Grantham Rainfall ForecastUnited KingdomEMLincolnshireGranthamToday 27 Oct75%Tue 28 Oct80%Wed 29 Oct40%Thu 30 Oct85%Fri 31 Oct45%Sat 1 Nov50%Sun 2 Nov50%Grantham rainfall forecast issued today at 6:35 am. Next forecast at approx. 8:35 pm.1-Day3-Day5-Day Graph Plots Open in Graphs Rainfall Probability Forecast Met Office Rain Today Real-Time Ingham (Lincolnshire) RadarNational SatelliteNational SynopticGet WillyWeather+ to remove ads