Last updated: August 21, 2025
In August, Porto Alegre, Brazil experiences a diverse range of temperatures, with maximums soaring up to 34°C (94°F) and minimums dropping as low as 3°C (38°F). The month showcases an average temperature of 16°C (61°F), offering a pleasant escape from the sweltering heat of summer. While humidity levels maintain a relatively high 81%, residents and visitors can expect an average precipitation amount of 70 mm (2.8 in) over approximately 8 rainy days. This combination of warmth and occasional showers makes August a unique time to enjoy the vibrant culture and lush landscapes of Porto Alegre.
In August, Porto Alegre experiences a shift as winter begins to wane, with temperatures ranging from a chilly 3°C (38°F) at night to a more pleasant 34°C (94°F) during the day. The average temperature hovers around 16°C (61°F), providing a respite from the coldest months of July and June. As the city transitions into spring, daily highs start to inch upwards, hinting at the warmer months ahead. This moderate climate invites both locals and visitors to enjoy the outdoors, making it an ideal time for exploring the vibrant culture and picturesque landscapes of the region.
August in Porto Alegre sees a moderate dip in precipitation, with 70 mm (2.8 in) of rain spread across 8 days. This marks a decrease compared to the wetter months of May and July, which feature higher averages of 153 mm (6.0 in) and 122 mm (4.8 in) respectively. However, August's rainfall still contributes to the overall trend of increasing moisture as the year progresses, leading into the notably rainy September, where 155 mm (6.1 in) is recorded. This gradual rise in precipitation leading into the spring months provides a transitional comfort before the city braces for heavier rains.
In August, the humidity in Porto Alegre hovers around a comfortable 81%, marking a slight decline from the peak of 87% experienced in May. This summer month continues the trend of higher humidity levels typical of the Brazilian climate, which peaks in the early and mid-year with January through April averaging above 79%. Following August, humidity begins to climb again as the year transitions into the warmer months. Overall, while August maintains a relatively high humidity level, it signals the start of a gradual shift toward drier conditions leading into the more humid spring months ahead, with September and October both averaging above 84%.
In August, Porto Alegre experiences a UV Index of 7, which falls into the high exposure category, indicating a burn time of approximately 25 minutes. This month marks a shift from the more extreme values seen earlier in the year; January's index peaks at a striking 14, necessitating just 10 minutes of exposure to risk sunburn. As the seasons transition, the UV Index gradually declines, hitting a moderate level during the winter months of June and July, before climbing back up in August. As such, residents and visitors should remain vigilant about sun protection, as even in high exposure, spending extended time outdoors can still lead to skin damage. For more detailed insights, check out Porto Alegre UV Index.
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August in Porto Alegre, Brazil, brings a delightful 257 hours of sunshine, marking a warm mid-point in the city's vibrant summer season. As winter fades away, residents and visitors alike can relish in the increasing daylight, which is a noticeable uptick compared to the cooler months of June and July. The sun-soaked days of August pave the way for an even brighter transition into spring, setting the stage for the peak sunshine in November and December. The trend of gradually increasing sunlight from the colder months underscores Porto Alegre’s progressive shift towards warmth and brightness, making August a charming time to enjoy the outdoors and embrace the city's lively atmosphere.
In Porto Alegre, Brazil, the likelihood of enjoying sunny weather in August hovers around 40%, which is on par with the previous month, July, known for its 60% chance of sun. The pattern reveals a notable dip in sunshine during the winter months, with June taking the lowest spot at 32%. As the region transitions into spring, the chances of clear skies pick up again, with September and October showing a further decline to 30%, but rising to a more favorable 48% in October. This fluctuation reflects a seasonal rhythm, indicating that while August may not be the sunniest month, it still holds potential for bright days amidst the cooler winter transition.
In August, Porto Alegre enjoys a moderate 11 hours of daylight, making it a month of gradual transition towards longer days. Following the cooler, shorter days of June and July, August signals the slow return of sunlight as daylight extends from 10 hours to 11 hours. This increase sets the tone for the upcoming spring months, with daylight continuing to lengthen in September. The cyclical pattern of daylight hours showcases the region's shift from the winter chill towards the warmer and brighter months ahead, inviting residents and visitors alike to embrace the beauty of the changing seasons.
In August, Porto Alegre experiences a gentle breath of wind, with an average speed of 2.9 m/s (6 mph). This slight increase from the cooler months of June and July signals a transition in the region's weather patterns. The winds remain relatively calm, echoing the subdued ambiance typical of late winter. As the city edges toward the warmer spring months, a noticeable uptick in wind speeds can be observed in September and October, where averages rise to 3.3 m/s (7 mph). This gradual shift in wind dynamics hints at the approaching seasonal change, inviting residents to enjoy the crisp air of August while anticipating the invigorating breezes that herald spring.
Weather in Porto Alegre varies notably across the year, with each month offering distinct climate conditions. This page compares August’s weather to other months in Porto Alegre, focusing on differences in temperature, rainfall, humidity, and UV levels.
August and January in Porto Alegre present notably different weather patterns. In August, temperatures range from a minimum of 3°C (38°F) to a maximum of 34°C (94°F), with an average of 16°C (61°F), and the month sees 70 mm (2.8 in) of precipitation over about 8 days, coupled with high humidity at 81%. In contrast, January experiences warmer conditions, with temperatures ranging from a minimum of 15°C (58°F) to a peak of 39°C (103°F) and an average of 26°C (79°F). Precipitation increases to 93 mm (3.7 in) over approximately 12 days, while humidity remains slightly lower at 77%. For more detailed information, you can visit Porto Alegre weather in January.
In comparing the weather of August and February, August tends to be cooler with temperatures ranging from a minimum of 3°C (38°F) to a maximum of 34°C (94°F) and an average of 16°C (61°F). This month sees about 70 mm (2.8 in) of precipitation over approximately 8 days and has a higher humidity of 81%.
In contrast, February experiences significantly warmer temperatures, with a minimum of 14°C (58°F), an average of 25°C (77°F), and a peak of 38°C (100°F). This month also has increased rainfall, with 112 mm (4.4 in) of precipitation occurring over around 11 days and slightly lower humidity at 79%.
For more detailed insights on February weather in this region, visit Porto Alegre weather in February.
When comparing the weather in August and March, notable differences emerge in temperature and precipitation. August experiences milder temperatures with a minimum of 3°C (38°F) and an average of 16°C (61°F), peaking at 34°C (94°F). In contrast, March boasts warmer temperatures, starting at a minimum of 13°C (56°F) and averaging 23°C (75°F), with highs reaching up to 38°C (100°F). Precipitation levels are also higher in March, with 109 mm (4.3 in) falling over 12 days compared to August's 70 mm (2.8 in) over 8 days. Despite the slight difference in humidity, with August at 81% and March at 79%, March tends to feel more humid due to higher temperatures. For a detailed look at the March weather specifics, you can check Porto Alegre weather in March.
When comparing the weather in August and April, notable differences in temperatures emerge. August tends to start cooler with a minimum of 3°C (38°F), though it can peak at a warm 34°C (94°F), leading to an average temperature of 16°C (61°F). In contrast, April has a milder minimum temperature of 8°C (47°F) and averages a warmer 21°C (71°F), while also reaching a similar maximum of 34°C (93°F). Both months experience comparable levels of precipitation, with August receiving 70 mm (2.8 in) and April just slightly more at 73 mm (2.9 in), both occurring over about eight days. Moreover, humidity levels are quite similar, with August at 81% and April slightly higher at 82%. For more detailed information, you can check out the Porto Alegre weather in April.
When comparing the weather in August and May, several notable differences emerge. August typically experiences a broader temperature range, with minimums of 3°C (38°F) and maximums reaching 34°C (94°F), resulting in an average temperature of 16°C (61°F). In contrast, May has slightly warmer average temperatures, ranging from a minimum of 5°C (41°F) to a maximum of 32°C (90°F), averaging 17°C (63°F). Precipitation levels in May are significantly higher at 153 mm (6.0 in) over 10 days, compared to August’s 70 mm (2.8 in) over 8 days. Additionally, May has a slightly higher humidity level at 87%, versus August's 81%. For more detailed insights on May weather specifics, you can visit Porto Alegre weather in May.
When comparing the weather in August and June, we observe that both months share similar minimum temperatures of 3°C (38°F) and average temperatures around 16°C (61°F). However, August tends to be slightly warmer with a maximum temperature of 34°C (94°F) compared to June's maximum of 31°C (88°F). Precipitation levels are notably different, as June experiences more rainfall at 113 mm (4.4 in) over 9 days, while August sees less with 70 mm (2.8 in) over 8 days. Humidity is also marginally lower in August at 81%, compared to 85% in June. For more details, check out Porto Alegre weather in June.
In comparing the weather of August and July, August tends to be slightly warmer, with average temperatures reaching 16°C (61°F) compared to July's 14°C (58°F). The maximum temperatures in August also peak higher at 34°C (94°F) versus July's 30°C (87°F). However, August experiences less precipitation, recording 70 mm (2.8 in) over 8 days, unlike July, which sees a higher total of 122 mm (4.8 in) during the same number of days. Despite this difference, humidity remains fairly consistent, with August at 81% and July at 82%. For more details, you can refer to Porto Alegre weather in July.
August and September in Porto Alegre showcase a transition in weather patterns. August typically sees a milder temperature range with minimums of 3°C (38°F) and maximums of 34°C (94°F), averaging around 16°C (61°F). During this month, precipitation measures 70 mm (2.8 in), occurring over 8 days, with a humidity level of 81%. In contrast, September brings slightly warmer conditions, with minimum temperatures rising to 7°C (45°F) and maximums increasing to 36°C (96°F), resulting in an average of 18°C (65°F). However, September also sees a significant increase in precipitation to 155 mm (6.1 in) over 12 days, accompanied by a marginal rise in humidity to 84%. For more detailed insights, check Porto Alegre weather in September.
August and October display notable differences in weather patterns. In August, temperatures fluctuate from a minimum of 3°C (38°F) to a maximum of 34°C (94°F), with an average temperature of 16°C (61°F). This month experiences 70 mm (2.8 in) of precipitation over approximately 8 days, coupled with a humidity level of 81%. On the other hand, October sees a rise in temperatures with a minimum of 9°C (49°F) and a maximum of 37°C (100°F), averaging at 20°C (68°F). Precipitation increases significantly to 139 mm (5.5 in) over 13 days, and humidity slightly rises to 85%. For a more detailed overview, check out Porto Alegre weather in October.
In comparing the weather between August and November, there are notable differences in temperature and precipitation. August typically sees temperatures ranging from a minimum of 3°C (38°F) to a maximum of 34°C (94°F), with an average of about 16°C (61°F). In contrast, November features a milder temperature range, with minimums of 12°C (53°F) and maximums reaching 37°C (99°F), averaging around 22°C (72°F). When it comes to precipitation, August receives about 70 mm (2.8 in) over approximately 8 days, while November experiences higher precipitation at 112 mm (4.4 in) across 10 days, contributing to its slightly higher humidity of 82%. For more detailed insights, you can check Porto Alegre weather in November.
In comparing the weather of August and December, August experiences a wide temperature range, with minimums around 3°C (38°F) and a maximum of 34°C (94°F), averaging at 16°C (61°F). In contrast, December sees a noticeably warmer climate, with minimums at 13°C (55°F) and maximums peaking at 38°C (101°F), averaging 24°C (76°F). Both months receive similar amounts of precipitation, around 70 mm (2.8 in) in August and slightly more in December at 80 mm (3.2 in), with rainfall occurring on about 8 days each month. Humidity levels remain fairly high in both months, with August at 81% and December slightly higher at 84%. For more details on December weather, you can check Porto Alegre weather in December.
August in Porto Alegre is characterized by a delightful transition, offering a unique blend of mild temperatures and increased humidity compared to the summer months. While maximum temperatures can soar to a warm 34°C (94°F), the overall climate remains enjoyable, with an average that lingers around 16°C (61°F), making it far more pleasant than the colder winter months. The rainfall, though present with about 70 mm over approximately eight days, contributes to the lush greenery, setting the stage for a vibrant spring. For those looking to explore the dynamic weather patterns, further details can be found at Porto Alegre Climate.