September Weather in Formia, Italy

Last updated: August 23, 2025

In September, the average temperature in Formia, Italy is a pleasant 22°C (73°F). Expect a comfortable range with minimum temperatures dipping to 13°C (56°F) and highs reaching 29°C (84°F). Be prepared for 102 mm (4.0 in) of precipitation over 7 days, contributing to an average humidity of 65%.

September Temperature in Formia

In September in Formia, the average temperature is 22°C (73°F). The maximum can reach 29°C (84°F), while the minimum can dip as low as 13°C (56°F). This mild climate makes it an ideal time for exploring and enjoying outdoor activities.

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

The chart illustrates September temperature patterns in Formia, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Formia, September typically has an average temperature of 22°C (73°F), with highs reaching up to 29°C (84°F) and lows dropping to around 13°C (56°F).

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

September Precipitation in Formia

In Formia in September, the total precipitation amount is 102 mm (4.0 in) over a period of 7 days.

September Precipitation Trends in Formia

The chart displays monthly precipitation patterns in Formia, 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 Formia, September typically receives around 102 mm (4.0 inches) of precipitation spread over approximately 7 days.

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

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Millimeters (mm) Inches (in)

September Humidity in Formia

In Formia in September humidity is 65%. With an average temperature of 22°C (73°F), this humidity feels like a warm embrace—comfortable yet slightly sticky, making outdoor explorations refreshing during the cooler hours while encouraging travelers to stay hydrated and seek shade during the peak sun.

September Average Humidity in Formia

This chart illustrates the average monthly humidity levels in Formia, 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 Formia is approximately 65%, 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 Formia

In Formia 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 Formia.

Maximum UV Index Levels in Formia for September

The chart shows the monthly maximum UV Index (UVI) for Formia 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 Formia typically reaches 7, which falls under the high exposure category.

Data source: Formia 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 Formia Compares to Other Months

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

This table compares monthly weather conditions in Formia, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	9°C (49°F)	96 mm (3.8 inches)	84%	moderate
February Weather	11°C (51°F)	115 mm (4.5 inches)	76%	moderate
March Weather	11°C (53°F)	94 mm (3.7 inches)	69%	moderate
April Weather	14°C (57°F)	64 mm (2.5 inches)	70%	high
May Weather	18°C (64°F)	65 mm (2.5 inches)	70%	very high
June Weather	22°C (72°F)	30 mm (1.2 inches)	61%	very high
July Weather	25°C (77°F)	16 mm (0.6 inches)	57%	very high
August Weather	26°C (79°F)	11 mm (0.4 inches)	53%	very high
September Weather	22°C (73°F)	102 mm (4.0 inches)	65%	high
October Weather	18°C (65°F)	116 mm (4.6 inches)	75%	high
November Weather	15°C (59°F)	316 mm (12.4 inches)	81%	moderate
December Weather	11°C (53°F)	209 mm (8.2 inches)	84%	low