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September Weather in Alvaiazere, Portugal

Last updated: August 27, 2025

In September, the average temperature in Alvaiazere, Portugal hovers around 20°C (69°F). Expect a minimum of 9°C (48°F) and a sweltering maximum that can soar up to 37°C (99°F). With an average humidity of 67%, you might feel the warmth a bit more. Rainfall is moderate, with 39 mm (1.5 in) expected over 3 days.

September Temperature in Alvaiazere

In September in Alvaiazere, the average temperature is 20°C (69°F). The maximum can reach 37°C (99°F), and the minimum can be as low as 9°C (48°F). This makes Alvaiazere an ideal destination for travelers seeking a mix of warm days and cool evenings.

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

The chart illustrates September temperature patterns in Alvaiazere, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Alvaiazere, September typically has an average temperature of 20°C (69°F), with highs reaching up to 37°C (99°F) and lows dropping to around 9°C (48°F).
JanFebMarAprMayJunJulAugSepOctNovDec485254576366707069635451
Data source: Temperature data for Alvaiazere 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 Alvaiazere

In Alvaiazere in September, the precipitation amount is 39 mm (1.5 in) over a span of 3 days.

September Precipitation Trends in Alvaiazere

The chart displays monthly precipitation patterns in Alvaiazere, 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 Alvaiazere, September typically receives around 39 mm (1.5 inches) of precipitation spread over approximately 3 days.
JanFebMarAprMayJunJulAugSepOctNovDec5574112112602579398311193
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Alvaiazere

In Alvaiazere in September, humidity is 67%. With an average temperature of 20°C (69°F), this humidity feels like a warm, gentle embrace that clings to your skin, creating a comfortable yet slightly sticky atmosphere that can be refreshing while exploring the sights, provided you stay hydrated and take breaks in the shade.

September Average Humidity in Alvaiazere

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

In Alvaiazere 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 Alvaiazere.

Maximum UV Index Levels in Alvaiazere for September

The chart shows the monthly maximum UV Index (UVI) for Alvaiazere 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 Alvaiazere typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec346810111098643
Data source: Alvaiazere 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 Alvaiazere Compares to Other Months

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

This table compares monthly weather conditions in Alvaiazere, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather9°C (48°F)55 mm (2.2 inches)85%moderate
February Weather11°C (52°F)74 mm (2.9 inches)75%moderate
March Weather12°C (54°F)112 mm (4.4 inches)72%high
April Weather14°C (57°F)112 mm (4.4 inches)70%very high
May Weather17°C (63°F)60 mm (2.4 inches)70%very high
June Weather19°C (66°F)25 mm (1.0 inches)63%extreme
July Weather21°C (70°F)7 mm (0.3 inches)60%very high
August Weather21°C (70°F)9 mm (0.3 inches)60%very high
September Weather20°C (69°F)39 mm (1.5 inches)67%very high
October Weather17°C (63°F)83 mm (3.3 inches)74%high
November Weather12°C (55°F)111 mm (4.4 inches)83%moderate
December Weather11°C (52°F)93 mm (3.7 inches)85%moderate

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