Lancaster County-Mc Whirter Field UV IndexUnited StatesSCLancaster CountyLancaster County-Mc Whirter Field1-Day3-Day Graph Plots Open in Graphs UV Forecast NOAALancaster County-Mc Whirter Field UV forecast issued yesterday at 2:18 pm. Next forecast at approx. 2:18 pm.Get WillyWeather+ to remove ads