Welwyn Rainfall ForecastUnited KingdomEEHertfordshireWelwynToday 4 Oct20%Mon 5 Oct15%Tue 6 Oct70%Wed 7 Oct70%Thu 8 Oct50%Fri 9 Oct55%1-Day3-Day5-Day Graph Plots Open in Graphs Rainfall Probability Forecast Met Office Rain Today Real-Time Welwyn rainfall forecast issued yesterday at 7:10 pm. Next forecast at approx. 9:10 am. Rainfall Rainfall AccumulationChenies (Hertfordshire) RadarGet WillyWeather+ to remove ads