September Weather in Grassano, Italy

Last updated: August 23, 2025

In September, the average temperature in Grassano, Italy is a pleasant 21°C (70°F). Expect temperatures to range from a cool 9°C (48°F) at night to a warm 35°C (95°F) during the day. With 33 mm (1.3 in) of precipitation spread over 8 days, you may encounter some rain, so it's wise to pack an umbrella. The average humidity is a comfortable 66%, making it an enjoyable time to explore the area!

September Temperature in Grassano

In September in Grassano, the average temperature is 21°C (70°F), with maximums reaching 35°C (95°F) and minimums dipping as low as 9°C (48°F). This makes Grassano an ideal destination for travelers seeking mild weather with the chance to enjoy warm days and cooler evenings.

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

The chart illustrates September temperature patterns in Grassano, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Grassano, September typically has an average temperature of 21°C (70°F), with highs reaching up to 35°C (95°F) and lows dropping to around 9°C (48°F).

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

September Precipitation in Grassano

In Grassano in September, the precipitation amount is 33 mm (1.3 in) during a span of 8 days.

September Precipitation Trends in Grassano

The chart displays monthly precipitation patterns in Grassano, 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 Grassano, September typically receives around 33 mm (1.3 inches) of precipitation spread over approximately 8 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 Grassano

In Grassano in September humidity is 66%. With an average temperature of 21°C (70°F), this humidity feels like a warm embrace, making it comfortable for leisurely strolls but slightly sticky for longer excursions.

September Average Humidity in Grassano

This chart illustrates the average monthly humidity levels in Grassano, 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 Grassano 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 Grassano

In Grassano in September, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Grassano.

Maximum UV Index Levels in Grassano for September

The chart shows the monthly maximum UV Index (UVI) for Grassano 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 Grassano typically reaches 8, which falls under the very high exposure category.

Data source: Grassano 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 Grassano Compares to Other Months

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

This table compares monthly weather conditions in Grassano, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	5°C (42°F)	51 mm (2.0 inches)	82%	moderate
February Weather	8°C (46°F)	53 mm (2.1 inches)	74%	moderate
March Weather	9°C (48°F)	57 mm (2.2 inches)	70%	high
April Weather	13°C (55°F)	62 mm (2.4 inches)	71%	very high
May Weather	17°C (64°F)	66 mm (2.6 inches)	71%	very high
June Weather	23°C (73°F)	51 mm (2.0 inches)	65%	very high
July Weather	26°C (78°F)	24 mm (0.9 inches)	61%	very high
August Weather	26°C (79°F)	36 mm (1.4 inches)	56%	very high
September Weather	21°C (70°F)	33 mm (1.3 inches)	66%	very high
October Weather	16°C (61°F)	52 mm (2.0 inches)	74%	high
November Weather	12°C (53°F)	101 mm (4.0 inches)	80%	moderate
December Weather	8°C (46°F)	51 mm (2.0 inches)	82%	low