September Weather in Sieci, Italy

Last updated: August 23, 2025

In September, the average temperature in Sieci, Italy hovers around 18°C (65°F), providing a comfortable climate for various activities. Expect some fluctuation, with minimums dipping to 5°C (42°F) and maximums soaring to 29°C (84°F). However, be prepared for potential rain, as 83 mm (3.3 in) of precipitation may occur over 10 days, complemented by an average humidity level of 66%.

September Temperature in Sieci

In September in Sieci, the average temperature is 18°C (65°F). Maximum temperatures can reach 29°C (84°F) and minimum temperatures can be as low as 5°C (42°F). It's a great time to explore outdoor activities while packing layers to accommodate the temperature fluctuations.

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

The chart illustrates September temperature patterns in Sieci, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Sieci, September typically has an average temperature of 18°C (65°F), with highs reaching up to 29°C (84°F) and lows dropping to around 5°C (42°F).

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

September Precipitation in Sieci

In Sieci in September, the total precipitation amount is 83 mm (3.3 in) over a span of 10 days.

September Precipitation Trends in Sieci

The chart displays monthly precipitation patterns in Sieci, 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 Sieci, September typically receives around 83 mm (3.3 inches) of precipitation spread over approximately 10 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 Sieci

In Sieci in September humidity is 66%. With an average temperature of 18°C (65°F), this humidity feels like a warm embrace, making travel comfortable yet slightly sticky, perfect for leisurely strolls but requiring light, breathable clothing to fully enjoy the experience.

September Average Humidity in Sieci

This chart illustrates the average monthly humidity levels in Sieci, 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 Sieci is approximately 66%, 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 Sieci

In Sieci 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 Sieci.

Maximum UV Index Levels in Sieci for September

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

Data source: Sieci 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 Sieci Compares to Other Months

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

This table compares monthly weather conditions in Sieci, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	3°C (38°F)	61 mm (2.4 inches)	84%	low
February Weather	6°C (43°F)	105 mm (4.1 inches)	76%	moderate
March Weather	7°C (45°F)	89 mm (3.5 inches)	68%	high
April Weather	11°C (52°F)	96 mm (3.8 inches)	70%	high
May Weather	15°C (59°F)	126 mm (5.0 inches)	69%	very high
June Weather	20°C (68°F)	58 mm (2.3 inches)	62%	very high
July Weather	22°C (73°F)	46 mm (1.8 inches)	57%	very high
August Weather	23°C (73°F)	43 mm (1.7 inches)	55%	very high
September Weather	18°C (65°F)	83 mm (3.3 inches)	66%	high
October Weather	13°C (56°F)	94 mm (3.7 inches)	79%	moderate
November Weather	9°C (48°F)	143 mm (5.6 inches)	84%	moderate
December Weather	5°C (41°F)	138 mm (5.4 inches)	83%	low