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September Weather in Rosais, Portugal

Last updated: August 27, 2025

In September, the average temperature in Rosais, Portugal is a pleasant 22°C (71°F). You can expect a minimum temperature of 18°C (66°F) and a comfortable maximum of 25°C (76°F). Though it’s a lovely time of year, be prepared for precipitation averaging 51 mm (2.0 in) over about 10 days, and don’t forget that the average humidity hovers around a notable 83%.

September Temperature in Rosais

In September in Rosais, the average temperature is 22°C (71°F). Maximums can reach 25°C (76°F), while minimums can dip as low as 18°C (66°F). This pleasant climate makes it an ideal time for travelers to explore and enjoy outdoor activities.

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

The chart illustrates September temperature patterns in Rosais, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Rosais, September typically has an average temperature of 22°C (71°F), with highs reaching up to 25°C (76°F) and lows dropping to around 18°C (66°F).
JanFebMarAprMayJunJulAugSepOctNovDec605959596265697271686462
Data source: Temperature data for Rosais 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 Rosais

In Rosais in September, the total precipitation amount is 51 mm (2.0 in) spread over a period of 10 days.

September Precipitation Trends in Rosais

The chart displays monthly precipitation patterns in Rosais, 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 Rosais, September typically receives around 51 mm (2.0 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec84775675584028525175122103
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Rosais

In Rosais in September humidity is 83%. With an average temperature of 22°C (71°F), this humidity feels like a warm blanket wrapping around you, making travel a bit sticky but still enjoyable, as long as you stay hydrated and take breaks in the shade.

September Average Humidity in Rosais

This chart illustrates the average monthly humidity levels in Rosais, 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 Rosais is approximately 83%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%83%85%85%83%85%86%83%83%79%80%85%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Rosais

In Rosais 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 Rosais.

Maximum UV Index Levels in Rosais for September

The chart shows the monthly maximum UV Index (UVI) for Rosais 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 Rosais typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3578101110109743
Data source: Rosais 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 Rosais Compares to Other Months

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

This table compares monthly weather conditions in Rosais, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather16°C (61°F)84 mm (3.3 inches)84%moderate
February Weather15°C (59°F)77 mm (3.0 inches)83%moderate
March Weather15°C (59°F)56 mm (2.2 inches)85%high
April Weather15°C (60°F)75 mm (2.9 inches)85%very high
May Weather16°C (62°F)58 mm (2.3 inches)83%very high
June Weather19°C (66°F)40 mm (1.6 inches)85%extreme
July Weather21°C (70°F)28 mm (1.1 inches)86%very high
August Weather22°C (72°F)51 mm (2.0 inches)83%very high
September Weather22°C (71°F)51 mm (2.0 inches)83%very high
October Weather20°C (68°F)75 mm (2.9 inches)79%high
November Weather18°C (65°F)122 mm (4.8 inches)80%moderate
December Weather17°C (62°F)103 mm (4.1 inches)85%moderate

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