Weather This Week: 26C Peak Set to Break the April Pattern Before a Sharp Cooldown
weather this week is shaping up to feel more like late spring than early April, but the warmth will not last. Parts of the UK could climb to 26C on Wednesday, after Tuesday delivered the year’s highest temperature so far at 24. 8C in Mona, Anglesey. The short-lived surge is being driven by warm air moving in from continental Europe, with sunny skies and very high pollen levels adding to the seasonal contrast. By Thursday, however, conditions are expected to change quickly, with cooler air moving in.
Why the brief warmth matters now
The significance of weather this week is not just the headline temperature. It is the speed of the swing. On Tuesday, all four nations recorded their warmest readings of the year so far, a clear sign that unusually mild air has spread widely across the UK. England reached 22. 5C in Somerset, Scotland also reached 22. 5C in Moray, and Northern Ireland hit 19. 0C in County Armagh. For an early-April period, those numbers sit well above average and show how widespread the warmth has become.
Wednesday is expected to be the peak of the spell for many areas, with the Midlands, East Anglia and south-east England most likely to see the highest temperatures. Some localised spots could reach 26C, around 10C above the early-April average. That makes weather this week notable not only for its warmth, but for how unusual it feels for the time of year.
What is driving weather this week
The current pattern is being shaped by warm air drawn in from continental Europe, with the foehn effect helping lift temperatures further in north-west Wales. That warming wind on the leeside of a mountain explains why sheltered locations have seen the highest readings. On Wednesday, most of England and Wales should remain dry and sunny, with a gentle south to south-easterly breeze, though some cloud will drift into parts of northern England and Wales later in the day.
Not every part of the UK will share the same experience. Northern Ireland and north-west Scotland are expected to be cloudier and cooler, with outbreaks of rain at times. The contrast underlines how uneven weather this week may be, even while the overall picture remains very warm for many.
Expert view on the short-lived temperature surge
Met Office Chief Forecaster Paul Gundersen said the UK is seeing “a brief but notable spell of very warm weather for early April, with temperatures more typically associated with late spring or early summer. ” He added that it could be “the warmest spell at this point in April since 2020, ” but stressed that the warmth will be short-lived, with a marked drop in temperatures and more unsettled conditions later in the week. In some areas, daytime temperatures could fall by around 10C between Wednesday and Thursday.
That kind of drop matters because it changes the public-facing impact of weather this week quickly: outdoor plans, travel, and even the perceived season shift from one day to the next.
Broader impact: pollen, UV, and the return of cooler air
The warm spell is also carrying secondary effects. Pollen levels are forecast to be very high for much of England and Wales over the next few days, while Scotland and Northern Ireland are expected to see high levels before they ease later in the week. UV levels are also rising, and the forecast warns that even in early spring, strong sunshine can already be enough to cause skin damage during prolonged exposure.
Thursday marks the turning point in weather this week. East Anglia and the southeast may still hold onto some warmth, but cooler air will begin moving in from the northwest, with showers becoming more widespread and conditions turning more unsettled. For now, the sharp contrast between a near-summer midweek peak and a fast cooldown is the central story. The question is not whether the warmth arrives, but how quickly the country notices it leaving.
