Glan-yr-afon (Llandderfel) UV IndexUnited KingdomWLGwyneddGlan-yr-afon (Llandderfel)1-Day3-Day Graph Plots Open in Graphs UV Forecast NOAAGlan-yr-afon (Llandderfel) UV forecast issued yesterday at 7:52 pm. Next forecast at approx. 7:52 pm.Get WillyWeather+ to remove ads