Grainsby Rainfall ForecastUnited KingdomEMLincolnshireGrainsbyToday 16 Jul15%Thu 17 Jul10%Fri 18 Jul35%Sat 19 Jul45%Sun 20 Jul45%Mon 21 Jul45%Tue 22 Jul35%Grainsby rainfall forecast issued today at 1:36 pm. Next forecast at approx. 3:36 am.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