September Weather in Grosso, Italy

Last updated: August 23, 2025

In Grosso, Italy, the average temperature in September is 16°C (61°F), with daily highs reaching up to 26°C (79°F) and lows dropping to a minimum of 3°C (38°F). Visitors can expect approximately 124 mm (4.9 in) of precipitation spread over 15 days, contributing to an average humidity level of 73%.

September Temperature in Grosso

In September, in Grosso, the average temperature is 16°C (61°F). Maximum temperatures can reach 26°C (79°F), while minimums can drop as low as 3°C (38°F). It's a great time to explore Grosso, but be sure to pack layers to accommodate the varying temperatures throughout the day.

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

The chart illustrates September temperature patterns in Grosso, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Grosso, September typically has an average temperature of 16°C (61°F), with highs reaching up to 26°C (79°F) and lows dropping to around 3°C (38°F).

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

September Precipitation in Grosso

In Grosso in September, the total precipitation amount is 124 mm (4.9 in) over a period of 15 days.

September Precipitation Trends in Grosso

The chart displays monthly precipitation patterns in Grosso, 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 Grosso, September typically receives around 124 mm (4.9 inches) of precipitation spread over approximately 15 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 Grosso

In Grosso in September, humidity is 73%. With an average temperature of 16°C (61°F), this humidity feels like a warm, sticky embrace that can make traveling slightly uncomfortable, prompting you to seek shade and stay hydrated while exploring the sights.

September Average Humidity in Grosso

This chart illustrates the average monthly humidity levels in Grosso, 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 Grosso is approximately 73%, 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 Grosso

In Grosso 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 Grosso.

Maximum UV Index Levels in Grosso for September

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

Data source: Grosso 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 Grosso Compares to Other Months

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

This table compares monthly weather conditions in Grosso, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	1°C (34°F)	75 mm (3.0 inches)	91%	low
February Weather	4°C (39°F)	57 mm (2.2 inches)	87%	moderate
March Weather	6°C (43°F)	111 mm (4.4 inches)	84%	high
April Weather	10°C (50°F)	160 mm (6.3 inches)	83%	high
May Weather	14°C (57°F)	185 mm (7.3 inches)	78%	very high
June Weather	18°C (65°F)	215 mm (8.5 inches)	75%	very high
July Weather	20°C (68°F)	205 mm (8.1 inches)	72%	very high
August Weather	20°C (68°F)	174 mm (6.9 inches)	63%	very high
September Weather	16°C (61°F)	124 mm (4.9 inches)	73%	high
October Weather	11°C (52°F)	186 mm (7.3 inches)	89%	moderate
November Weather	6°C (43°F)	181 mm (7.1 inches)	90%	moderate
December Weather	1°C (35°F)	79 mm (3.1 inches)	90%	low