In Palermo, the capital of Sicily, the climate is Mediterranean with very mild and quite rainy winters, and hot and sunny summers.
The city is exposed to the Sirocco, the wind from Africa, which is able to raise the temperature by several degrees: it can exceed 20 °C (68 °F) in winter, and can reach or exceed 40 °C (104 °F) in summer. However, it is also exposed to the Mistral, the cool wind which blows from Sardinia. In summer, when good weather prevails, the sea breeze tempers the heat.
During the winter, it is rarely very cold, sometimes however, there can be cold, windy and rainy days, with highs around 10 °C (50 °F). Very rarely, in areas of the city farther from the coast there may be some snowfalls. The coldest records are around 0 °C (32 °F).
Here are the average temperatures.
Palermo - Average temperatures
Min (°C)9910111519222320171310
Max (°C)151516192327303128241916
Min (°F)484850525966727368635550
Max (°F)595961667381868882756661

Rainfall amounts to 615 millimetres (24 inches) per year, with a maximum in autumn and winter, and a minimum in summer, when it hardly ever rains.
Here is the average precipitation.
Palermo - Average precipitation

The amount of sunshine in Palermo is great in summer, when clear skies prevail; in winter, sunny periods alternate with periods of bad weather, with rain, wind and thunderstorms.
Palermo - Sunshine

Mondello Beach

The sea in Palermo is warm enough for swimming from July to September. In June, the sea is still a little cool, but in October, after the summer, the temperature is still decent, around 23 °C (73 °F): in days of fine weather, perhaps with the sirocco, locals go to the sea in the beach of Mondello. Here is the average sea temperature.
Palermo - Sea temperature
Temp (°C)151515151821242625232017
Temp (°F)595959596470757977736863

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