は一日の気温差が大きい。
This region has a large daily temperature range.