The temperate zone is not defined by a specific number of degrees. It's defined by its climate rather than a fixed latitude range.

Here's why:

* Climate Zones: The Earth is divided into climate zones based on latitude and temperature. The temperate zone falls between the tropical zone and the polar zone.

* Latitude Variation: The exact latitude range of the temperate zone varies depending on the source and how they define it.

* Climate Factors: Temperate zones are characterized by having four distinct seasons, moderate rainfall, and a wider temperature range compared to tropical zones.

Therefore, it's more accurate to say the temperate zone spans a range of latitudes rather than a fixed degree width.