Grantham Rainfall ForecastUnited KingdomEMLincolnshireGranthamToday 29 Mar5%Sun 30 Mar10%Mon 31 Mar5%Tue 1 AprNo RainWed 2 AprNo RainThu 3 Apr5%Grantham rainfall forecast issued today at 12:37 am. Next forecast at approx. 2:37 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