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August Weather in Seia, Portugal

Last updated: August 27, 2025

In August, the average temperature in Seia, Portugal is a pleasant 21°C (71°F). Expect temperatures to range from a cool 9°C (48°F) to a sizzling 38°C (100°F). With an average humidity of 64%, you can experience the warmth comfortably. However, be prepared for light rain, as the area receives about 17 mm (0.7 in) of precipitation over just 3 days.

August Temperature in Seia

In August in Seia, the average temperature is 21°C (71°F). Maximum temperatures can reach 38°C (100°F), while minimums can dip as low as 9°C (48°F). Be prepared for a wide range of temperatures during your travels!

August Weather in Seia: Daily Temperature Highs, Lows, and Averages

The chart illustrates August temperature patterns in Seia, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Seia, August typically has an average temperature of 21°C (71°F), with highs reaching up to 38°C (100°F) and lows dropping to around 9°C (48°F).
JanFebMarAprMayJunJulAugSepOctNovDec434850546064707066595046
Data source: Temperature data for Seia 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.

August Precipitation in Seia

In Seia in August, the precipitation amount is 17 mm (0.7 in) over the course of 3 days.

August Precipitation Trends in Seia

The chart displays monthly precipitation patterns in Seia, with values for each month alongside August’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how August’s conditions compare to those of other months. In Seia, August typically receives around 17 mm (0.7 inches) of precipitation spread over approximately 3 days.
JanFebMarAprMayJunJulAugSepOctNovDec68110133125563912174394132136
Data source: Precipitation data for August generated using information from the Copernicus Climate Change Service.
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August Humidity in Seia

In Seia in August, humidity is 64%. With an average temperature of 21°C (71°F), this humidity feels like a warm embrace, making it comfortable for traveling but with a slight stickiness in the air that calls for light, breathable clothing and plenty of hydration.

August Average Humidity in Seia

This chart illustrates the average monthly humidity levels in Seia, with August’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In August, average humidity in Seia is approximately 64%, 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 August generated using information from the Copernicus Climate Change Service.

August UV Index in Seia

In Seia in August, 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 Seia.

Maximum UV Index Levels in Seia for August

The chart shows the monthly maximum UV Index (UVI) for Seia in August, 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 August, the maximum UV index in Seia typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec346910111098643
Data source: Seia August 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 August Weather in Seia Compares to Other Months

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

This table compares monthly weather conditions in Seia, showing how August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather6°C (44°F)68 mm (2.7 inches)87%moderate
February Weather9°C (48°F)110 mm (4.3 inches)81%moderate
March Weather10°C (50°F)133 mm (5.2 inches)78%high
April Weather12°C (54°F)125 mm (4.9 inches)79%very high
May Weather16°C (61°F)56 mm (2.2 inches)78%very high
June Weather18°C (65°F)39 mm (1.5 inches)71%extreme
July Weather21°C (70°F)12 mm (0.5 inches)63%very high
August Weather21°C (71°F)17 mm (0.7 inches)64%very high
September Weather19°C (67°F)43 mm (1.7 inches)71%very high
October Weather15°C (59°F)94 mm (3.7 inches)79%high
November Weather10°C (50°F)132 mm (5.2 inches)86%moderate
December Weather8°C (47°F)136 mm (5.4 inches)87%moderate

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