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September Weather in Grandola, Portugal

Last updated: August 27, 2025

In Grandola, Portugal, the average temperature in September hovers around 22°C (71°F), offering a pleasant climate. However, be prepared for a range, as temperatures can dip to a cool 10°C (51°F) and soar to a hot 38°C (100°F). Rainfall is light, with only 18 mm (0.7 in) expected over 2 days, and the average humidity sits at a comfortable 67%.

September Temperature in Grandola

In September in Grandola, the average temperature is 22°C (71°F). Maximums can reach 38°C (100°F) and minimums can be as low as 10°C (51°F). This makes Grandola an ideal destination for travelers seeking a warm getaway during the day while enjoying cooler evenings.

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

The chart illustrates September temperature patterns in Grandola, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Grandola, September typically has an average temperature of 22°C (71°F), with highs reaching up to 38°C (100°F) and lows dropping to around 10°C (51°F).
JanFebMarAprMayJunJulAugSepOctNovDec505457596669727471665754
Data source: Temperature data for Grandola 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 Grandola

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

September Precipitation Trends in Grandola

The chart displays monthly precipitation patterns in Grandola, 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 Grandola, September typically receives around 18 mm (0.7 inches) of precipitation spread over approximately 2 days.
JanFebMarAprMayJunJulAugSepOctNovDec305281733193218425649
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Grandola

In Grandola in September, humidity is 67%. With an average temperature of 22°C (71°F), this humidity feels like a warm embrace, making outdoor activities enjoyable yet slightly uncomfortable, as the air hangs thick, reminding travelers to stay hydrated and seek shade during the midday sun.

September Average Humidity in Grandola

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

In Grandola in September, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Grandola.

Maximum UV Index Levels in Grandola for September

The chart shows the monthly maximum UV Index (UVI) for Grandola 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 Grandola typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec356910111099643
Data source: Grandola 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 Grandola Compares to Other Months

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

This table compares monthly weather conditions in Grandola, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather10°C (51°F)30 mm (1.2 inches)85%moderate
February Weather12°C (55°F)52 mm (2.0 inches)75%moderate
March Weather14°C (57°F)81 mm (3.2 inches)72%high
April Weather15°C (60°F)73 mm (2.9 inches)70%very high
May Weather19°C (66°F)30 mm (1.2 inches)70%very high
June Weather20°C (69°F)9 mm (0.4 inches)63%extreme
July Weather22°C (72°F)3 mm (0.1 inches)60%very high
August Weather23°C (74°F)2 mm (0.1 inches)60%very high
September Weather22°C (71°F)18 mm (0.7 inches)67%very high
October Weather19°C (66°F)42 mm (1.6 inches)74%high
November Weather14°C (58°F)56 mm (2.2 inches)83%moderate
December Weather12°C (54°F)49 mm (1.9 inches)85%moderate

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