Rhiwlas (Llandderfel) UV IndexUnited KingdomWLGwyneddRhiwlas (Llandderfel)1-Day3-Day Graph Plots Open in Graphs UV Forecast NOAARhiwlas (Llandderfel) UV forecast issued yesterday at 6:52 pm. Next forecast at approx. 6:52 pm.Get WillyWeather+ to remove ads