There is just one region in September in Italy experiencing the dry season and this is Sardinia. 16 of 17 regions have the tourist season in September in Italy. These regions are Sardinia, Liguria, Sicily, Calabria, Apulia, Campania, Lazio, Abruzzo, Marche, Emilia Romagna, Veneto, Tuscany, Umbria, Piemonte, Lombardy, West Alps.

The lowest day temperature in Italy in September can be found in East Alps, where the value of day temperature is 17.6 °C (63.7 °F). The day temperature in September in Italy is the highest in Sicily - its value is 27.4 °C (81.4 °F).

In Italy in September - the region with the lowest night temperature is East Alps. The value in this region is 7.1 °C (44.8 °F). The highest night temperature in September in Italy can be found in Sicily, where the value of night temperature is 20.0 °C (68.0 °F).

The sea temperature in Italy in September is the lowest in Veneto - its value is 22.4 °C (72.2 °F). The highest sea temperature in Italy in September can be found in Calabria, where the value of sea temperature is 24.5 °C (76.2 °F).

The lowest number of rainy days in Italy in September can be found in Sardinia, where the value of number of rainy days is 5 days. The number of rainy days in September in Italy is the highest in East Alps - its value is 11 days.

In Italy in September - the region with the lowest rainfall amount is Sardinia. The value in this region is 37 mm (1.46 in). In Italy in September - the region with the highest rainfall amount is West Alps. The value in this region is 115 mm (4.53 in).

The wind speed in Italy in September is the lowest in Piemonte - its value is 0.9. The wind speed in Italy in September is the highest in Sardinia - its value is 4.2.

The lowest value of the humidity in September in Italy can be seen in Calabria with a value of 69 %. The highest humidity in Italy in September can be found in West Alps, where the value of humidity is 76 %.

The lowest value of the number of sun hours (without clouds) in September in Italy can be seen in Piemonte with a value of 6 hours. The number of sun hours (without clouds) in Italy in September is the highest in Sicily - its value is 8 hours.

The clear sky percentage in September in Italy is the lowest in Piemonte - its value is 44 %. In Italy in September - the region with the highest clear sky percentage is Sicily. The value in this region is 67 %.

The day length in September in Italy is the lowest in Sicily - its value is 12 hours. The day length in September in Italy is the highest in East Alps - its value is 12 hours.