nomadseason

September Weather in Leiria, Portugal

Last updated: August 27, 2025

In September, the average temperature in Leiria, Portugal hovers around 19°C (67°F). Expect lowest dips of 9°C (48°F) and peaks soaring to 35°C (95°F). During this month, the area typically sees 32 mm (1.3 in) of precipitation over 3 days, with an average humidity level of 67%.

September Temperature in Leiria

In September in Leiria, the average temperature is 19°C (67°F), with maximums reaching up to 35°C (95°F) and minimums dropping as low as 9°C (48°F). It's advisable to pack layers and prepare for both warm days and cooler nights while traveling.

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

The chart illustrates September temperature patterns in Leiria, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Leiria, September typically has an average temperature of 19°C (67°F), with highs reaching up to 35°C (95°F) and lows dropping to around 9°C (48°F).
JanFebMarAprMayJunJulAugSepOctNovDec495355576365686867625552
Data source: Temperature data for Leiria generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Leiria

In Leiria in September, the total precipitation amount is 32 mm (1.3 in) over a span of 3 days.

September Precipitation Trends in Leiria

The chart displays monthly precipitation patterns in 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 Leiria, September typically receives around 32 mm (1.3 inches) of precipitation spread over approximately 3 days.
JanFebMarAprMayJunJulAugSepOctNovDec5267100105522476337810683
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

September Humidity in Leiria

In Leiria in September, humidity is 67%. With an average temperature of 19°C (67°F), this humidity feels like walking through a warm, soft blanket, making sightseeing and outdoor activities a bit more challenging but still enjoyable for those prepared with light clothing and plenty of hydration.

September Average Humidity in Leiria

This chart illustrates the average monthly humidity levels in 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 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 Leiria

In 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 Leiria.

Maximum UV Index Levels in Leiria for September

The chart shows the monthly maximum UV Index (UVI) for 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 Leiria typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec346910111098643
Data source: 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 Leiria Compares to Other Months

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

This table compares monthly weather conditions in Leiria, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather9°C (49°F)52 mm (2.1 inches)85%moderate
February Weather12°C (53°F)67 mm (2.6 inches)75%moderate
March Weather13°C (55°F)100 mm (4.0 inches)72%high
April Weather14°C (58°F)105 mm (4.1 inches)70%very high
May Weather17°C (63°F)52 mm (2.0 inches)70%very high
June Weather18°C (65°F)24 mm (0.9 inches)63%extreme
July Weather20°C (68°F)7 mm (0.3 inches)60%very high
August Weather20°C (68°F)6 mm (0.2 inches)60%very high
September Weather19°C (67°F)32 mm (1.3 inches)67%very high
October Weather17°C (63°F)78 mm (3.1 inches)74%high
November Weather13°C (56°F)106 mm (4.2 inches)83%moderate
December Weather11°C (53°F)83 mm (3.3 inches)85%moderate

Compare Leiria's Climate with Cities Worldwide