Late-September Heat Forecast for UK and Australia
Late-September Heat Forecast for UK and Australia
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Key Points
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The UK warm spell is expected to begin with a warm weekend: London could reach 23C on Saturday and 21C on Sunday, while Cardiff may reach 23C, Manchester 22C, Belfast 19C and Glasgow 18C on Tuesday.
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The Met Office forecast includes unsettled conditions before the heat, with showers particularly affecting Scotland, south-west England and Wales on Saturday; higher pressure is then expected to build from the south on Monday and Tuesday.
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Australia’s heat is being driven by north-westerly air from Western Australia’s “heat engine,” after Antarctic air had recently pushed south-east temperatures as much as 10C below average, produced snow near sea level in Tasmania and brought Goulburn down to -7C.
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Several Australian capitals are forecast to record their warmest September temperatures in years: Canberra’s 25C would be its warmest September day in three years, Melbourne’s 27C its warmest in three years and Hobart’s 27C its warmest in seven years.
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Meteorologist Dean Narramore described the rapid swings as a “spring rollercoaster,” noting that Hobart could fall from 27C on Sunday to just 14C on Monday as hot northerly winds give way to colder southerlies.
The UK faces a late-September warm spell with temperatures soaring to 25°C in southern England early next week, before a sharp reversal brings rain and frost Your Weather. Meanwhile, south-eastern Australia is bracing for unusually hot spring weather with highs near 28°C in Sydney and a dramatic swing as cold air rushes in days later Your Weather.
UK Heat Peaks Tuesday With 25°C in the South
England's warmth begins this weekend with London hitting 23°C on Saturday and 21°C on Sunday Your Weather. By Tuesday, highs will reach around 25°C in London, East Sussex, and southern England Your Weather. The Midlands could briefly match or exceed Athens at 24°C Your Weather. This four-day warm spell arrives after high pressure builds from the south on Monday and Tuesday Your Weather.
Other major cities will see temperatures climb. Cardiff may reach 23°C, Manchester 22°C, Belfast 19°C, and Glasgow 18°C on Tuesday Your Weather. Before the warmth, showers will affect Scotland, south-west England, and Wales on Saturday Your Weather.
Australia's Spring Heat Driven by Western 'Heat Engine'
South-eastern Australia will see temperatures 6°C to 15°C above average this week. Sydney could reach 28°C, while Melbourne and Hobart both hit 27°C Your Weather. Inland areas will climb into the low-to-mid 30s Your Weather. This hot air is being pulled from Western Australia's heat engine after Antarctic air had recently chilled the region Your Weather.
Several capitals are on track for their warmest September days in years. Canberra's 25°C would be its warmest in three years, Melbourne's 27°C its warmest in three years, and Hobart's 27°C its warmest in seven years Your Weather. The contrast is stark—just days ago, Antarctic air brought snow near sea level in Tasmania and dropped Goulburn to -7°C Your Weather.
Sharp Temperature Reversals Expected in Both Regions
The UK's warm spell will not last. Rain and cooler, potentially frosty conditions arrive later in the week Your Weather. The temperature swings reflect the dramatic seasonal shifts typical of spring Your Weather.
Australia faces an even more dramatic turnaround. A polar air mass will bring a 10°C to 15°C drop across parts of the country Your Weather. Hobart exemplifies the volatility—forecast to hit 27°C on Sunday but fall to just 14°C on Monday as hot northerly winds give way to cold southerlies Your Weather. Meteorologist Dean Narramore called the rapid swings a "spring rollercoaster."
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