September Weather in Sermonde, Portugal

Last updated: August 27, 2025

The average temperature in Sermonde, Portugal during September hovers around 20°C (68°F). Expect a minimum of 10°C (50°F) and a maximum of 34°C (93°F), creating a pleasant range for outdoor activities. During this time, anticipate about 45 mm (1.8 in) of precipitation spread over 6 days, contributing to the region's lush scenery. With an average humidity of 71%, the air feels comfortably fresh and invigorating.

September Temperature in Sermonde

In September in Sermonde, the average temperature is 20°C (68°F). Maximum temperatures can reach 34°C (93°F), while minimums can drop to as low as 10°C (50°F). This pleasant climate makes Sermonde an ideal destination for travelers looking to enjoy a comfortable and diverse range of outdoor activities.

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

The chart illustrates September temperature patterns in Sermonde, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Sermonde, September typically has an average temperature of 20°C (68°F), with highs reaching up to 34°C (93°F) and lows dropping to around 10°C (50°F).

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

September Precipitation in Sermonde

In Sermonde in September, the precipitation amount is 45 mm (1.8 in) over the course of 6 days.

September Precipitation Trends in Sermonde

The chart displays monthly precipitation patterns in Sermonde, 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 Sermonde, September typically receives around 45 mm (1.8 inches) of precipitation spread over approximately 6 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 Sermonde

In Sermonde in September, humidity is 71%. With an average temperature of 20°C (68°F), this humidity feels like a warm, moist embrace that can quickly lead to discomfort for travelers. The air clings to your skin, making even short walks feel more strenuous, while reaching for a refreshing drink becomes essential to stay hydrated.

September Average Humidity in Sermonde

This chart illustrates the average monthly humidity levels in Sermonde, 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 Sermonde is approximately 71%, 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 Sermonde

In Sermonde 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 Sermonde.

Maximum UV Index Levels in Sermonde for September

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

Data source: Sermonde 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 Sermonde Compares to Other Months

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

This table compares monthly weather conditions in Sermonde, 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 (48°F)	90 mm (3.5 inches)	87%	low
February Weather	11°C (52°F)	138 mm (5.4 inches)	81%	moderate
March Weather	12°C (53°F)	144 mm (5.7 inches)	78%	high
April Weather	14°C (57°F)	154 mm (6.1 inches)	79%	very high
May Weather	17°C (62°F)	84 mm (3.3 inches)	78%	very high
June Weather	18°C (65°F)	55 mm (2.1 inches)	71%	extreme
July Weather	20°C (69°F)	24 mm (1.0 inches)	63%	very high
August Weather	21°C (69°F)	19 mm (0.7 inches)	64%	very high
September Weather	20°C (68°F)	45 mm (1.8 inches)	71%	very high
October Weather	16°C (62°F)	120 mm (4.7 inches)	79%	high
November Weather	12°C (54°F)	164 mm (6.5 inches)	86%	moderate
December Weather	11°C (51°F)	194 mm (7.6 inches)	87%	low