Rome
Italy
Long-term weather forecast
Long-term weather forecast
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September weather forecast and Climate
Rome, Italy

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The sun rising beautifully above the Colosseum in Rome Italy
The sun rising beautifully above the Colosseum in Rome Italy
September brings the mild autumn season to Rome as the average temperatures drop to the comfortable range of 15°C (59°F) to 26.7°C (80.1°F). It is one of the best months to visit Rome and attracts crowds to the city as the summer heat tapers down.
Rome faces seasonal floods in low-lying parts of the city during early autumn as the rainfall registers around 73.7mm (2.9"). October sees many sunny days but also has cloudy skies for long periods. The average humidity is around 75% and the nights are occasionally muggy in the presence of a thick cloud cover.
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  • The average high temperature in September: 26.5°C

The warmest month (with the highest average high temperature) is August (30.6°C).
The month with the lowest average high temperature is January (11.9°C).

  • The average low temperature in September: 15.2°C

The month with the highest average low temperature is August (18.3°C).
The coldest month (with the lowest average low temperature) is January (3.1°C).

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  • The average rainfall in September: 73.3mm

The wettest month (with the highest rainfall) is November (115.4mm).
The driest month (with the lowest rainfall) is July (19.2mm).

  • The average rainfall days in September: 6.2 days

The month with the highest number of rainy days is November (9.7 days).
The month with the lowest number of rainy days is July (2.1 days).

  • The average daylight in September: 12h

Months with the longest days are May, June and July (Average daylight: 15h).
The month with shortest days is December (Average daylight: 9h).

  • The average sunshine in September: 7.9h

The month with most sunshine is July (Average sunshine: 10.7h).
The month with least sunshine is December (Average sunshine: 3.6h).

  • The average UV index in September: 6

The month with the highest UV index is July (UV index 9).
The month with the lowest UV index is December (UV index 1).

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