The perception of temperature can vary depending on personal preferences and local climate conditions. However, as a general guideline, a temperature range of 15-18 degrees Celsius (59-64 degrees Fahrenheit) can be considered cool to mild.
Some individuals may find this temperature range to be chilly or cool, especially if they are accustomed to warmer climates or if there is wind or high humidity present. Others might perceive it as normal or even warm, particularly if they are used to colder environments or engage in physical activities that generate body heat.
It's important to note that factors like personal clothing choices, humidity levels, and wind speed can influence how one perceives the temperature. Additionally, cultural and regional differences can also impact individual interpretations of what is considered warm or cool.