Ecco l’arrivo di Charon in September, the African anticyclone that arrives outside its usual season. The high pressure, of subtropical origin, will expand, following the path that Charon had traced in July, until it embraces Scandinavia.
Significant temperature deviations from the climatic averages for the period are expected, with peaks of up to +12°C in Swedish Lapland and +10°C in regions including Finland, the Baltic Republics, Germany, France and England.
In Italy, especially in the North, temperatures are expected to be about 7-8 degrees higher than the September average, thanks to the arrival of Charon. If in July we had more than 15 hours of sunshine a day, now, between the first and second ten days of September, the sun rises just before 7 in the morning and sets around 19:30 p.m., offering about 12 hours and 30 minutes of solar heating and 11 hours and 30 minutes of nighttime cooling.
All this affects the maximum temperatures, which will reach 35-36 degrees, in contrast to the peaks of July that reached 42-44 degrees. Despite the arrival of the African anticyclone, which has similarities with Charon in midsummer, we are approaching the autumn equinox on September 23, when the hours of darkness will exceed those of light. This will determine a gradual cooling at night, allowing for better rest compared to the torrid tropical nights of July and August.
Meanwhile, in the next few hours, the threat of Medicane (Mediterranean hurricane) on the Ionian will move away towards Libya. Its passage along the southern Italian coasts has brought rains at times intense, stronger winds and local storm surges, but it seems that the danger has been averted.
In these hours, the cyclone similar to a hurricane is gaining even more strength, but it is heading towards the South-East, making landfall near Benghazi in Libya, in the region of Cyrenaica. With its movement, we will have a strengthening of the high pressure also in the south.
Over the weekend and for at least a week after, we will be able to enjoy the return of sun and heat throughout Italy. The only small risk will be represented by sporadic infiltrations of fresh Atlantic air in the North, which could cause thunderstorms especially in the Alps and Prealps, especially between 12 and 13 September.
Article published on 9 September 2023 - 11:20
