Residents in Welwyn Garden City can expect a week of mild spring weather between 12 April and 19 April 2026, though the return to typical seasonal temperatures brings a high risk for hay fever sufferers.
According to the Met Office, temperatures in the town will rise steadily throughout the week. The forecast shows 13°C on Monday, increasing to 18°C by Friday before cooling slightly to 16°C by Sunday.
The week will feature a mix of sunny intervals and light afternoon showers. There is a higher likelihood of rain early in the week and towards the weekend, with a 40 per cent chance of showers expected on Monday afternoon and again on Saturday afternoon. Across the wider East of England region, forecasters have also noted a potential risk of hail and thunder from Monday through Friday.
While the weather is becoming more settled, high pollen levels are expected to persist throughout the week. The levels are driven by a combination of high birch pollen and moderate ash pollen. Experts note that recent warm spring conditions have accelerated the release of pollen across the country, causing hay fever symptoms to arrive earlier this year.
For those managing symptoms, Allergy UK recommends keeping an eye on local forecasts and taking appropriate preventive steps. These milder conditions follow an unseasonably warm spell in early April, which saw temperatures reach 26.6°C in parts of the UK, the hottest start to April in 80 years.
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