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September Weather in Avis, Portugal

Last updated: August 27, 2025

In September, the average temperature in Avis, Portugal hovers around 22°C (73°F), making it a pleasant time to visit. However, be prepared for temperature swings, as it can drop as low as 8°C (47°F) or soar to a scorching 38°C (100°F). Expect a moderate precipitation of about 25 mm (1.0 in) spread over 3 days, and a comfortable average humidity of 67%.

September Temperature in Avis

In September in Avis, the average temperature is 22°C (73°F). Maximums can reach 38°C (100°F), while minimums can drop to as low as 8°C (47°F). Be prepared for a wide range of temperatures during your travels, ensuring both warm weather gear and cooler clothing.

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

The chart illustrates September temperature patterns in Avis, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Avis, September typically has an average temperature of 22°C (73°F), with highs reaching up to 38°C (100°F) and lows dropping to around 8°C (47°F).
JanFebMarAprMayJunJulAugSepOctNovDec485355596670747572655652
Data source: Temperature data for Avis 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 Avis

In Avis in September, the precipitation amount is 25 mm (1.0 in) over the course of 3 days.

September Precipitation Trends in Avis

The chart displays monthly precipitation patterns in Avis, 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 Avis, September typically receives around 25 mm (1.0 inches) of precipitation spread over approximately 3 days.
JanFebMarAprMayJunJulAugSepOctNovDec3649858439155725437261
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Avis

In Avis in September, humidity is 67%. With an average temperature of 22°C (73°F), this humidity feels like a warm, damp blanket enveloping you, making outdoor activities slightly uncomfortable but still bearable for travelers who enjoy a tropical atmosphere.

September Average Humidity in Avis

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

In Avis 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 Avis.

Maximum UV Index Levels in Avis for September

The chart shows the monthly maximum UV Index (UVI) for Avis 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 Avis typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec34689111098643
Data source: Avis 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 Avis Compares to Other Months

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

This table compares monthly weather conditions in Avis, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather9°C (49°F)35 mm (1.4 inches)85%moderate
February Weather12°C (53°F)49 mm (1.9 inches)75%moderate
March Weather13°C (56°F)85 mm (3.3 inches)72%high
April Weather15°C (59°F)84 mm (3.3 inches)70%very high
May Weather19°C (67°F)39 mm (1.5 inches)70%very high
June Weather21°C (70°F)15 mm (0.6 inches)63%extreme
July Weather24°C (75°F)4 mm (0.2 inches)60%very high
August Weather24°C (76°F)6 mm (0.3 inches)60%very high
September Weather22°C (73°F)25 mm (1.0 inches)67%very high
October Weather18°C (66°F)43 mm (1.7 inches)74%high
November Weather13°C (56°F)72 mm (2.8 inches)83%moderate
December Weather11°C (52°F)61 mm (2.4 inches)85%moderate

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