- The United Kingdom recorded its highest temperature of the year as mercury hit 20.1C in Wales.
- A meteorological event known as the Foehn effect has significantly boosted temperatures in specific coastal regions.
- Health officials advise caution as late March UV levels are now as strong as those in September.
The United Kingdom has officially experienced its hottest day of the year so far this Wednesday. A peak temperature of 20.1C was detected at Gogerddan, situated near Aberystwyth in Wales. This milestone marks the first time in 2026 that the British Isles have surpassed the 20C threshold during the spring season.
England also reached a new annual high, with Northolt in London hitting 19.9C. Broadly speaking, many areas across Wales and England enjoyed pleasant high teen temperatures, signaling a definitive shift in the weather. This mild spell represents the most significant period of warmth the country has seen since the end of winter.
Weather experts attribute the exceptional warmth in north-west and west Wales to the unique Foehn effect. This occurs when moist air is forced over high mountain ranges like Eyri. As the air descends the opposite side, it loses moisture and heats up rapidly. This process creates significantly warmer conditions for residents living on the leeward slopes.
While the sun brings welcome warmth, it also carries increased ultraviolet radiation risks. As the spring equinox approaches, the sun sits higher in the sky for longer durations. Clearer skies mean that regions across England and Scotland are seeing medium UV levels. These levels are comparable to the intensity typically found throughout the month of September.
Health authorities from the NHS remind the public to prioritize sun safety during this period. Although skin requires some sunlight to produce vitamin D, excessive exposure can be hazardous. Experts suggest seeking shade between 11:00 and 15:00. Wearing protective clothing and sunglasses is also recommended to prevent long-term damage to the eyes and skin.
The immediate forecast suggests that this dry and bright trend will persist. Very little rain is expected across the country for at least the next 7 days. Residents are encouraged to monitor local UV forecasts regularly. Balancing outdoor enjoyment with proper protection remains essential as the UK continues to experience this unseasonably warm spring weather.
