Last updated: February 24, 2025
August in Porto, Portugal presents a delightful summer experience, characterized by warm temperatures that can peak at a sizzling 36°C (98°F) while maintaining an enjoyable average of 21°C (70°F). The evenings cool down to a pleasant minimum of 12°C (54°F), providing a refreshing respite. Although the month sees minimal rainfall with just 19 mm (0.7 in) across approximately 4 days, the humidity level hovers around 64%, adding a touch of warmth to the coastal atmosphere. Embrace the vibrant summer days and enchanting evenings that make August a perfect time to explore the beauty of Porto!
In August, Porto experiences its warmest temperatures of the year, showcasing a striking blend of sun and warmth that entices visitors to explore the vibrant city. With a minimum temperature of 12°C (54°F) and an average of 21°C (70°F), the evenings remain pleasant for leisurely strolls along the Douro River. Daytime temperatures can soar up to a scorching 36°C (98°F), making it the perfect month for beach outings and outdoor adventures. This enduring summer warmth invites locals and tourists alike to savor Porto's rich culture, delectable cuisine, and stunning architecture under the sunny skies. As the summer begins to wane, temperatures gradually decline in September, but the vibrant energy of August lingers on in the lively streets.
August in Porto, Portugal, marks a notable shift towards drier days, with precipitation plummeting to just 19 mm (0.7 in)—one of the lowest monthly totals of the year. The city typically experiences only four days of rain, reflecting a sunny reprieve, perfect for embracing outdoor activities. This trend of diminishing rainfall continues from the previous month, July, which also featured minimal precipitation at 23 mm (0.9 in). As summer reaches its zenith, the favorable weather not only enhances the city's charm but also sets the stage for the vibrant cultural events that characterize Porto during this season. With September on the horizon, the pattern indicates a gradual increase in rainfall, inviting a fresh shift in the local climate.
In August, Porto experiences a moderate humidity level of 64%, marking a subtle departure from the peak summer months. This slight increase in humidity from July's 63% signals the transition towards late summer, offering a more comfortable atmosphere for outdoor activities. As the year progresses, a notable trend emerges: humidity levels generally fluctuate with the seasons, from a high of 87% in the chill of January and December to a refreshing low of 63% in the heat of July. Fortunately, the late summer months, including August and September, present a balanced climate, providing visitors with pleasant conditions before the autumn humidity rises once again.
In August, Porto, Portugal, experiences a very high UV Index of 9, indicating a strong potential for sunburn with a burn time of just 15 minutes. This trend follows a summer pattern where UV levels peak, reaching their maximum in June at 11 and gradually decreasing in September to 8. Notably, as the year progresses from the cooler months of January's low UV Index of 2 to the summer highs, sun safety becomes increasingly crucial. Residents and visitors are encouraged to protect themselves accordingly, especially during peak sun hours. For those planning outdoor activities, staying informed about local conditions is vital—explore more at Porto UV Index.
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August in Porto, Portugal, boasts an impressive 396 hours of sunshine, making it one of the sunniest months of the year, just slightly behind the peak of 427 hours in July. This summer month continues the upward trend of bright days, following a remarkable journey from 159 hours in January to the vibrant 405 hours of sunshine in May. As the city basks in warm sunlight, visitors can enjoy the perfect conditions for exploring its picturesque streets and stunning riverfront. Interestingly, as summer transitions to autumn, September still retains a generous 346 hours, although the gradual decline in daylight hours becomes apparent as the year progresses. Porto's sunshine pattern showcases a clear seasonal rhythm, rich with sunny days that beckon travelers to indulge in the beauty of this charming city.
In August, Porto, Portugal, enjoys a promising 64% chance of sunny weather, making it one of the sunniest months of the year. This delightful trend follows a gradual increase in sun exposure from the earlier months, with December's 34% chance of sunshine climbing steadily to 57% by July. The rise is particularly notable when comparing August to colder months like January and February, which hover at 42% and 17% respectively. As the summer reaches its peak, August stands out as a prime time for visitors eager to soak up the sun, surrounded by the vibrant culture and stunning landscapes that Porto has to offer.
In August, Porto, Portugal basks in an average of 13 hours of daylight, maintaining a lively summer ambiance. This duration reflects a gradual decline from the longest day of June, which boasts 15 hours of bright sunshine, and it’s familiar for visitors to embrace the city's vibrant atmosphere during this time. As the month progresses into September, daylight starts to wane, with the hours tapering to 12. The overall trend from January’s 9 hours of daylight to August’s warm glow reveals a steady increase in sunlight, peaking in the summer, before transitioning back into shorter days as autumn approaches. Whether you're exploring the city’s rich history or enjoying its stunning coastal views, the generous daylight in August offers the perfect backdrop for unforgettable experiences.
In August, Porto, Portugal experiences a gentle breeze with an average wind speed of 2.7 m/s (6 mph), mirroring the tranquil coastal vibe of summer. This month typically showcases a slight decrease compared to the preceding summer months of June and July, which each enjoy a stable wind speed around 3.2 m/s (7 mph). Following this brief peak, the winds remain relatively consistent as September approaches, with a marginal uptick to 2.8 m/s (6 mph). Overall, August's wind is indicative of a season winding down, where mild breezes complement the sun-soaked days, inviting both locals and visitors to relish the last warm moments of summer along the picturesque coastline.
The weather in Porto 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 Porto and find detailed weather information for every month.
August and January present contrasting weather conditions. In August, temperatures range from a comfortable minimum of 12°C (54°F) to a warm maximum of 36°C (98°F), with an average of 21°C (70°F). The month is relatively dry, receiving only 19 mm (0.7 in) of precipitation over about four days and featuring a humidity level of 64%. In stark contrast, January experiences much cooler temperatures, with a minimum of 0°C (32°F), an average of 9°C (49°F), and a maximum of 21°C (69°F). This winter month sees significantly more rain, totaling 91 mm (3.6 in) over eight days, accompanied by a higher humidity of 87%. For more details on the January climate, check out Porto weather in January.
When comparing the weather in August and February, notable differences emerge. August features a warmer climate, with temperatures ranging from a minimum of 12°C (54°F) to a maximum of 36°C (98°F) and an average of 21°C (70°F). It experiences relatively low precipitation, totaling 19 mm (0.7 in) over just 4 days, and humidity levels hover around 64%. In contrast, February is significantly cooler, with temperatures ranging from a chilly 1°C (34°F) to a pleasant maximum of 21°C (71°F) and an average of 11°C (52°F). This month sees much higher precipitation, with 138 mm (5.4 in) spread over 11 days, and humidity rises to 81%. For a more detailed look at February weather, you can visit Porto weather in February.
August and March present strikingly different weather patterns. In August, temperatures range from a mild 12°C (54°F) during the night to a scorching maximum of 36°C (98°F), with an average of 21°C (70°F). The month is relatively dry, with only 19 mm (0.7 in) of precipitation over just 4 days and a humidity level of 64%. In contrast, March is much cooler, with a temperature range from a low of 3°C (38°F) to a high of 26°C (79°F) and an average of 12°C (54°F). However, it is significantly wetter, receiving 141 mm (5.6 in) of rain over 11 days, alongside a higher humidity level of 78%. For more detailed information, check the complete overview here: Porto weather in March.
When comparing the weather in August and April, it’s clear that the two months present significantly different climates. August boasts warmer temperatures, with a minimum of 12°C (54°F) and a maximum of 36°C (98°F), while April sees a cooler range with a minimum of 4°C (40°F) and a maximum of 27°C (81°F). Additionally, August is relatively dry, receiving only 19 mm (0.7 in) of precipitation over about 4 days, whereas April is notably wetter, with 146 mm (5.7 in) of rain spread across 13 days. The humidity is also higher in April at 79%, compared to 64% in August, making April feel more humid and damp overall. For a more detailed look at the weather in April, you can check out Porto weather in April.
August and May exhibit distinct weather patterns that highlight the transition from spring to summer. In August, temperatures range from a minimum of 12°C (54°F) to a steamy maximum of 36°C (98°F), with an average of 21°C (70°F). The month sees relatively low precipitation, totaling 19 mm (0.7 in) over 4 days and a humidity level of 64%. In contrast, May experiences cooler temperatures, with a minimum of 6°C (43°F) and a maximum of 30°C (87°F), averaging 17°C (63°F). This month is considerably wetter, with 81 mm (3.2 in) of rainfall over 9 days and higher humidity at 78%. For more details on the weather in May, you can visit Porto weather in May.
The weather in August is typically warmer than in June, with average temperatures reaching around 21°C (70°F) compared to June's 18°C (66°F). August can see maximum temperatures soar to 36°C (98°F), significantly higher than June's peak of 32°C (90°F). However, August experiences less precipitation, with only 19 mm (0.7 in) over four days, while June has a considerably wetter profile, with 50 mm (2.0 in) falling over eight days. Additionally, humidity levels are slightly higher in June at 71%, compared to August's 64%. For a detailed look at June's weather, check Porto weather in June.
In comparing the weather in August to that of July, we observe a slight increase in both maximum temperature and overall warmth. August boasts a maximum temperature of 36°C (98°F), surpassing July's peak of 34°C (94°F). Both months share similar average temperatures at 21°C (70°F), with August experiencing a minimum temperature of 12°C (54°F), marginally warmer than July's minimum of 11°C (52°F). Moreover, August enjoys slightly less precipitation, with only 19 mm (0.7 in) over four days compared to July's 23 mm (0.9 in) during the same number of rainy days. Humidity levels remain comparable, hovering around 64% in August and 63% in July. For a more detailed look at July’s weather specifics, check out Porto weather in July.
August and September exhibit notable differences in weather patterns. In August, temperatures range from a minimum of 12°C (54°F) to a maximum of 36°C (98°F), with an average of 21°C (70°F) and relatively low precipitation of 19 mm (0.7 in) over just 4 days. Conversely, September sees slightly cooler temperatures, with a minimum of 10°C (51°F) and a maximum of 34°C (94°F), resulting in an average of 20°C (68°F). Additionally, September experiences increased rainfall, totaling 39 mm (1.5 in) over 6 days, and a rise in humidity to 71%. For more detailed insights into September's weather, check out Porto weather in September.
August and October present quite distinct weather patterns. In August, temperatures are typically warmer, ranging from a minimum of 12°C (54°F) to a maximum of 36°C (98°F), with an average of 21°C (70°F). The precipitation is relatively low, with only 19 mm (0.7 in) falling over just four days, and humidity averages around 64%. In contrast, October sees cooler temperatures with a minimum of 6°C (44°F) and a maximum of 31°C (88°F), resulting in an average of 17°C (62°F). It also experiences significantly more rainfall, accumulating 121 mm (4.8 in) over ten days, and higher humidity at 79%. For a more detailed look at October's conditions, you can visit Porto weather in October.
In August, the weather is characterized by higher temperatures, with averages around 21°C (70°F) and maximums reaching up to 36°C (98°F), while November sees a significant drop in temperatures, averaging just 13°C (55°F) with maximums of 21°C (71°F). Additionally, precipitation levels differ dramatically; August experiences minimal rainfall of only 19 mm (0.7 in) over just 4 days, whereas November is much wetter, receiving 156 mm (6.1 in) of rain over 13 days. The humidity also increases from 64% in August to a notable 86% in November, contributing to a much different overall feel for the two months. For more detailed insights about the weather in November, visit Porto weather in November.
August and December present stark contrasts in weather. In August, temperatures range from a mild 12°C (54°F) at night to a sweltering maximum of 36°C (98°F) during the day, with an average of 21°C (70°F). Precipitation is minimal, totaling just 19 mm (0.7 in) over about four days, and the humidity sits at a comfortable 64%. In contrast, December experiences much cooler temperatures, with a minimum of 1°C (35°F) and an average of 11°C (52°F), peaking at 18°C (65°F). The month is significantly wetter, averaging 187 mm (7.4 in) of rain spread out over 15 days, and humidity rises to 87%. For an in-depth look at December weather, check out Porto weather in December.
August in Porto boasts warm temperatures and relatively low humidity, creating ideal conditions for outdoor activities and exploration. With average highs reaching around 21°C, the month stands out from the cooler ones, offering plenty of sunny days, while occasional rain showers are manageable with only about four days of precipitation. Visitors can enjoy long, luminous evenings that linger well past sunset, making August a delightful time to experience the city's vibrant culture. For more detailed insights on the weather dynamics throughout the year, check out Porto Climate.