What do the numbers below the fifteen-day weather week represent?

The next line is the weather of the day.

The figure below shows the estimated maximum temperature of the day, in degrees Celsius.

The red line below is the daily maximum temperature change.

The blue line is the daily minimum temperature change.

The lowest figure is the estimated lowest temperature of the day, and the unit is degrees Celsius.

What do the numbers in the weather forecast mean?

This figure is also a day, and what we often understand is the degree of celsius.

Your software shows Fahrenheit-days.