The humidity is very low in the desert making it feel much cooler.
Ideally 72 to 78 degrees. but the real determinant is what temperature you feel comfortable with.
We feel comfortable indoors between 18 degrees and 24 degrees Celsius.
80 degrees is a comfortable temperature. 80 degrees feels comfortable to most providing the humidity is at an average level. Most would agree that a temperature of 80 degrees provides pleasant weather.
I feel pretty comfortable if I'm not wearing gym shorts and a T-shirt.
A temperature of 20 degrees typically feels cool, especially if it's windy. You might feel comfortable with a light jacket or sweater. Make sure to consider factors like humidity and wind speed when gauging how it feels.
The feeling of 50 degrees C of temperature is quite unbearable for many people. This is a harsh weather condition and is mostly common in desert areas.
Somewhat comfortable.
Well, if you have 21 degrees air temperature, it's ok if the water you'll swim in is warmer, but if the water is cooler then it won't feel very comfortable. If you mean 21 degrees water temperature, it's ok to swim if the temperature of the air is warm (otherwise you'll feel cold when you come out). A heated pool's temperature is around 30 degrees, so 21 is not the same, but it's perfectly ok once you go in the water.
70 degress F is comfortable not to cold or to hot.
Freezing is 32 degrees and the boiling point is 212 degrees.
A temperature of 63 degrees Fahrenheit is typically considered mild or cool but not cold. It can feel comfortable to most people especially with layers.
38 degrees Celsius is relatively high for room temperature and may be uncomfortable for most people. It is above the normal comfort range of 20-25 degrees Celsius for indoor spaces. You may feel hot, sweaty, and likely uncomfortable at this temperature.