September Weather in Rome, United States

Last updated: June 24, 2025

In September, the average temperature in Rome, United States hovers around 17°C (62°F), with a comfortable range from a chilly 2°C (36°F) to a warm 30°C (86°F). Expect about 68 mm (2.7 in) of precipitation over 7 days, contributing to an average humidity of 77%. Enjoy the blend of mild weather and refreshing rain during your stay!

September Temperature in Rome

In September in Rome, the average temperature is 17°C (62°F). Maximum temperatures can reach 30°C (86°F), while minimums can drop as low as 2°C (36°F). Be prepared for a range of weather conditions, making it ideal for both warm days and cooler evenings when traveling.

September Weather in Rome: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Rome, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Rome, September typically has an average temperature of 17°C (62°F), with highs reaching up to 30°C (86°F) and lows dropping to around 2°C (36°F).

Data source: Temperature data for Rome generated using information from the Copernicus Climate Change Service.

September Precipitation in Rome

In Rome in September, the precipitation amount is 68 mm (2.7 in) over the course of 7 days.

September Precipitation Trends in Rome

The chart displays monthly precipitation patterns in Rome, with values for each month alongside September’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September’s conditions compare to those of other months. In Rome, September typically receives around 68 mm (2.7 inches) of precipitation spread over approximately 7 days.

Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

September Humidity in Rome

In Rome in September humidity is 77%. With an average temperature of 17°C (62°F), this humidity feels like a warm embrace, creating a lush, almost tropical atmosphere that can be quite stifling for traveling, making it essential to stay hydrated and take frequent breaks in the shade.

September Average Humidity in Rome

This chart illustrates the average monthly humidity levels in Rome, with September’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In September, average humidity in Rome is approximately 77%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Rome

In Rome in September, the maximum UV index is 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more detailed information, you can check the Hourly UV Index in Rome.

Maximum UV Index Levels in Rome for September

The chart shows the monthly maximum UV Index (UVI) for Rome in September, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In September, the maximum UV index in Rome typically reaches 7, which falls under the high exposure category.

Data source: Rome September UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

Extreme (11+): Avoid the sun, stay in shade.
Very High (8-10): Limit sun exposure.
High (6-7): Use SPF 30+ and protective clothing.
Moderate (3-5): Midday shade recommended.
Low (0-2): No protection needed.

How September Weather in Rome Compares to Other Months

Weather in Rome varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Rome, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Rome, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-6°C (22°F)	82 mm (3.2 inches)	88%	low
February Weather	-4°C (24°F)	82 mm (3.2 inches)	88%	moderate
March Weather	-1°C (31°F)	71 mm (2.8 inches)	85%	moderate
April Weather	6°C (43°F)	116 mm (4.6 inches)	81%	high
May Weather	13°C (55°F)	81 mm (3.2 inches)	76%	very high
June Weather	18°C (65°F)	68 mm (2.7 inches)	74%	very high
July Weather	21°C (70°F)	112 mm (4.4 inches)	74%	very high
August Weather	21°C (70°F)	74 mm (2.9 inches)	74%	very high
September Weather	17°C (62°F)	68 mm (2.7 inches)	77%	high
October Weather	11°C (51°F)	123 mm (4.8 inches)	82%	moderate
November Weather	3°C (37°F)	107 mm (4.2 inches)	85%	moderate
December Weather	-3°C (27°F)	109 mm (4.3 inches)	84%	low