September Weather in Samil, Portugal

Last updated: August 27, 2025

During September, the average temperature in Samil, Portugal hovers around 18°C (65°F). Expect a range from a chilly 5°C (42°F) at night to a warm 32°C (90°F) during the day. The area experiences an average precipitation of 45 mm (1.8 in) spread over about 5 days, contributing to an average humidity level of 63%. Enjoy the diverse weather while exploring!

September Temperature in Samil

In September in Samil, the average temperature is 18°C (65°F). The maximum can reach 32°C (90°F) and the minimum can be as low as 5°C (42°F). It's a great time for travelers to enjoy mild weather while being prepared for both warm and cooler days.

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

The chart illustrates September temperature patterns in Samil, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Samil, September typically has an average temperature of 18°C (65°F), with highs reaching up to 32°C (90°F) and lows dropping to around 5°C (42°F).

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

September Precipitation in Samil

In Samil in September, the total precipitation amount is 45 mm (1.8 in) over a span of 5 days.

September Precipitation Trends in Samil

The chart displays monthly precipitation patterns in Samil, 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 Samil, September typically receives around 45 mm (1.8 inches) of precipitation spread over approximately 5 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 Samil

In Samil in September, humidity is 63%. With an average temperature of 18°C (65°F), this humidity feels like a comfortable embrace, making for an enjoyable travel experience that allows for leisurely exploration without feeling overly sticky or oppressive.

September Average Humidity in Samil

This chart illustrates the average monthly humidity levels in Samil, 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 Samil is approximately 63%, 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 Samil

In Samil 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 Samil.

Maximum UV Index Levels in Samil for September

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

Data source: Samil 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 Samil Compares to Other Months

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

This table compares monthly weather conditions in Samil, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	4°C (40°F)	54 mm (2.1 inches)	91%	low
February Weather	7°C (45°F)	95 mm (3.7 inches)	85%	moderate
March Weather	8°C (47°F)	99 mm (3.9 inches)	79%	high
April Weather	11°C (52°F)	92 mm (3.6 inches)	77%	very high
May Weather	15°C (60°F)	51 mm (2.0 inches)	76%	very high
June Weather	18°C (65°F)	48 mm (1.9 inches)	64%	extreme
July Weather	22°C (71°F)	18 mm (0.7 inches)	54%	very high
August Weather	21°C (71°F)	16 mm (0.6 inches)	52%	very high
September Weather	18°C (65°F)	45 mm (1.8 inches)	63%	very high
October Weather	14°C (57°F)	74 mm (2.9 inches)	78%	high
November Weather	8°C (47°F)	110 mm (4.3 inches)	90%	moderate
December Weather	6°C (43°F)	127 mm (5.0 inches)	91%	low