I don't think measured data from terrestrial weather stations can measure these differences in wavelength and if so such stations are rarely available and data accessible. The conventional stations rather provide a single UV value from a UV sensor and/or solar radiation sensor. A spectroradiometer of some sort would be needed on the station to measure UV wavelength range 100-400 nm that is divided into three bands: UVA (315-400 nm) UVB (280-315 nm) UVC (100-280 nm).