Grass Holm Rainfall ForecastUnited KingdomOSOrkney IslandsGrass HolmToday 21 Dec70%Mon 22 Dec90%Tue 23 Dec15%Wed 24 Dec10%Thu 25 Dec10%Fri 26 Dec10%Sat 27 Dec10%Grass Holm rainfall forecast issued today at 12:36 pm. Next forecast at approx. 2:36 am.1-Day3-Day5-Day Graph Plots Open in Graphs Rainfall Probability Forecast Met Office Rain Today Real-Time Hill of Dudwick (Aberdeenshire) RadarNational SatelliteNational SynopticGet WillyWeather+ to remove ads