August Weather in Sintra, Portugal

Last updated: February 24, 2025

August in Sintra, Portugal is characterized by a delightful blend of mild temperatures and refreshing breezes, making it an ideal time to explore this enchanting destination. With maximum temperatures reaching 23°C (74°F) and an average of 18°C (65°F), visitors can enjoy comfortable days. Nights cool down to a pleasant 16°C (61°F), perfect for evening strolls. The month sees minimal rainfall, with only 4 mm (0.1 in) of precipitation on just one day, allowing ample opportunity for outdoor adventures. The air remains moderately humid at 60%, adding to the charm of this picturesque locale.

August Temperature in Sintra

In August, Sintra embraces the warmth of summer, with temperatures gently rising as the month unfolds. The minimum temperature stands at a comfortable 16°C (61°F), allowing for pleasant evenings, while daytime highs reach an inviting 23°C (74°F). With an average temperature of 18°C (65°F), August strikes a perfect balance, making it ideal for exploring Sintra's stunning palaces and lush landscapes. This month marks the peak of summer warmth in Sintra, a delightful transition from the milder weather of earlier months, as visitors enjoy longer days under sunny skies while still benefiting from the refreshing breezes that Sintra is known for.

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

The chart illustrates August temperature patterns in Sintra, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec555657586163646465646058
Data source: Temperature data for Sintra 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 Sintra

August in Sintra, Portugal, presents a striking contrast to the wetter months preceding it, with a mere 4 mm (0.1 in) of precipitation falling over just 1 day. This significant drop signals the peak of summer, where sunshine prevails and outdoor activities thrive. Compared to the 64 mm in March and 71 mm in April, August stands out as the driest month, encapsulating the region's transitional climate. The minimal rainfall sets the stage for the vibrant colors and lush landscapes of autumn that follow, as September sees a rise once again with 32 mm of rain. This pattern illustrates a clear trend of dry summers, making Sintra an ideal summer destination for sun-seekers and nature lovers alike.

August Precipitation Trends in Sintra

The chart displays monthly precipitation patterns in Sintra, 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.
JanFebMarAprMayJunJulAugSepOctNovDec4259647133123432538973
Data source: Precipitation data for August generated using information from the Copernicus Climate Change Service.
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August Humidity in Sintra

In August, Sintra, Portugal, experiences a continuation of the summer’s pleasant climate with humidity hovering around 60%. This represents a notable decrease from the peak levels seen in the winter months, where humidity often reaches 85% in January and 83% in November. As the summer progresses, we observe a gradual drop in humidity, from 75% in February to its lowest point in August. Interestingly, this trend of lower humidity persists into September, rising slightly to 67%, yet remaining significantly more comfortable than the winter months. Overall, August stands out as one of the driest months, allowing residents and visitors to enjoy Sintra's beautiful scenery without feeling overwhelmed by moisture in the air.

August Average Humidity in Sintra

This chart illustrates the average monthly humidity levels in Sintra, with August's data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, allowing you to see how August's humidity levels compare to other months.
JanFebMarAprMayJunJulAugSepOctNovDec85%75%72%70%70%63%60%60%68%74%83%85%
Data source: Humidity data for August generated using information from the Copernicus Climate Change Service.

August UV Index in Sintra

In August, Sintra, Portugal experiences a very high UV Index of 9, indicating a heightened risk of harm from unprotected sun exposure. With a recommended burn time of just 15 minutes, it's crucial to take precautions, such as wearing sunscreen and protective clothing, especially during peak hours. This month's UV levels are slightly reduced compared to the extreme conditions of June but remain consistent with the high levels seen in July and earlier in April and May. Overall, the trend shows a peak in UV exposure during the summer months, highlighting the importance of sun safety during this time. For more details, visit Sintra UV Index.

Maximum UV Index Levels in Sintra for August

The chart shows the monthly maximum UV Index (UVI) for Sintra 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.
JanFebMarAprMayJunJulAugSepOctNovDec356910111098643
Data source: Sintra 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.

August Sunshine in Sintra

In August, Sintra, Portugal, basks in a delightful embrace of sunshine, boasting 395 hours of radiant light. This month, while slightly below the peak of July's 420 hours, continues a trend of warmth that blossoms from the earlier summer months. The sunshine steadily increases from January's modest 183 hours, culminating in May and June, where daylight roughly exceeds 400 hours, creating the perfect backdrop for exploring Sintra's charm. As autumn approaches, daylight gradually wanes, with September and October offering a gentle decline, yet August remains a vibrant highlight in Sintra's sun-filled calendar, inviting travelers to revel in the idyllic summer ambiance.

Monthly Sunshine Duration in Sintra: August Highlighted

The August sunshine duration represents the total number of hours Sintra experiences direct sunlight during the month of August, excluding cloudy or obstructed periods. This chart compares the sunshine duration of August with the other months of the year.
JanFebMarAprMayJunJulAugSepOctNovDec183h231h307h351h405h409h420h395h348h313h236h224h
Data source: Sintra August Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Sintra During August

In Sintra, Portugal, August enjoys a promising 66% chance of sunny weather, making it one of the best months to bask in the sun. This remains consistent with the trends observed in July and September, both also boasting a 66% chance of sunny days. Notably, the summer months from June to August show an upward trajectory in sunshine probability, peaking in July at 69%. As the summer wanes into September, the likelihood of clear skies remains unchanged, offering a delightful extension of the summer warmth. Overall, visitors can expect a reliable dose of sun during this period, perfect for exploring Sintra's stunning landscapes and historic sites.

Percentage of Sunny Days in August in Sintra

The chart illustrates the percentage of sunny days in Sintra throughout the year, with August highlighted. It highlights the variation in sunshine across each month and provides an overview of the typical frequency of sunny days, offering insights into how often Sintra experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec45%24%60%41%57%65%69%66%66%55%65%39%
Data source: Sintra August chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Sintra in August

As summer fades in Sintra, Portugal, August witnesses a gentle decline in daylight, offering 13 hours of radiant sunshine. This marks a slight reduction from the peak summer months of June and July, which bask in a full 14 hours of daylight. The trend showcases a gradual transition towards autumn, beginning with the longer days of spring and steadily tapering off as the year progresses. With August still graced by ample light, it remains an ideal time for outdoor adventures and enjoying the captivating landscapes, before the daylight dwindles to 12 hours in September, heralding the onset of the fall season.

Average Daylight Hours in Sintra for August

The chart illustrates the variation in daylight duration in Sintra throughout the year, with August highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec9h 46m10h 44m11h 58m13h 14m14h 17m14h 49m14h 32m13h 36m12h 23m11h 8m10h 2m9h 28m
Data source: Sintra daylight hours, calculated by summing the hours between sunrise and sunset for each day.

August Winds in Sintra

In August, Sintra, Portugal, enjoys a gently whispering breeze with an average wind speed of 6.4 m/s (14 mph), offering a pleasant respite from the summer heat. This marks a slight decrease from the blustery summer months of May (7.3 m/s) and July (7.2 m/s), illustrating a transition into the softer winds of early autumn. As we move towards September, the wind continues to mellow, dropping to an average of 5.4 m/s (12 mph), while still maintaining a refreshing touch. Overall, the trend shows that while Sintra experiences brisk winds during the early summer, August provides a harmonious balance that invites both relaxation and exploration, making it an ideal time to enjoy the area's enchanting landscapes.

Average August Wind Speed in Sintra

The chart displays monthly wind speed patterns in Sintra, with values for each month shown alongside August's data, which is highlighted for easy comparison. It illustrates the average wind speed, offering insights into how August's wind conditions compare to the rest of the year.
JanFebMarAprMayJunJulAugSepOctNovDec6.96.96.04.97.37.37.26.4 m/s5.45.16.56.7
Data source: Sintra August wind data, generated using information from the Copernicus Climate Change Service.

How August Weather in Sintra Compares to Other Months

The weather in Sintra changes throughout the year, offering a unique experience in each season. Below is a month-by-month comparison of August's weather with other months, highlighting differences in temperature, precipitation, and other key factors. Click on each section to discover seasonal trends in Sintra and find detailed weather information for every month.

August weather in Sintra is typically mild, with average temperatures ranging from a minimum of 16°C (61°F) to a maximum of 23°C (74°F). With only 4 mm (0.1 in) of precipitation across just one day, humidity remains at a comfortable 60%. In contrast, January brings cooler temperatures, averaging between 7°C (45°F) and 18°C (64°F), with a higher average rainfall of 42 mm (1.7 in) spread over seven days. The increase in humidity to 85% also contributes to a distinctly chillier feel. For more details on January's weather, you can visit Sintra weather in January.

August and February present contrasting weather patterns. In August, temperatures tend to be milder, with a minimum of 16°C (61°F), an average of 18°C (65°F), and a maximum of 23°C (74°F). The month is relatively dry, seeing only 4 mm of precipitation over just one day and a humidity level around 60%. In stark contrast, February experiences cooler temperatures, with a minimum of 9°C (48°F), an average of 13°C (56°F), and a maximum of 17°C (63°F). Precipitation is significantly higher during this month, totaling 59 mm over 8 days, alongside increased humidity at 75%. For those looking to explore Sintra's weather specifics in February, more information can be found at Sintra weather in February.

August weather in Sintra is generally mild, with temperatures ranging from a minimum of 16°C (61°F) to a maximum of 23°C (74°F), and it experiences relatively low precipitation, averaging only 4 mm (0.1 in) over just one day. In contrast, March brings cooler temperatures, with a minimum of 9°C (49°F) and a maximum of 19°C (66°F), as well as significantly higher precipitation, averaging 64 mm (2.5 in) over eight days. Additionally, March tends to have higher humidity levels at 72%, compared to August's 60%. For more detailed information, you can check Sintra weather in March.

August weather tends to be milder and drier compared to April. With minimum temperatures around 16°C (61°F) and an average of 18°C (65°F), August enjoys a maximum of 23°C (74°F) and only 4 mm of precipitation over just 1 day. In contrast, April experiences cooler temperatures, ranging from a minimum of 10°C (50°F) to a maximum of 21°C (71°F), accompanied by significantly higher precipitation of 71 mm (2.8 in) spread across 11 days. Additionally, April has a higher humidity level at 70%, compared to August's 60%. For more details on the weather conditions in April, visit Sintra weather in April.

In comparing the weather between August and May, we see notable differences in temperature and precipitation patterns. August boasts a milder range with temperatures averaging 18°C (65°F), peaking at a maximum of 23°C (74°F) and minimal precipitation of just 4 mm over the course of only one day. In contrast, May experiences slightly cooler temperatures with an average of 16°C (61°F) and a maximum of 24°C (76°F), but it compensates for this with higher precipitation levels of 33 mm over three days. Additionally, humidity is more pronounced in May at 70%, compared to August’s 60%. For more specific information regarding May conditions, check out Sintra weather in May.

In comparing the weather between June and August, August tends to be slightly warmer, with average temperatures reaching 18°C (65°F) compared to June's 17°C (63°F). The maximum temperature in August is also a bit higher at 23°C (74°F), while June peaks at 22°C (72°F). Regarding precipitation, August experiences less rain, with only 4 mm (0.1 in) on just 1 day, whereas June sees 12 mm (0.5 in) spread across 2 days. Humidity levels are quite similar, with August at 60% and June at 63%. For more detailed insights into the weather in June, you can refer to Sintra weather in June.

In comparing the weather between July and August, we see some subtle differences. Both months share similar minimum temperatures, with July at 16°C (60°F) and August also at 16°C (61°F). However, August experiences slightly warmer conditions with an average of 18°C (65°F) and a maximum of 23°C (74°F), compared to July's average of 18°C (64°F) and a maximum of 21°C (70°F). Precipitation is minimal in both months, with July receiving only 3 mm over no days and August seeing a bit more at 4 mm over just one day. Humidity remains consistent at 60% for both months, contributing to a generally mild climate. For more details on July weather, you can refer to this link: Sintra weather in July.

August and September share similar average temperatures, ranging from a minimum of 15-16°C (60-61°F) to a maximum of 23°C (74°F). However, September tends to be wetter, with precipitation increasing significantly to 32 mm (1.2 in) over 2 days, compared to just 4 mm (0.1 in) on a single day in August. Additionally, September experiences slightly higher humidity at 67%, up from August's 60%. For more detailed information, you can check Sintra weather in September.

In August, the weather boasts pleasant temperatures, with a minimum of 16°C (61°F), an average of 18°C (65°F), and a maximum of 23°C (74°F). Precipitation is minimal, with just 4 mm (0.1 in) falling over only one day, and humidity is around 60%. In contrast, October sees a cooler minimum temperature of 11°C (52°F), while still maintaining an average of 18°C (64°F) and a maximum of 23°C (74°F). However, this month experiences significantly higher precipitation, totaling 53 mm (2.1 in) across six days, and humidity rises to 74%. For a more detailed comparison, check Sintra weather in October.

August and November present contrasting weather conditions. In August, temperatures range from a minimum of 16°C (61°F) to a maximum of 23°C (74°F), with an average of 18°C (65°F). The month is relatively dry, with only 4 mm of precipitation over just 1 day and a humidity level of 60%. In contrast, November sees a drop in temperatures, with a minimum of 11°C (53°F) and a maximum of 20°C (68°F), averaging at 16°C (60°F). This month is considerably wetter, receiving 89 mm of precipitation over 11 days and experiencing higher humidity at 83%. For more details, you can check Sintra weather in November.

In August, the weather is generally mild with temperatures ranging from a minimum of 16°C (61°F) to a maximum of 23°C (74°F) and an average of 18°C (65°F). There is minimal precipitation, averaging only 4 mm (0.1 in) across just one day, coupled with a moderate humidity level of 60%. In contrast, December experiences considerably cooler temperatures, with a minimum of 9°C (49°F) and a maximum of 17°C (63°F), averaging around 14°C (58°F). The month also sees significantly more rainfall, totaling 73 mm (2.9 in) over about 10 days, and a higher humidity of 85%. For more insights into the winter climate, check out Sintra weather in December.

Compare Sintra's Climate with Cities Worldwide

Conclusion: What to Expect From August Weather in Sintra

August in Sintra offers a delightful blend of warmth and mildness, setting it apart from the typically cooler months. With average temperatures around 18°C (65°F), the region enjoys a pleasant atmosphere, complemented by minimal rainfall—only 4 mm across a mere day or so. This month sees relative humidity around 60%, creating a comfortable environment for visitors exploring the enchanting landscapes. Overall, August proves to be an ideal time to experience the vibrant beauty of Sintra, making it a memorable getaway. For more insights on Sintra's weather patterns, visit Sintra Climate.