Semilong Rainfall ForecastUnited KingdomEMNorthamptonshireSemilongToday 21 Jul5%Wed 22 Jul5%Thu 23 Jul10%Fri 24 Jul5%Sat 25 Jul35%Sun 26 Jul15%Mon 27 Jul5%1-Day3-Day5-Day Graph Plots Open in Graphs Rainfall Probability Forecast Met Office Rain Today Real-Time Semilong rainfall forecast issued today at 2:56 pm. Next forecast at approx. . Rainfall Rainfall AccumulationChenies (Hertfordshire) RadarGet WillyWeather+ to remove ads