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September Weather in Santo Andre, Portugal

Last updated: August 27, 2025

In Santo Andre, Portugal, the average temperature in September is a pleasant 22°C (72°F). However, be prepared for a range: temperatures can dip to a chilly 8°C (47°F) at night or soar up to a sizzling 38°C (101°F) during the day. Expect 28 mm (1.1 in) of rain over about 3 days, and with an average humidity of 67%, it’s a perfect time to enjoy all that this vibrant destination has to offer!

September Temperature in Santo Andre

In September in Santo Andre, the average temperature is 22°C (72°F). Maximum can reach 38°C (101°F) and minimum can be as low as 8°C (47°F). This varied climate makes Santo Andre an ideal destination for travelers seeking both warm days and cooler evenings.

September Weather in Santo Andre: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Santo Andre, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Santo Andre, September typically has an average temperature of 22°C (72°F), with highs reaching up to 38°C (101°F) and lows dropping to around 8°C (47°F).
JanFebMarAprMayJunJulAugSepOctNovDec495456596770747572665652
Data source: Temperature data for Santo Andre 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 Santo Andre

In Santo Andre in September, the precipitation amount is 28 mm (1.1 in) over the course of 3 days.

September Precipitation Trends in Santo Andre

The chart displays monthly precipitation patterns in Santo Andre, 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 Santo Andre, September typically receives around 28 mm (1.1 inches) of precipitation spread over approximately 3 days.
JanFebMarAprMayJunJulAugSepOctNovDec3550808139155728437357
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Santo Andre

In Santo Andre in September humidity is 67%. With an average temperature of 22°C (72°F), this humidity feels like a warm embrace, creating a tropical ambiance that can be both refreshing and slightly stifling for traveling.

September Average Humidity in Santo Andre

This chart illustrates the average monthly humidity levels in Santo Andre, 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 Santo Andre 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 Santo Andre

In Santo Andre 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 Santo Andre.

Maximum UV Index Levels in Santo Andre for September

The chart shows the monthly maximum UV Index (UVI) for Santo Andre 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 Santo Andre typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec35689111098643
Data source: Santo Andre 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 Santo Andre Compares to Other Months

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

This table compares monthly weather conditions in Santo Andre, 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 (54°F)50 mm (2.0 inches)75%moderate
March Weather13°C (56°F)80 mm (3.1 inches)72%high
April Weather15°C (60°F)81 mm (3.2 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 Weather23°C (74°F)5 mm (0.2 inches)60%very high
August Weather24°C (75°F)6 mm (0.3 inches)60%very high
September Weather22°C (72°F)28 mm (1.1 inches)67%very high
October Weather19°C (66°F)43 mm (1.7 inches)74%high
November Weather13°C (56°F)73 mm (2.9 inches)83%moderate
December Weather11°C (53°F)57 mm (2.2 inches)85%moderate

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