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August Weather in Lisbon, United States

Last updated: June 24, 2025

In August, the average temperature in Lisbon, United States is a pleasant 22°C (72°F), with a minimum of 10°C (49°F) and a maximum reaching 33°C (92°F). Expect some rainfall, as precipitation averages 98 mm (3.9 in) over 13 days. You'll also experience a relatively high average humidity of 76%, making it a uniquely refreshing month!

August Temperature in Lisbon

In August in Lisbon, the average temperature is 22°C (72°F). Maximums can reach 33°C (92°F) and minimums can be as low as 10°C (49°F). This makes it an ideal destination for travelers seeking pleasant weather and a range of outdoor activities.

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

The chart illustrates August temperature patterns in Lisbon, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Lisbon, August typically has an average temperature of 22°C (72°F), with highs reaching up to 33°C (92°F) and lows dropping to around 10°C (49°F).
JanFebMarAprMayJunJulAugSepOctNovDec303340506270747267564135
Data source: Temperature data for Lisbon 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 Lisbon

In Lisbon in August, the precipitation amount is 98 mm (3.9 in) over a span of 13 days.

August Precipitation Trends in Lisbon

The chart displays monthly precipitation patterns in Lisbon, 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 Lisbon, August typically receives around 98 mm (3.9 inches) of precipitation spread over approximately 13 days.
JanFebMarAprMayJunJulAugSepOctNovDec91106101132130131133991151169496
Data source: Precipitation data for August generated using information from the Copernicus Climate Change Service.
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August Humidity in Lisbon

In Lisbon in August humidity is 76%. With an average temperature of 22°C (72°F), this humidity feels like a warm embrace, making travel slightly uncomfortable as you navigate through the thick, saturated air.

August Average Humidity in Lisbon

This chart illustrates the average monthly humidity levels in Lisbon, 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 Lisbon is approximately 76%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec89%88%87%87%81%83%82%76%77%82%89%86%
Data source: Humidity data for August generated using information from the Copernicus Climate Change Service.

August UV Index in Lisbon

In Lisbon 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 Lisbon.

Maximum UV Index Levels in Lisbon for August

The chart shows the monthly maximum UV Index (UVI) for Lisbon 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 Lisbon typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec356910101098642
Data source: Lisbon 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 Lisbon Compares to Other Months

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

This table compares monthly weather conditions in Lisbon, showing how August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-1°C (30°F)91 mm (3.6 inches)88%moderate
February Weather1°C (34°F)106 mm (4.2 inches)88%moderate
March Weather5°C (41°F)101 mm (4.0 inches)87%high
April Weather10°C (51°F)132 mm (5.2 inches)87%very high
May Weather16°C (62°F)130 mm (5.1 inches)81%very high
June Weather21°C (70°F)131 mm (5.2 inches)83%very high
July Weather24°C (75°F)133 mm (5.2 inches)82%very high
August Weather22°C (72°F)98 mm (3.9 inches)76%very high
September Weather19°C (67°F)114 mm (4.5 inches)77%very high
October Weather14°C (57°F)116 mm (4.6 inches)82%high
November Weather5°C (41°F)94 mm (3.7 inches)89%moderate
December Weather2°C (35°F)95 mm (3.8 inches)86%low

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