空气的温度=气温 身体的温度=体温 外面的温度（or气温）很高。 我的体温高不高。

气 basically means the atmosphere here, so 气温 means the temperature of the atmosphere, or the weather. 温度 means temperature, so just the number you get. Body temperature is 体温。我的体温是多少（度）？What is my body temperature? 外面温度很高。The temperature outside is very high. 今天气温很高。The weather today is really hot (high temperature). Hope that helps!

气温 that means the temprature of weather. The meaning of 温度 is more extensive than 气温 You can say "今天的气温是多少度”或者“今天外面的温度是多少度” If you want to say the body temperature, you could say "我的体温是多少度”