Residents in Welwyn Garden City are preparing for a period of very warm weather, with temperatures set to rise steadily throughout the upcoming Bank Holiday weekend. According to the Met Office, local temperatures will climb from 27°C on Friday 22 May to a peak of 32°C by Monday 25 May 2026.
The UK Health Security Agency has issued a yellow heat health alert for the East of England, which includes Hertfordshire. This alert came into effect at 09:00 on Friday 22 May and will remain active until 17:00 on Wednesday 27 May. During this time, residents are advised that UV levels will be high, meaning it is important to seek shade during the middle of the day, cover up with appropriate clothing, and apply sunscreen.
While the warm, settled conditions are expected to be suitable for outdoor plans over the Bank Holiday, hay fever sufferers should take note of changing pollen counts. The Met Office forecast indicates that pollen levels in the area will rise from low on Friday and Saturday to moderate on Sunday and Monday, eventually reaching high levels by Tuesday 26 May.
Met Office Deputy Chief Forecaster Steve Kocher noted that this warming trend is driven by high pressure, which causes sinking air to compress and warm. As temperatures rise across the country, it is likely that national records for May could be broken if the mercury exceeds 32.8°C.
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