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September Weather in Arrentela, Portugal

Last updated: August 27, 2025

In September, the average temperature in Arrentela, Portugal hovers around 21°C (69°F). Expect a comfortable range, with minimums dipping to 14°C (57°F) and maximums peaking at 30°C (86°F). During this time, the area receives about 18 mm (0.7 in) of precipitation over approximately 2 days, contributing to an average humidity of 67%. Perfect for experiencing the local ambiance!

September Temperature in Arrentela

In September in Arrentela, the average temperature is 21°C (69°F). Maximums can reach 30°C (86°F), and minimums can be as low as 14°C (57°F). This pleasant climate makes Arrentela an ideal destination for outdoor activities and exploration during this time of year.

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

The chart illustrates September temperature patterns in Arrentela, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Arrentela, September typically has an average temperature of 21°C (69°F), with highs reaching up to 30°C (86°F) and lows dropping to around 14°C (57°F).
JanFebMarAprMayJunJulAugSepOctNovDec545657596466697069655956
Data source: Temperature data for Arrentela generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Arrentela

In Arrentela in September, the precipitation amount is 18 mm (0.7 in) over the course of 2 days.

September Precipitation Trends in Arrentela

The chart displays monthly precipitation patterns in Arrentela, 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 Arrentela, September typically receives around 18 mm (0.7 inches) of precipitation spread over approximately 2 days.
JanFebMarAprMayJunJulAugSepOctNovDec345366633184318397054
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Arrentela

In Arrentela in September, humidity is 67%. With an average temperature of 21°C (69°F), this humidity feels like a warm, enveloping embrace, making travel enjoyable yet slightly sticky. It encourages you to seek shade and sip cool drinks while exploring, adding a tropical flair to your adventures.

September Average Humidity in Arrentela

This chart illustrates the average monthly humidity levels in Arrentela, 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 Arrentela is approximately 67%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%75%72%70%70%63%60%60%68%74%83%85%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Arrentela

In Arrentela 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 Arrentela.

Maximum UV Index Levels in Arrentela for September

The chart shows the monthly maximum UV Index (UVI) for Arrentela 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 Arrentela typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec356910111098643
Data source: Arrentela 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 Arrentela Compares to Other Months

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

This table compares monthly weather conditions in Arrentela, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather12°C (54°F)34 mm (1.3 inches)85%moderate
February Weather13°C (56°F)53 mm (2.1 inches)75%moderate
March Weather14°C (58°F)66 mm (2.6 inches)72%high
April Weather15°C (60°F)63 mm (2.5 inches)70%very high
May Weather18°C (64°F)31 mm (1.2 inches)70%very high
June Weather19°C (67°F)8 mm (0.3 inches)63%extreme
July Weather21°C (70°F)4 mm (0.2 inches)60%very high
August Weather21°C (71°F)3 mm (0.1 inches)60%very high
September Weather21°C (69°F)18 mm (0.7 inches)67%very high
October Weather19°C (66°F)39 mm (1.5 inches)74%high
November Weather15°C (60°F)69 mm (2.7 inches)83%moderate
December Weather14°C (57°F)54 mm (2.1 inches)85%moderate

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