Harefield Rainfall ForecastUnited KingdomSEGreater LondonHarefieldToday 12 May65%Wed 13 May70%Thu 14 May40%Fri 15 May10%Sat 16 May5%Sun 17 May15%Mon 18 May10%Harefield rainfall forecast issued today at 1:38 pm. Next forecast at approx. 3:38 am.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