Number + 摄氏度
The measure word 摄氏度 (shèshìdù) is the unit for temperature in Celsius. It is placed after a number to express temperature readings. For example, 亿摄氏度以上 means "over a hundred million degrees Celsius."
今天气温只有三摄氏度,记得多穿点。
Jīntiān qìwēn zhǐyǒu sān shèshìdù, jìde duō chuān diǎn.
The temperature today is only three degrees Celsius; remember to dress warmly.
水在零摄氏度以下会结冰。
Shuǐ zài líng shèshìdù yǐxià huì jiébīng.
Water freezes below zero degrees Celsius.
夏天最高温度可以达到四十摄氏度。
Xiàtiān zuìgāo wēndù kěyǐ dádào sìshí shèshìdù.
In summer the highest temperature can reach forty degrees Celsius.