The sun sends out different types of radiation – visible light that we see as sunlight, infrared radiation felt as heat and UV radiation that we can't see or feel.
People often confuse infrared and UV radiation. When the temperature is cool it means less infrared radiation but not necessarily less UV radiation.
There are three types of UV radiation, categorised by wavelength: UVA, UVB and UVC.
Levels of ultraviolet (UV) radiation from the sun change throughout the day, every day, each month, each season, each year, across Australia.
The total amount of UV radiation present at a given location is affected by: