The latest forecast paints a familiar picture for early June, with a notably unsettled start to the week before a gradual shift towards something warmer and more settled later on.
However, as is often the case at this time of year, there is considerable uncertainty in how the details will unfold, particularly when it comes to temperatures heading into the weekend.
Showery conditions dominate the early week
The current weather pattern is characterised by widespread showers affecting much of the UK. These are being driven by low pressure lingering nearby, helping to produce frequent, and at times intense, downpours.
Radar imagery shows a broad spread of showers across the country, with reports of thunder, lightning and even hail embedded within them. This is a classic convective setup for early summer, where sunshine can quickly trigger heavy showers, leading to rapidly changing conditions.
This pattern is expected to continue through Tuesday and Wednesday, with little change in the overall setup. Showers will remain hit-and-miss in nature, meaning some areas may see prolonged dry spells and sunshine, while others experience sudden heavy downpours within a short space of time.
Rainfall totals are unlikely to be excessive overall, as many of the showers will move through relatively quickly on a brisk airflow. However, where showers linger, particularly across northern areas, rainfall can build up over a few hours, with locally heavy bursts possible. Alongside the rain, there is also the potential for gusty winds, hail and lightning, adding to the unsettled feel of the early part of the week.
Midweek brings further rain before a transition
As we move into the middle of the week, there are signs of a more organised spell of rain arriving, associated with a warm front pushing in later Wednesday into Thursday.
Although this rain is not expected to be particularly heavy or prolonged everywhere, it will bring a spell of wet conditions for many before clearing eastwards. Behind it, conditions begin to change as we head towards the latter part of the week.
Friday is likely to act as something of a transition day, with remnants of rain clearing and a gradual improvement from the southwest as pressure begins to rise.
High pressure building for the weekend
Looking ahead, there is increasing confidence that high pressure will build across the UK as we move into the weekend. This should bring a noticeable improvement in conditions, with more settled, drier weather expected for many areas.
Compared to the unsettled and thundery conditions earlier in the week, the weekend is likely to feel much calmer, with longer spells of dry weather and increasing amounts of sunshine.
There may still be some cloud and the chance of light rain in northern areas, but overall, the signal is for a more settled spell developing and potentially lasting into the start of next week.
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A key uncertainty: how warm will it get?
While there is good confidence in the shift towards more settled weather, there is much less certainty about how warm it will become.
A key feature of the weekend forecast is the boundary between cooler air from the north and warmer air pushing up from the south. Exactly where this boundary sets up will have a major impact on temperatures across the UK.
Recent model runs have shown significant variation in how far north this warmer air will extend. Earlier forecasts suggested the potential for widespread high temperatures, possibly reaching the high twenties or even low thirties Celsius in some areas.
However, more recent model guidance has shifted towards a cooler scenario, with temperatures still warm in sunshine, but generally closer to the low to mid-twenties for many areas.
This change highlights the uncertainty in the forecast, and the sensitivity of the outcome to relatively small changes in the position of pressure systems.
Understanding the model spread
Forecast confidence is further complicated by a wide range of possible outcomes shown in model ensembles. These simulations explore different plausible scenarios, and currently show a large spread in potential temperatures for the weekend.
Some scenarios favour a warmer outcome, with temperatures reaching the high twenties where sunshine is prolonged. Others suggest a fresher feel, with temperatures struggling to rise much beyond the high teens or low twenties.
This spread is unusually large for this timeframe, underlining how uncertain the forecast remains and why it is difficult to pin down exact temperature values at this stage.
READ MORE: Warmer weather is on the way, but will there be a heatwave?
Regional differences likely
Even if warmer air does push into the UK, it is unlikely to affect all areas equally. Southern regions have the greatest chance of seeing above-average temperatures, as it is best placed to benefit from warmer air moving up from the south.
Further north and east, confidence is lower, with a greater chance that cooler air could persist for longer, limiting any significant temperature rise.
This north–south and east–west contrast is likely to be a defining feature of the weekend weather, with some areas feeling distinctly summery while others remain more subdued.
What happens next?
Looking beyond the weekend, there is a reasonable chance that settled conditions will persist into the start of next week, with Monday possibly becoming warmer than Sunday in some locations.
However, there are early indications that low pressure could begin to reassert itself as we move into the middle of next week, bringing another shift back towards more unsettled conditions.
As always at this range, confidence decreases further out, and details will continue to evolve over the coming days.
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