The Met Office has forecast heavy rain and strong winds for Welwyn Garden City, Hertfordshire, starting on Friday, February 20, 2026. After a dry start to the morning, a band of heavy and blustery rain is expected to move across the area from midday through the late afternoon. There is a 95 per cent chance of rain at 12pm and 4pm, with conditions remaining changeable and windy through Tuesday, February 24, 2026.
Daytime temperatures are expected to stay mild, ranging between 11 and 13 degrees Celsius, but the weather will feel rough due to south-westerly wind gusts reaching up to 34 miles per hour. Residents are advised to secure loose garden furniture and take extra care when walking near trees. Previous surveys by the local council have shown that about one-third of trees in some town car parks have internal decay, which makes branches more likely to fall during windy weather.
The heavy rainfall may lead to surface water flooding at well-known local spots, including the underpass by the Howard Centre and Great Northern Road. The Environment Agency monitors the River Mimram through Welwyn Garden City and Digswell, which is a designated flood warning area where water levels can rise quickly during intense storms. Drivers should allow more time for their journeys and expect potential road closures in low-lying areas.
People planning to travel by train should also check for updates, as Great Northern rail services between London Kings Cross and Stevenage often face disruptions during bad weather. High winds and heavy rain can cause issues with overhead power lines and track equipment, leading to delays or cancelled services throughout the weekend. Outdoor plans may need to be adjusted as the unsettled weather is predicted to last for several days.
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