
The expansion of the Azores Anticyclone will guarantee atmospheric stability over much of Italy from Monday 21st to Wednesday 23rd, with clear skies and temperatures above average in the North and Centre, while the South and Sicily will remain affected by residual instability and scattered rain, awaiting a cooler change in circulation from Wednesday.
AI-generated summary
The Azores Anticyclone is an area of semi-permanent high pressure of oceanic origin which, when it extends eastwards, hinders the arrival of Atlantic disturbances, favoring stable and sunny weather conditions.
The new week will see the expansion of the Azores Anticyclone to guarantee greater atmospheric stability over much of Italy. The South and Sicily will be an exception, still affected by a residual depression circulation responsible for the latest rains.
Mattia Gussoni, meteorologist at iLMeteo.it, confirms the expansion of the Azores Anticyclone over Western Europe and part of the Mediterranean basin. This is a vast semi-permanent area of high pressure of oceanic origin which, when extending eastward, hinders the arrival of Atlantic disturbances, bringing sunny weather and weak winds.
This structure will guarantee strong atmospheric stability at the start of the week over a large part of the country, with a prevalence of clear skies and temperatures still above the climatic averages of around 4-5 degrees. In cities such as Turin, Milan and Bologna, maximum values of around 28-29°C are expected, which will reach 30°C in Florence and Rome. Calabria and Sicily, on the contrary, will still feel the effects of the receding depressionary circulation.
This configuration will maintain residual instability, with the possibility of new rainfall both during Monday 21st and Tuesday 22nd.
A general change in circulation is expected on Wednesday 23rd, coinciding with the Autumn Equinox and with the arrival of cooler currents coming from Northern Europe.
This air flow will lead to a general drop in temperatures, realigning values to the seasonal average. Subsequently, the subsidence of the high pressure will allow the entry of a new unstable front, which will initially affect the regions of the North-East and then extend towards the Centre-South, bringing new rainfall and a general strengthening of the winds.
IN DETAIL
Monday 21. In the North: sunny. In the Center: prevailing sun. In the South and on the Islands: rains in Calabria and Sicily.
Tuesday 22. In the North: sunny. At the Center: serene. In the South and on the Islands: widespread instability across Sicily and Calabria.
Wednesday 23. In the North: sunny, temperatures dropping. In the Center: prevalence of stable weather. In the South and on the Islands: latest rains in Sicily.
AI outlook — possibilities, not facts
A general change in circulation is expected on Wednesday 23rd, coinciding with the Autumn Equinox and with the arrival of cooler currents coming from Northern Europe.
Very likely · Within days
Subsequently, the subsidence of the high pressure will allow the entry of a new unstable front, which will initially affect the regions of the North-East and then extend towards the Centre-South, bringing new rainfall and a general strengthening of the winds.
Likely · Within days

Two Atlantic perturbed fronts will cross Italy between Monday 9 and Friday 13 November, bringing widespread rain, snow in the Alps and Scirocco and Libeccio winds. Accumulations of up to 150 mm/24h expected in Liguria on Thursday 12th, with possible storm.

A temporary stable phase affects the Centre-North with light rain in the South, but from Monday 9 November the return of Atlantic disturbances will bring widespread rain, snow in the Alps and winds of up to 90 km/h, with the peak of instability on Thursday 12 November in the Centre-North.

A disturbed Atlantic front passes over Italy on Saturday 7 November with rain, snowfall on the mountains and winds of up to 50 km/h. Since Sunday 8th, high pressure has brought stability and calm to much of the territory, with night fogs in the North and in the central valleys.

According to iLMeteo.it, the beginning of autumn in Italy will be characterized by stable and sunny weather thanks to the Azores anticyclone, with temperatures above average. However, an increase in rainfall is expected in the coming months, especially in the Mediterranean, due to high sea surface temperatures which favor the formation of storm cells and potential supercells.
A wave of bad weather has hit several Italian regions with an orange alert in Liguria and part of Emilia-Romagna, and a yellow alert in Lombardy, Veneto, Umbria and other areas. There have been floods, landslides, disruption to roads and railway traffic, as well as a school evacuation in Versilia due to lightning. In Florence, over 45 millimeters of rain fell in an hour, causing infiltration of the Uffizi without damaging the works.

Heavy rains and tornadoes hit Central-Northern Italy, causing two victims: an 83-year-old woman who drowned in an underpass in Latisana and an elderly woman who bled to death in Sinalunga due to broken glass. Flooding, river overflows, damage to buildings and interruptions to railway and road traffic have been reported in Tuscany, Lazio, Lombardy, Friuli Venezia Giulia and other areas. Over 63,000 lightning strikes recorded in Tuscany.