15 degrees Celsius is a temperature that is considered mild and comfortable for many people. Here's some context:

* Weather: It's a pleasant temperature for being outdoors, especially in spring or autumn.

* Indoor Comfort: It's often considered the ideal room temperature for most people.

* Human Body Temperature: It's a bit below normal human body temperature (around 37°C).

Let me know if you'd like to know how it compares to other temperature scales or if you have any other questions!