Traditional Culture Encyclopedia - Weather inquiry - 18 degrees is it cold with bare arms?

18 degrees is it cold with bare arms?

If it is summer, the weather at 18 degree is not cold, because the summer temperature is high and the air humidity is relatively low, but if it is spring and autumn, the temperature is a little cold, and if it is winter, it will be worse and you will catch a cold, so you should add clothes reasonably according to the season to protect your health.