Grafton Underwood Rainfall ForecastUnited KingdomEMNorthamptonshireGrafton UnderwoodToday 26 Mar5%Fri 27 Mar90%Sat 28 Mar30%Sun 29 Mar50%Mon 30 Mar15%Tue 31 Mar10%Wed 1 Apr15%Grafton Underwood rainfall forecast issued today at 6:36 am. Next forecast at approx. 8:36 pm.1-Day3-Day5-Day Graph Plots Open in Graphs Rainfall Probability Forecast Met Office Rain Today Real-Time Chenies (Hertfordshire) RadarNational SatelliteNational SynopticGet WillyWeather+ to remove ads