Porto Alegre weather and climate in 2025
Day
21 °C
Night
11 °C
Sea
16 °C
Precipitation
115 mm
in month
Rainy days
12 days
in month
Daylight
11 hours
average
Sunshine
5 hours
average
Humidity
80 %
Day
21 °C
Night
11 °C
Sea
16 °C
Precipitation
115 mm
in month
Rainy days
12 days
in month
Daylight
11 hours
average
Sunshine
5 hours
average
Humidity
80 %
Overview: Porto Alegre
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Weather overview for Porto Alegre
Weather overview
Porto Alegre generally offers a humid subtropical climate, with distinct seasons influenced by the city's position in Southern Brazil. Summers are usually warm and temperate, while winters can be cool, showcasing the city's diverse temperature range. Across the year, precipitation is fairly regular, but there's a modest increase in rainfall during the spring months. Porto Alegre's weather patterns reflect the region's dynamic climate, where sultry summer days transition into chilly winter nights, with an annual temperature average hovering around 24 °C (75 °F).
January weather
January in Porto Alegre brings warm and balmy days with average daytime highs of 29 °C (85 °F), whereas the nights remain relatively comfortable at around 20 °C (68 °F). The month also experiences a fair amount of wetness with an average of 14 days of precipitation, which contributes to the overall rainfall of 145 mm (5.70 in).
February weather
As February arrives, the high temperatures in Porto Alegre slightly dip to an average of 29 °C (84 °F) during the day. February also upholds January's rainfall pattern with 13 days expected to be wet and contributing to a monthly precipitation total of 129 mm (5.09 in).
March weather
March signifies the tail end of summer with Porto Alegre experiencing a modest decrease in temperatures, netting an average daytime high of 28 °C (82 °F). The city continues to see recurrent showers, marking around 12 days of rainfall.
April weather
April marks the transition to a cooler atmosphere in Porto Alegre, with the average daytime temperatures falling to 25 °C (77 °F). The weather remains relatively moist, with precipitation observed on about 10 days.
May weather
The cooler vibes of May permeate Porto Alegre, with daytime temperatures reaching an average high of 22 °C (71 °F). Rainfall borders on the consistent side, with roughly 11 days reporting precipitation.
June weather
June sees a further temperature dip in Porto Alegre, especially during the night when the mercury can drop to 11 °C (53 °F). Daytime offers modest warmth, around 20 °C (67 °F) on average, and the expected rainy days tally to 12 days.
July weather
July's winter chill is felt in Porto Alegre with the coldest nights averaging 11 °C (51 °F), while days remain moderately cool at an average high of 19 °C (67 °F). The city gets soaked on around 12 days this month.
August weather
August sees a slight reversal in the cooling trend as Porto Alegre's daytime highs start crawling up to 21 °C (69 °F), while the rainfall stabilizes around 12 days for the month.
September weather
The bloom of spring in September acts as a prelude to the warmth, offering Porto Alegre a pleasant 22 °C (72 °F) during the day. The city witnesses about 13 days of rainfall, staying in line with the previous months' patterns.
October weather
In October, Porto Alegre experiences a further rise in temperatures, with average daytime highs nearing 25 °C (76 °F), while the city also tallies around 12 days of rain.
November weather
The weather wisely warms in November as summer air begins to envelop Porto Alegre, boasting an average high of 27 °C (81 °F), and rain occurs on about 11 days.
December weather
As the year ends, December ushers in its fair share of warmth with Porto Alegre basking in an average high of 28 °C (82 °F). Rainfall remains a constant companion with roughly 12 days forecast to be wet.
FAQs
Is January a particularly hot month in Porto Alegre?
January in Porto Alegre is indeed hot, with daytime temperatures soaring up to 29 °C (85 °F). Prepare for sunny days and warm breezes.
Are there any significant changes in Porto Alegre's weather from January to February?
February maintains the warmth from January though the slight decrease in the average daily high to 29 °C (84 °F) is noticeable. The rain patterns are similar, keeping the city lush and verdant.
How does the weather transition in March in Porto Alegre?
March brings a gentler side of summer with temperatures gently receding to an average high of 28 °C (82 °F). The change from the intense summer heat is quite refreshing.
As the season changes, what are April's temperature trends in Porto Alegre?
April's temperature trends in Porto Alegre signify the onset of cooler weather, as average highs reach a mild 25 °C (77 °F). This month is perfect for those who prefer a more temperate climate.
How cool does it get in Porto Alegre during May?
In May, Porto Alegre embraces cooler temperatures, with a daytime high averaging at 22 °C (71 °F). The evening chill sets in as temperatures edge towards 14 °C (57 °F) at night.
What is the typical weather scenario in Porto Alegre for June?
June in Porto Alegre brings a crisp and cooler atmosphere, with daytime highs averaging 20 °C (67 °F), whilst nights can be quite brisk. This is a time to enjoy cozy evenings indoors.
How chilly do the nights get in Porto Alegre during July?
Porto Alegre experiences its chilliest nights in July, dipping to an average low of 11 °C (51 °F). You'll want to bundle up when the sun sets.
Does August mark the return of warmer days in Porto Alegre?
Indeed, August marks a soft turnaround towards warmth with an increase in average high temperatures reaching up to 21 °C (69 °F) in Porto Alegre.
What changes can be seen in the weather of Porto Alegre with the arrival of September?
September in Porto Alegre is delightful with a notable increase in temperatures, averaging 22 °C (72 °F) during the daytime, heralding the onset of spring.
How warm does Porto Alegre get in October?
October sees the city warming up considerably with daytime temperatures reaching a comfortable 25 °C (76 °F) - ideal for outdoor excursions and city exploration.
Does November in Porto Alegre feel like summer is near?
Absolutely, November has a clear summer vibe with temperatures escalating to an average high of 27 °C (81 °F), paving the way for warmer days ahead.
How does Porto Alegre's weather gear up for the end of the year in December?
December is festively warm in Porto Alegre, with daytime temperatures climbing to an average high of 28 °C (82 °F) - a perfect prelude to the summer season.
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