Last updated: August 21, 2025
In January, Porto Alegre experiences a blend of warm and humid conditions, with maximum temperatures soaring up to 39°C (103°F) and averaging around 26°C (79°F). The minimum temperature can drop to a comfortable 15°C (58°F) during the cooler evenings. This month is characterized by significant precipitation, totaling 93 mm (3.7 in) over approximately 12 days, contributing to the city's lush greenery. Elevated humidity levels at 77% add to the tropical ambiance, making January an inviting yet sultry time to explore this vibrant Brazilian city.
In January, Porto Alegre sizzles as temperatures soar, with minimums averaging around 15°C (58°F) and daytime highs peaking at a sweltering 39°C (103°F). The average temperature during this summer month hovers at a comfortable 26°C (79°F), making it a prime time for outdoor activities and enjoying the vibrant city life. As the month transitions into February, the heat remains consistent, but a slight dip is reflected in the overall averages. This trend of warm to hot temperatures continues through the summer, maintaining a rhythm of warmth that gradually cools as the year progresses into the brisk months of autumn. The stark contrast between January's heat and the chill of June, where temperatures can plummet to as low as 3°C (38°F), highlights the seasonal fluctuations typical of this region, offering a delightful variety for residents and visitors alike.
In January, Porto Alegre experiences an average precipitation of 93 mm (3.7 in) over approximately 12 days, marking the start of its summer season with a notable amount of rainfall. This marks a transition into a wetter pattern, as February sees an increase to 112 mm (4.4 in), making it one of the wetter months, while March remains similarly damp with 109 mm (4.3 in). Notably, May and September emerge as the rainiest months of the year, receiving 153 mm (6.0 in) and 155 mm (6.1 in) respectively, yet they manage to do so over fewer precipitation days, hinting at intense storms. On the other hand, the drier months, such as April and August, yield considerably less rainfall, averaging around 70-73 mm (2.8-2.9 in), with only 8 days of rain each. This pattern illustrates a clear seasonal shift where summer months tend to be more humid and rain-laden, while late autumn and winter months offer a respite from frequent downpours, culminating in a dynamic and varied climate throughout the year.
In January, Porto Alegre experiences a notable humidity level of 77%, setting the stage for the warm summer months ahead. As the year progresses, February and March maintain a consistent 79% humidity, contributing to a sticky atmosphere that characterizes the region's subtropical climate. However, as autumn approaches in April, humidity begins to rise steadily, peaking at 87% in May. This trend reflects a gradual transition into the cooler months, where June and July retain a high humidity of 85% and 82%, respectively. As spring emerges, August and September see a slight decline, yet humidity levels hover around 81% to 84%, indicating a persistent moisture presence throughout the year. The climate here not only influences daily life but also paints a vibrant portrait of Porto Alegre's enchanting weather patterns.
In January, Porto Alegre experiences a soaring UV Index of 14, putting it in the extreme exposure category, where the burn time is a mere 10 minutes. This intense UV radiation is a trend that persists into February, maintaining a similarly extreme index of 13. As summer progresses into March, the UV levels slightly dip to 12, but remain in the extreme zone, emphasizing the need for sun protection. The intensity begins to wane in April, with the UV Index dropping to 9, marking a shift to the very high exposure category and allowing for a slightly longer burn time of 15 minutes. As the months transition toward winter, UV levels gradually decrease, peaking again in October and November with indexes of 12 and 13 respectively, before closing the year back at 14 in December. For an in-depth understanding and updated information on UV radiation levels throughout the year, you can visit Porto Alegre UV Index.
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In January, Porto Alegre basks in an impressive 272 hours of sunshine, setting the tone for a vibrant summer month. As the year progresses into February and March, the city enjoys even more sun, with 310 and 312 hours, respectively, making these months some of the sunniest of the year. However, as autumn approaches in April, the sunlight begins to wane slightly, dropping to 271 hours. This trend continues into May and June, where the hours dip further to 230 and 220 hours, reflecting the cooler, cloudier weather of winter. By July, the city starts to see a modest recovery at 239 hours, but it isn't until late spring and into summer that Porto Alegre truly comes alive again, with November's incredible 316 hours and the year's peak in December at 361 hours. This fluctuation not only highlights the diverse climate of southern Brazil but also underscores the city's seasonal charm, inviting visitors to experience the sunny vibrancy of its summer days.
In Porto Alegre, Brazil, January typically sees a 43% chance of sunny weather, setting the stage for a month that balances warmth with occasional grey skies. As the year progresses, the likelihood of sunshine fluctuates, peaking in July at an impressive 60%. Following January, February stands out with a 59% chance of clear skies, signaling the height of summer's radiance. However, the sun's presence diminishes as winter approaches, with a noticeable drop in June to just 32%. Overall, January offers a promising start to the year, hinting at the vibrant summer days to come while contrasting with the chillier months that lie ahead.
In Porto Alegre, Brazil, January shines brightly with an impressive 13 hours of daylight, a vibrant start to the year that continues into February. As the seasons transition, daylight gently tapers to 12 hours in March and further declines to 11 hours by April. The trend stabilizes through the heart of winter, with 10 hours of daylight from May to July, before gradually increasing again. As spring approaches, daylight returns, reaching 11 hours in August and September. October welcomes a slight revival to 12 hours, and the year wraps up on a high note as November and December boast 13 and 14 hours of daylight, respectively. This rhythmic dance of daylight sets the perfect backdrop for Porto Alegre's seasonal experiences, inviting residents and visitors alike to savor each long day.
In January, Porto Alegre experiences a gentle breeze, with an average wind speed of 3.1 m/s (7 mph). This month marks the transition from the brisker winds of late spring to the lighter currents that characterize the summer heat. Following January, wind speeds slightly dip in February to 2.9 m/s, but maintain a similar feeling throughout the month. As the season progresses into March and April, the winds remain steady, both around 2.6–2.7 m/s (6 mph), embracing the city's vibrant summer atmosphere. Interestingly, the winds pick up again in June to an average of 3.2 m/s, creating a refreshing contrast to the warmer months. As the year wraps up, November and December bring in increasingly brisk winds, peaking at an invigorating 3.7 m/s (8 mph) in December, hinting at the upcoming seasonal changes. Overall, January sets the stage for a mild start to the year, with a trend toward both subtler and brisker breezes as summer transitions into autumn.
Weather in Porto Alegre varies notably across the year, with each month offering distinct climate conditions. This page compares January’s weather to other months in Porto Alegre, focusing on differences in temperature, rainfall, humidity, and UV levels.
January and February in Porto Alegre exhibit similar warm and humid conditions, but with slight variations. January boasts a bit more warmth, with average temperatures reaching 26°C (79°F) and highs of 39°C (103°F), while February sees a slight dip, averaging 25°C (77°F) and peaking at 38°C (100°F). Precipitation increases in February, with 112 mm (4.4 in) over 11 days compared to January's 93 mm (3.7 in) across 12 days. Additionally, both months experience high humidity, but February's average humidity is marginally higher at 79%, compared to January's 77%. For detailed weather insights, visit Porto Alegre weather in February.
In comparing the weather between January and March, we see some notable differences despite the similarity in conditions. January boasts a higher average temperature of 26°C (79°F) with maximums reaching up to 39°C (103°F), while March has a slightly cooler average of 23°C (75°F) and a max temperature of 38°C (100°F). Precipitation is a bit more pronounced in March, with 109 mm (4.3 in) over 12 days compared to January’s 93 mm (3.7 in) over the same number of days. Both months exhibit high humidity levels, with January at 77% and March slightly higher at 79%. For more detailed information, you can explore Porto Alegre weather in March.
In January, Porto Alegre experiences much warmer weather, with temperatures ranging from a minimum of 15°C (58°F) to a maximum of 39°C (103°F) and an average of 26°C (79°F). The humidity is relatively high at 77%, and the city receives significant rainfall, totaling 93 mm (3.7 in) over approximately 12 days. In contrast, April offers a cooler climate, with temperatures dropping to a minimum of 8°C (47°F) and peaking at 34°C (93°F), averaging around 21°C (71°F). The precipitation in April decreases to 73 mm (2.9 in) over 8 days, while humidity slightly increases to 82%. For more detailed information on this month's weather, check out Porto Alegre weather in April.
In January, Porto Alegre experiences warmer temperatures with a minimum of 15°C (58°F) and an average high of 39°C (103°F), accompanied by humidity levels around 77%. However, it also sees a fair amount of rainfall, with 93 mm (3.7 in) of precipitation spread over 12 days. In contrast, May brings cooler temperatures, with a minimum of 5°C (41°F) and an average maximum of 32°C (90°F). It experiences higher precipitation at 153 mm (6.0 in) over just 10 days, and humidity increases slightly to 87%. The shift from January's heat to May's cooler, wetter climate highlights the distinct seasonal variations in Porto Alegre. For more detailed information, you can check Porto Alegre weather in May.
In January, the weather in Porto Alegre is characterized by warm temperatures, with a minimum of 15°C (58°F) and an average max of 39°C (103°F), coupled with a relatively high humidity of 77%. The month sees about 93 mm (3.7 in) of precipitation over 12 days, making it a rather wet season. In contrast, June brings cooler conditions, with temperatures dropping to a minimum of 3°C (38°F) and an average of 16°C (60°F). Although June has a slightly higher precipitation total of 113 mm (4.4 in) over 9 days, the humidity increases to 85%. For a more detailed overview of Porto Alegre weather in June, visit Porto Alegre weather in June.
January and July present stark contrasts in weather conditions. In January, temperatures range from a minimum of 15°C (58°F) to a scorching maximum of 39°C (103°F), with an average of 26°C (79°F). This month typically sees about 93 mm (3.7 in) of precipitation over 12 days, alongside a humidity level of 77%. In contrast, July is significantly cooler, with temperatures varying from a chilly 2°C (35°F) to a maximum of 30°C (87°F) and an average temperature of only 14°C (58°F). The month experiences higher total precipitation of 122 mm (4.8 in), but over just 8 days, resulting in a humidity of 82%. For a deeper insight into the temperature and weather patterns, you can check Porto Alegre weather in July.
When comparing the weather in January and August, notable differences emerge in temperature and precipitation. January tends to be much warmer, featuring minimum temperatures of 15°C (58°F) and maximums reaching up to 39°C (103°F), with an average of 26°C (79°F). In contrast, August experiences cooler temperatures, with a minimum of 3°C (38°F) and a maximum of 34°C (94°F), and an average of only 16°C (61°F). Although January is wetter with 93 mm (3.7 in) of rainfall over 12 days, August also receives some precipitation, totaling 70 mm (2.8 in) across 8 days. Surprisingly, August has slightly higher humidity levels at 81% compared to January's 77%. For a more detailed look at the weather in August, you can visit Porto Alegre weather in August.
January and September in Porto Alegre present a stark contrast in weather conditions. January boasts significantly warmer temperatures, with minimums of 15°C (58°F) and maximums reaching up to 39°C (103°F). The humidity level in January averages 77%, along with 93 mm (3.7 in) of precipitation spread over 12 days. In contrast, September experiences much cooler temperatures, with minimums dropping to 7°C (45°F) and averages reaching 18°C (65°F). The month also sees increased precipitation, totaling 155 mm (6.1 in) over the same number of rainy days, and a slightly higher humidity level of 84%. For more detailed information, you can visit Porto Alegre weather in September.
January weather in Porto Alegre is characterized by higher temperatures, with minimums around 15°C (58°F), averaging 26°C (79°F), and soaring up to a maximum of 39°C (103°F). The month sees significant rainfall, accumulating 93 mm (3.7 in) over about 12 days, and maintaining a humidity level of 77%. In contrast, October experiences cooler temperatures, with a minimum of 9°C (49°F) and an average of 20°C (68°F), peaking at 37°C (100°F). Rainfall is more substantial in October, totaling 139 mm (5.5 in) over approximately 13 days, accompanied by a slightly higher humidity of 85%. For more details on October conditions, visit Porto Alegre weather in October.
In January, Porto Alegre experiences warmer temperatures with a minimum of 15°C (58°F) and an average high reaching up to 39°C (103°F). The month sees an average precipitation of 93 mm (3.7 in) across 12 days, combined with a humidity level of 77%. In contrast, November offers slightly cooler weather, with temperatures ranging from a minimum of 12°C (53°F) to a maximum of 37°C (99°F). Precipitation rises to 112 mm (4.4 in) over 10 days, and humidity is a bit higher at 82%. For more details on November conditions, visit Porto Alegre weather in November.
In comparing the weather between January and December, January tends to be slightly warmer, with average temperatures reaching around 26°C (79°F), while December's average hovers at 24°C (76°F). January also sees higher maximum temperatures, peaking at 39°C (103°F) compared to December's 38°C (101°F). Precipitation levels are relatively similar, with January experiencing 93 mm (3.7 in) over 12 days and December recording 80 mm (3.2 in) across 8 days. Additionally, humidity is higher in December at 84%, compared to 77% in January. For more insights, you can explore Porto Alegre weather in December.
In January, Porto Alegre experiences a blend of heat and humidity, making it distinctly different from other months. With temperatures peaking at a sweltering 39°C (103°F) and an average of 26°C (79°F), visitors can expect a vibrant atmosphere filled with outdoor activities. However, the month also brings its share of rain, with precipitation occurring on 12 days, contributing to an overall humidity of 77%. This combination of warm weather and significant rainfall gives January a unique character, perfect for enjoying the city's lush greenery and lively culture. For a deeper understanding of what to expect throughout the year, be sure to explore the details on Porto Alegre Climate.