"With a temperature of 20.9C recorded in Gogerddan near Aberystwyth on Wednesday, it has become the warmest day of the year so far in the United Kingdom. England has also seen its warmest day of the year so far with 20.2C at Northolt, London. Temperatures widely have reached the high teens across England and Wales, making it more generally the warmest spell of weather of the spring so far."
"The temperatures in west and north-west of Wales have had temperatures boosted by something called the Foehn effect. This effect is caused by air travelling over a mountain range - in this case Eyri and Bannau Brycheiniog- formerly known as Snowdonia and the Brecon Beacons. Moisture in the air on the windward side of a mountain is forced to rise where it will cool and condenses, taking the moisture out of it."
"It is easy to get caught out in the spring months because, although temperatures aren't as high as later in the summer, ultraviolet (UV) levels in late March are actually just as strong as they are in September."
The United Kingdom recorded its warmest day of the year on Wednesday, with temperatures reaching 20.9°C in Gogerddan near Aberystwyth and 20.2°C in London. Temperatures across England and Wales reached the high teens, creating the warmest spring weather spell so far. The Foehn effect, caused by air traveling over mountain ranges like Snowdonia and the Brecon Beacons, significantly boosted temperatures in west and north-west Wales. As the spring equinox approaches, day length increases and the Sun moves higher in the sky. Clear skies are forecast with minimal rainfall expected over the coming week. UV levels are rising to medium across much of England, Wales, and eastern Scotland, presenting a particular hazard during spring months when UV strength matches September levels despite cooler temperatures.
Read at www.bbc.com
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