September Weather in San Martino in Rio, Italy

Last updated: August 23, 2025

In September, the average temperature in San Martino in Rio, Italy is a comfortable 20°C (69°F). You'll experience a range of temperatures, with a minimum of 8°C (46°F) and a maximum of 34°C (93°F). Be prepared for some rain, as the month brings about 93 mm (3.7 in) of precipitation spread over 10 days. The average humidity is around 66%, adding to the pleasant atmosphere of this vibrant location.

September Temperature in San Martino in Rio

In September in San Martino in Rio, the average temperature is 20°C (69°F). The maximum can reach 34°C (93°F) and the minimum can be as low as 8°C (46°F). This makes it an ideal time for travelers to enjoy a variety of outdoor activities while experiencing comfortable weather.

September Weather in San Martino in Rio: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in San Martino in Rio, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In San Martino in Rio, September typically has an average temperature of 20°C (69°F), with highs reaching up to 34°C (93°F) and lows dropping to around 8°C (46°F).

Data source: Temperature data for San Martino in Rio generated using information from the Copernicus Climate Change Service.

September Precipitation in San Martino in Rio

In San Martino in Rio in September, the precipitation amount is 93 mm (3.7 in) over the course of 10 days.

September Precipitation Trends in San Martino in Rio

The chart displays monthly precipitation patterns in San Martino in Rio, 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 San Martino in Rio, September typically receives around 93 mm (3.7 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 San Martino in Rio

In San Martino in Rio in September humidity is 66%. With an average temperature of 20°C (69°F), this humidity feels like a gentle enveloping warmth, making it comfortable for traveling but with a slight stickiness that may encourage you to seek shade or refreshments frequently.

September Average Humidity in San Martino in Rio

This chart illustrates the average monthly humidity levels in San Martino in Rio, 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 San Martino in Rio 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 San Martino in Rio

In San Martino in Rio in September, the maximum UV index is 6, which corresponds to a high Exposure Category. The time to burn is approximately 25 minutes. To find the hourly UV index in San Martino in Rio, you can refer to this Hourly UV Index in San Martino in Rio.

Maximum UV Index Levels in San Martino in Rio for September

The chart shows the monthly maximum UV Index (UVI) for San Martino in Rio 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 San Martino in Rio typically reaches 6, which falls under the high exposure category.

Data source: San Martino in Rio 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 San Martino in Rio Compares to Other Months

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

This table compares monthly weather conditions in San Martino in Rio, 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)	24 mm (0.9 inches)	87%	low
February Weather	7°C (44°F)	62 mm (2.4 inches)	79%	moderate
March Weather	9°C (49°F)	51 mm (2.0 inches)	69%	moderate
April Weather	14°C (57°F)	74 mm (2.9 inches)	71%	high
May Weather	18°C (65°F)	111 mm (4.4 inches)	70%	very high
June Weather	24°C (75°F)	49 mm (1.9 inches)	65%	very high
July Weather	26°C (78°F)	66 mm (2.6 inches)	61%	very high
August Weather	26°C (79°F)	58 mm (2.3 inches)	54%	very high
September Weather	20°C (69°F)	93 mm (3.7 inches)	66%	high
October Weather	15°C (59°F)	66 mm (2.6 inches)	83%	moderate
November Weather	10°C (50°F)	114 mm (4.5 inches)	88%	moderate
December Weather	5°C (41°F)	78 mm (3.1 inches)	85%	low