Tynlon (Tref Alaw) UV IndexUnited KingdomWLIsle of AngleseyTynlon (Tref Alaw)1-Day3-Day Graph Plots Open in Graphs UV Forecast NOAATynlon (Tref Alaw) UV forecast issued today at 7:52 pm. Next forecast at approx. 7:52 pm.Get WillyWeather+ to remove ads