The metric system
Celsius vs Fahrenheit
In Francophone countries, Celsius is used to measure temperature rather than Fahrenheit. The freezing point in Celsius is 0°C and the melting point is 100°C. In Celsius a comfortable temperature is about 25°C which is about 77°F.
Season temperatures in Celsius
In the summer the temperature is usually 70-80°F. In Celsius that would be 20-30°C. In the winter the temperature is around 0°C. In the spring it is around 15°C. In Autumn the temperature is about 10-15°C.