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September Weather in Santo Isidoro, Portugal

Last updated: August 27, 2025

In September, the average temperature in Santo Isidoro, Portugal is a pleasant 18°C (65°F). With a minimum of 15°C (59°F) and a maximum of 24°C (75°F), it's a comfortable time for outdoor activities. Expect some light rain, as the area gets about 32 mm (1.3 in) of precipitation over 2 days. The average humidity sits at 67%, making for a refreshing, but slightly muggy atmosphere.

September Temperature in Santo Isidoro

In September in Santo Isidoro, the average temperature is 18°C (65°F). The maximum can reach 24°C (75°F), while the minimum can be as low as 15°C (59°F). This pleasant weather makes it an ideal time for outdoor activities and sightseeing in Santo Isidoro.

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

The chart illustrates September temperature patterns in Santo Isidoro, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Santo Isidoro, September typically has an average temperature of 18°C (65°F), with highs reaching up to 24°C (75°F) and lows dropping to around 15°C (59°F).
JanFebMarAprMayJunJulAugSepOctNovDec555656576062646464635957
Data source: Temperature data for Santo Isidoro 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 Isidoro

In Santo Isidoro in September, the precipitation amount is 32 mm (1.3 in) over a duration of 2 days.

September Precipitation Trends in Santo Isidoro

The chart displays monthly precipitation patterns in Santo Isidoro, 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 Isidoro, September typically receives around 32 mm (1.3 inches) of precipitation spread over approximately 2 days.
JanFebMarAprMayJunJulAugSepOctNovDec4863697739166632639982
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Santo Isidoro

In Santo Isidoro in September humidity is 67%. With an average temperature of 18°C (65°F), this humidity feels like a mild blanket wrapping around you, making outdoor activities feel pleasantly refreshing, yet you may find yourself reaching for a drink more often to stay hydrated while exploring the sights.

September Average Humidity in Santo Isidoro

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

In Santo Isidoro 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 Isidoro.

Maximum UV Index Levels in Santo Isidoro for September

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

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

This table compares monthly weather conditions in Santo Isidoro, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather13°C (55°F)48 mm (1.9 inches)85%moderate
February Weather13°C (56°F)63 mm (2.5 inches)75%moderate
March Weather13°C (56°F)69 mm (2.7 inches)72%high
April Weather14°C (58°F)77 mm (3.0 inches)70%very high
May Weather16°C (61°F)39 mm (1.5 inches)70%very high
June Weather17°C (62°F)16 mm (0.6 inches)63%extreme
July Weather18°C (64°F)6 mm (0.2 inches)60%very high
August Weather18°C (64°F)6 mm (0.2 inches)60%very high
September Weather18°C (65°F)32 mm (1.3 inches)67%very high
October Weather17°C (63°F)63 mm (2.5 inches)74%high
November Weather15°C (60°F)99 mm (3.9 inches)83%moderate
December Weather14°C (58°F)82 mm (3.2 inches)85%moderate

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