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September Weather in Constancia, Portugal

Last updated: August 27, 2025

In September, the average temperature in Constancia, Portugal is a pleasant 22°C (71°F). However, be prepared for a range in temperatures, with minimums dipping to 9°C (48°F) and maximums soaring to 38°C (100°F). During this period, you can expect about 30 mm (1.2 in) of precipitation over 4 days, and an average humidity of 67%. Enjoy your time in this vibrant locale!

September Temperature in Constancia

In September in Constancia, the average temperature is 22°C (71°F), with maximums reaching 38°C (100°F) and minimums dropping as low as 9°C (48°F). Overall, it's a great time to visit Constancia to enjoy a mix of warm days and cooler nights.

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

The chart illustrates September temperature patterns in Constancia, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Constancia, 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 9°C (48°F).
JanFebMarAprMayJunJulAugSepOctNovDec485355586568737471645552
Data source: Temperature data for Constancia 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 Constancia

In Constancia in September, the precipitation amount is 30 mm (1.2 in) over the course of 4 days.

September Precipitation Trends in Constancia

The chart displays monthly precipitation patterns in Constancia, 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 Constancia, September typically receives around 30 mm (1.2 inches) of precipitation spread over approximately 4 days.
JanFebMarAprMayJunJulAugSepOctNovDec4261949447195730639468
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Constancia

In Constancia 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 Constancia

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

In Constancia 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 Constancia.

Maximum UV Index Levels in Constancia for September

The chart shows the monthly maximum UV Index (UVI) for Constancia 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 Constancia typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec346810111098643
Data source: Constancia 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 Constancia Compares to Other Months

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

This table compares monthly weather conditions in Constancia, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather9°C (49°F)42 mm (1.7 inches)85%moderate
February Weather12°C (53°F)61 mm (2.4 inches)75%moderate
March Weather13°C (55°F)94 mm (3.7 inches)72%high
April Weather15°C (59°F)94 mm (3.7 inches)70%very high
May Weather19°C (66°F)46 mm (1.8 inches)70%very high
June Weather20°C (69°F)19 mm (0.7 inches)63%extreme
July Weather23°C (73°F)5 mm (0.2 inches)60%very high
August Weather23°C (74°F)7 mm (0.3 inches)60%very high
September Weather22°C (71°F)30 mm (1.2 inches)67%very high
October Weather18°C (65°F)63 mm (2.5 inches)74%high
November Weather13°C (55°F)94 mm (3.7 inches)83%moderate
December Weather11°C (52°F)68 mm (2.7 inches)85%moderate

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