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September Weather in Vieira de Leiria, Portugal

Last updated: August 27, 2025

In Vieira de Leiria, Portugal, the average temperature in September is a pleasant 19°C (66°F). During this time, you can expect minimum temperatures around 12°C (55°F) and highs reaching 28°C (82°F). With an average humidity of 67%, the air feels comfortable, though you'll experience about 28 mm (1.1 in) of precipitation over 3 days. Perfect for enjoying a mix of sunshine and refreshing showers!

September Temperature in Vieira de Leiria

In September in Vieira de Leiria, the average temperature is 19°C (66°F). Maximums can reach 28°C (82°F), while minimums can drop as low as 12°C (55°F). This mild climate makes it an ideal destination for enjoyable outdoor activities and sightseeing.

September Weather in Vieira de Leiria: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Vieira de Leiria, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Vieira de Leiria, September typically has an average temperature of 19°C (66°F), with highs reaching up to 28°C (82°F) and lows dropping to around 12°C (55°F).
JanFebMarAprMayJunJulAugSepOctNovDec525455576163666666635755
Data source: Temperature data for Vieira de Leiria 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 Vieira de Leiria

In Vieira de Leiria in September, the precipitation amount is 28 mm (1.1 in) over the course of 3 days.

September Precipitation Trends in Vieira de Leiria

The chart displays monthly precipitation patterns in Vieira de Leiria, 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 Vieira de Leiria, September typically receives around 28 mm (1.1 inches) of precipitation spread over approximately 3 days.
JanFebMarAprMayJunJulAugSepOctNovDec6071971015526109288211294
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Vieira de Leiria

In Vieira de Leiria in September humidity is 67%. With an average temperature of 19°C (66°F), this humidity feels like a warm embrace that envelops you as you travel, making each step a little heavier but still comfortable enough to explore the vibrant surroundings.

September Average Humidity in Vieira de Leiria

This chart illustrates the average monthly humidity levels in Vieira de Leiria, 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 Vieira de Leiria 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 Vieira de Leiria

In Vieira de Leiria 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 Vieira de Leiria.

Maximum UV Index Levels in Vieira de Leiria for September

The chart shows the monthly maximum UV Index (UVI) for Vieira de Leiria 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 Vieira de Leiria typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec35699111098643
Data source: Vieira de Leiria 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 Vieira de Leiria Compares to Other Months

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

This table compares monthly weather conditions in Vieira de Leiria, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather11°C (52°F)60 mm (2.4 inches)85%moderate
February Weather12°C (55°F)71 mm (2.8 inches)75%moderate
March Weather13°C (56°F)97 mm (3.8 inches)72%high
April Weather14°C (58°F)101 mm (4.0 inches)70%very high
May Weather16°C (62°F)54 mm (2.1 inches)70%very high
June Weather17°C (63°F)26 mm (1.0 inches)63%extreme
July Weather19°C (66°F)10 mm (0.4 inches)60%very high
August Weather19°C (66°F)9 mm (0.3 inches)60%very high
September Weather19°C (66°F)28 mm (1.1 inches)67%very high
October Weather17°C (63°F)82 mm (3.2 inches)74%high
November Weather14°C (58°F)112 mm (4.4 inches)83%moderate
December Weather13°C (55°F)94 mm (3.7 inches)85%moderate

Compare Vieira de Leiria's Climate with Cities Worldwide