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September Weather in Caldelas, Portugal

Last updated: August 27, 2025

In Caldelas, Portugal, the average temperature in September hovers around 19°C (66°F). Temperatures can vary significantly, with a low of 7°C (44°F) and a high of 33°C (92°F). Expect about 59 mm (2.3 in) of precipitation over 7 days, accompanied by an average humidity of 71%. Stay prepared for a blend of warm and refreshing days!

September Temperature in Caldelas

In September in Caldelas, the average temperature is 19°C (66°F), with maximums reaching up to 33°C (92°F) and minimums dropping as low as 7°C (44°F). This mild climate makes it an ideal time for outdoor adventures and sightseeing.

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

The chart illustrates September temperature patterns in Caldelas, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Caldelas, September typically has an average temperature of 19°C (66°F), with highs reaching up to 33°C (92°F) and lows dropping to around 7°C (44°F).
JanFebMarAprMayJunJulAugSepOctNovDec464951556063686866595249
Data source: Temperature data for Caldelas 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 Caldelas

In Caldelas in September, the precipitation amount is 59 mm (2.3 in) over a span of 7 days.

September Precipitation Trends in Caldelas

The chart displays monthly precipitation patterns in Caldelas, 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 Caldelas, September typically receives around 59 mm (2.3 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec14720920517911970343459166228273
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Caldelas

In Caldelas in September humidity is 71%. With an average temperature of 19°C (66°F), this humidity feels like a warm, balmy embrace that enhances the tropical atmosphere, making it a perfect backdrop for leisurely strolls and outdoor adventures, though it may also lead to a slightly sticky feeling as you explore.

September Average Humidity in Caldelas

This chart illustrates the average monthly humidity levels in Caldelas, 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 Caldelas is approximately 71%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%81%78%79%78%71%63%64%71%79%86%87%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Caldelas

In Caldelas 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 Caldelas.

Maximum UV Index Levels in Caldelas for September

The chart shows the monthly maximum UV Index (UVI) for Caldelas 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 Caldelas typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec24689111098642
Data source: Caldelas 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 Caldelas Compares to Other Months

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

This table compares monthly weather conditions in Caldelas, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather8°C (46°F)147 mm (5.8 inches)87%low
February Weather10°C (50°F)209 mm (8.2 inches)81%moderate
March Weather11°C (51°F)205 mm (8.1 inches)78%high
April Weather13°C (55°F)179 mm (7.0 inches)79%very high
May Weather16°C (61°F)119 mm (4.7 inches)78%very high
June Weather17°C (64°F)70 mm (2.8 inches)71%extreme
July Weather20°C (68°F)34 mm (1.3 inches)63%very high
August Weather20°C (68°F)34 mm (1.4 inches)64%very high
September Weather19°C (66°F)59 mm (2.3 inches)71%very high
October Weather15°C (59°F)166 mm (6.5 inches)79%high
November Weather11°C (52°F)228 mm (9.0 inches)86%moderate
December Weather9°C (49°F)273 mm (10.8 inches)87%low

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