Is temperate a climate?

Yes, temperate is a climate. The temperate climates of Earth occur in the middle latitudes (40° to 60° N/S of Equator), which span between the tropics and the polar regions of Earth. The Köppen climate classification defines a climate as “temperate” when the mean temperature is above −3 °C but below 18 °C in the coldest month.

Further Reading:

• Koeppen’s Climate Classification
• Geography Notes