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Contents
- The climate of Porto Alegre
- The best time to visit Porto Alegre
- The worst time to visit Porto Alegre
- Spring weather in Porto Alegre
- Summer weather in Porto Alegre
- Autumn weather in Porto Alegre
- Winter weather in Porto Alegre
- Weather in January
- Weather in February
- Weather in March
- Weather in April
- Weather in May
- Weather in June
- Weather in July
- Weather in August
- Weather in September
- Weather in October
- Weather in November
- Weather in December
- Frequently asked questions
- Average temperature
- Average pressure
- Average wind speed
- Average humidity
- Average rainfall
- Average rainfall days
- Average sea temperature
- Average daylight
- Average sunshine
- Average sunshine days
- Average UV index
- Average cloud cover
- Average visibility
The climate of Porto Alegre
Porto Alegre, located in Brazil, falls within the Köppen climate classification as Cfa, know as the humid subtropical zone with no dry season. The city receives considerable precipitation throughout the year, with July bearing the brunt of the rainfall, accumulating 103mm (4.06") on average. However, the spring months don't evade this weather pattern either, with September seeing 90mm (3.54") of rainfall.
Throughout the year, average temperatures in Porto Alegre vary moderately. High temperatures hover from 18.8°C (65.8°F) in July to a peak of 30.5°C (86.9°F) in February. At the other end of the spectrum, expect lower temperatures ranging from 10.6°C (51.1°F) in July to 20°C (68°F) in January and February. December and January note the highest level of relative humidity, with an average of 81%.
On the other end of weather variables, Porto Alegre experiences sunlight over a reasonable spread of the year. The city enjoys the longest daylight hours in December, averaging 14.1 hours per day. Meanwhile, June presents the shortest span of daylight with an average of 10.2 hours.
Throughout the year, average temperatures in Porto Alegre vary moderately. High temperatures hover from 18.8°C (65.8°F) in July to a peak of 30.5°C (86.9°F) in February. At the other end of the spectrum, expect lower temperatures ranging from 10.6°C (51.1°F) in July to 20°C (68°F) in January and February. December and January note the highest level of relative humidity, with an average of 81%.
On the other end of weather variables, Porto Alegre experiences sunlight over a reasonable spread of the year. The city enjoys the longest daylight hours in December, averaging 14.1 hours per day. Meanwhile, June presents the shortest span of daylight with an average of 10.2 hours.
The best time to visit Porto Alegre
The best time to visit Porto Alegre generally falls between April and June. During these months, the city experiences reduced rainfall, with the lowest precipitation levels of 36mm (1.42") in April. The temperature during this period ranges from 15.8°C (60.4°F) to 25.5°C (77.9°F), marking this season as considerably milder compared to the rest of the year. Alongside, the city enjoys an average of 7.2 hours of sunshine daily, with a UV index rating of 4 on average, indicating moderate exposure levels.
The worst time to visit Porto Alegre
While Porto Alegre can offer enjoyable weather conditions year-round, November and December might present some challenges. This period is characterized by high temperatures ranging from 27.1°C (80.8°F) to 29.8°C (85.6°F), combined with substantial rainfall amounts of 73mm (2.87") and 60mm (2.36"), respectively. These conditions may not be ideal for outdoor activities and can result in uncomfortable levels of humidity.
Spring weather in Porto Alegre
Spring in Porto Alegre can be a mix of warm and wet conditions. September, October, and November experience average high temperatures from 21.1°C (70°F) to 27.1°C (80.8°F). However, this period also recognizes some of the highest rainfall counts throughout the year, with September receiving 90mm (3.54"). Moreover, these months also offer a moderate range of daylight hours, from 11.1 hours in September to 13.6 hours in November.
Summer weather in Porto Alegre
In Porto Alegre, summer is characterized by a combination of heat and moisture. During these months, the average daily high temperature can range from 27.1°C (80.8°F) in December to a peak of 30.5°C (86.9°F) in February. Alongside, it experiences a hefty average rainfall count of 56mm (2.2") in December to a drop of 49mm (1.93") in February. The long hours of daylight, ranging from 13.6 hours in December to 13.1 hours in February, also contribute to the perception of a long, hot, and humid summer.
Autumn weather in Porto Alegre
Autumn sees a slowdown in Porto Alegre's climate intensity, with temperatures falling from 25.5°C (77.9°F) in March to 19.3°C (66.7°F) by May. Along with this, rainfall decreases from 51mm (2.01") in March to 36mm (1.42") in April before rising to 70mm (2.76") in May. Daily hours of sunlight show a decline from 11.9 hours in March to 10.6 hours by May.
Winter weather in Porto Alegre
A winter visit to Porto Alegre will present relatively mild weather conditions. The season is characterized by the lowest temperatures of the year, falling from 18.8°C (65.8°F) in June to 19.3°C (66.7°F) in August. However, this period also sees a resurgence in rainfall from 75mm (2.95") in June to a substantial leap to 103mm (4.06") in July. Despite the lower temperatures and increased rainfall, the city still experiences reasonable daylight hours, ranging from 10.2 hours in June to 11.1 hours in August.
Weather in January
The Porto Alegre weather in January is characterized by high temperatures and humidity. The city experiences its highest average temperature at 30.3°C (86.5°F) along with moderate rainfall of 56mm (2.2"). Frequent showers mark the beginning of the year, giving the landscape a fresh, vibrant look. Weather in January »
Weather in February
As February rolls in, the consistent warmth of Porto Alegre continues from the previous month with a slight drop in temperature to 30.5°C (86.9°F). Rainfall subsides, making outdoor activities more enjoyable. The tropical climate of the city maintains its charm throughout February, attracting a steady flow of visitors. Weather in February »
Weather in March
The weather in March in Porto Alegre is marked by a dip in temperature to 28°C (82.4°F) and a slight increase in humidity. The rainfall remains constant from the previous month, providing relief from the heat. March days in Porto Alegre are filled with intermittent sunshine leading to pleasant weather conditions for outdoor pursuits. Weather in March »
Weather in April
In April, Porto Alegre reveals a noticeable cooling trend with an average high temperature decreasing to 25.5°C (77.9°F) and a significant drop in rainfall to 36mm (1.42"). April brings in the first signs of autumn with shorter days and longer nights. Weather in April »
Weather in May
The weather in Porto Alegre in May transitions from warm to mild, with an average high temperature of 21.9°C (71.4°F). The city’s landscape alters as the rainfall increases significantly to 70mm (2.76"). With lesser hours of daylight, the weather is more on the cooler side, making it ideal for trekking and other strenuous activities. Weather in May »
Weather in June
June brings the winter solstice to Porto Alegre with a considerable drop in temperature to 19.3°C (66.7°F) and increased rain activity as rainfall ascends to 75mm (2.95"). The Porto Alegre sky is overcast more often, and the daylight diminishes considerably. Weather in June »
Weather in July
Weather in July in Porto Alegre is characterized by cooler temperatures, with an average high of 18.8°C (65.8°F) and the year’s highest rainfall of 103mm (4.06"). The clouds in July render the sky a bit gloomy yet captivating. Weather in July »
Weather in August
In August, Porto Alegre weather moves towards warmer conditions with a rise in temperatures to 21.1°C (70°F), while the rainfall lessens to 76mm (2.99"). August acts as a bridging month between the cool, rainy winter and the warmer, drier spring. Weather in August »
Weather in September
September in Porto Alegre marks a noticeable change with temperatures up at 22°C (71.6°F) and rainfall down to 66mm (2.6"). The city embraces spring with warmer weather and longer daylight hours. Porto Alegre in September offers a perfect blend of mild climate, extended sunlight, and reduced rainfall. Weather in September »
Weather in October
October carries the Porto Alegre weather into traditional spring conditions. Temperature rises further to 24.5°C (76.1°F) and rainfall increases to 90mm (3.54"). October’s moderate heat and rain showers signal an optimal time for exploring the city’s botanical gardens and parks. Weather in October »
Weather in November
Porto Alegre in November experiences a further rise in temperature to 27.1°C (80.8°F) and a slight decrease in rainfall to 73mm (2.87"). The city gracefully transitions from spring to summer, opening windows for various outdoor activities. Weather in November »
Weather in December
December showcases the height of summer in Porto Alegre with warm weather, a high temperature nearing 29.8°C (85.6°F), and substantial rainfall of 60mm (2.36"). The onset of summer adorns the city with a festive glow, complemented by clear skies and an abundance of sunlight. Weather in December »
[Resources]Frequently asked questions
How much does it rain in Porto Alegre?
In Porto Alegre, during the entire year, the rain falls for 148.3 days and collects up to 805mm (31.69") of precipitation.
What month is the sea warmest in Porto Alegre?
January is the month with the warmest seawater, with an average sea temperature of 24.7°C (76.5°F).
What is the warmest month in Porto Alegre?
Porto Alegre's February weather reaches an average high of 30.5°C (86.9°F) and an average low of 20°C (68°F), making it the warmest month.
What is the driest month in Porto Alegre?
The month with the least rainfall is April, when the rain falls for 9.8 days and typically collects 36mm (1.42") of precipitation.
What is the month with the lowest UV index in Porto Alegre?
May through July, with an average maximum UV index of 4, are months with the lowest UV index in Porto Alegre, Brazil.
What is the most humid month in Porto Alegre?
The most humid month is June, with an average relative humidity of 81%.
What is the month with the shortest days in Porto Alegre?
With an average of 10h and 12min of daylight, June has the shortest days of the year in Porto Alegre, Brazil.
What month is the coldest in Porto Alegre?
Porto Alegre's coldest month, July, registers temperatures that range from a high of 18.8°C (65.8°F) to a low of 10.6°C (51.1°F).
What is the rainiest month in Porto Alegre?
July is the month with the most rainfall in Porto Alegre. Rain falls for 12.1 days and accumulates 103mm (4.06") of precipitation.
What is the month with the coldest sea water in Porto Alegre?
August is the month with the coldest seawater in Porto Alegre, Brazil, with an average sea temperature of 15.8°C (60.4°F).
What is the month with the least sunshine in Porto Alegre?
September has the least sunshine of the year, with an average of 7h of sunshine.
What is the least humid month in Porto Alegre?
The least humid month is December, with an average relative humidity of 71%.
When are the longest days in Porto Alegre?
The month with the longest days is December, with an average of 14h and 0min of daylight.
Is there Daylight Saving Time (DST) in Porto Alegre?
Porto Alegre, Brazil, does not utilize Daylight Saving Time (DST). -03 timezone is used over the entire year.
What month has the most sunshine in Porto Alegre?
December has the most sunshine of the year in Porto Alegre, Brazil, with an average of 8.3h of sunshine.
What is the month with the highest UV index in Porto Alegre?
The month with the highest UV index is December, with an average maximum UV index of 7.
Average temperature
Porto Alegre, Brazil
The warmest month (with the highest average high temperature) is February (30.5°C).
The month with the lowest average high temperature is July (18.8°C).
The months with the highest average low temperature are January and February (20°C).
The coldest month (with the lowest average low temperature) is July (10.6°C).
Average pressure
Porto Alegre, Brazil
- Average pressure in January:
1012.3mbar - Average pressure in February:
1012.5mbar - Average pressure in March:
1014.3mbar - Average pressure in April:
1016.4mbar - Average pressure in May:
1017.8mbar - Average pressure in June:
1018.9mbar
- Average pressure in July:
1019.8mbar - Average pressure in August:
1019mbar - Average pressure in September:
1017.2mbar - Average pressure in October:
1014.9mbar - Average pressure in November:
1013mbar - Average pressure in December:
1011.4mbar
The month with the highest atmospheric pressure is July (1019.8mbar).
The month with the lowest atmospheric pressure is December (1011.4mbar).
Average wind speed
Porto Alegre, Brazil
- Average wind speed in January:
11.6km/h - Average wind speed in February:
11.1km/h - Average wind speed in March:
10.9km/h - Average wind speed in April:
10.4km/h - Average wind speed in May:
10km/h - Average wind speed in June:
10.2km/h
- Average wind speed in July:
10.9km/h - Average wind speed in August:
11.3km/h - Average wind speed in September:
12km/h - Average wind speed in October:
12.1km/h - Average wind speed in November:
12km/h - Average wind speed in December:
11.9km/h
The windiest month (with the highest average wind speed) is October (12.1km/h).
The calmest month (with the lowest average wind speed) is May (10km/h).
Average humidity
Porto Alegre, Brazil
The month with the highest relative humidity is June (81%).
The month with the lowest relative humidity is December (71%).
Average rainfall
Porto Alegre, Brazil
The wettest month (with the highest rainfall) is July (103mm).
The driest month (with the least rainfall) is April (36mm).
Average rainfall days
Porto Alegre, Brazil
- Average rainfall days in January:
14.6 days - Average rainfall days in February:
12.3 days - Average rainfall days in March:
12.4 days - Average rainfall days in April:
9.8 days - Average rainfall days in May:
10.3 days - Average rainfall days in June:
10.7 days
- Average rainfall days in July:
12.1 days - Average rainfall days in August:
12 days - Average rainfall days in September:
13.9 days - Average rainfall days in October:
15 days - Average rainfall days in November:
11.5 days - Average rainfall days in December:
13.7 days
The month with the highest number of rainy days is October (15 days).
The month with the least rainy days is April (9.8 days).
Average sea temperature
Porto Alegre, Brazil
The best month for swimming (with the highest average sea temperature) is January (24.7°C).
The coldest month (with the lowest average sea temperature) is August (15.8°C).
Average daylight / Average sunshine
Porto Alegre, Brazil
- Average daylight in January:
13h and 5min - Average daylight in February:
13h and 1min - Average daylight in March:
12h and 2min - Average daylight in April:
11h and 2min - Average daylight in May:
10h and 4min - Average daylight in June:
10h and 1min
- Average daylight in July:
10h and 2min - Average daylight in August:
11h and 1min - Average daylight in September:
11h and 5min - Average daylight in October:
12h and 5min - Average daylight in November:
13h and 4min - Average daylight in December:
14h and 0min
The month with the longest days is December (Average daylight: 14h and 0min).
The month with the shortest days is June (Average daylight: 10h and 12min).
- Average sunshine in January:
8h and 1min - Average sunshine in February:
8h and 1min - Average sunshine in March:
8h and 0min - Average sunshine in April:
7h and 5min - Average sunshine in May:
7h and 1min - Average sunshine in June:
7h and 1min
- Average sunshine in July:
7h and 2min - Average sunshine in August:
7h and 2min - Average sunshine in September:
7h and 0min - Average sunshine in October:
7h and 4min - Average sunshine in November:
8h and 1min - Average sunshine in December:
8h and 2min
The month with the most sunshine is December (Average sunshine: 8h and 18min).
The month with the least sunshine is September (Average sunshine: 7h and 0min).
Average sunshine days
Porto Alegre, Brazil
- Average sunshine days in January:
15.2 days - Average sunshine days in February:
15.3 days - Average sunshine days in March:
17.4 days - Average sunshine days in April:
19.8 days - Average sunshine days in May:
19.9 days - Average sunshine days in June:
18 days
- Average sunshine days in July:
17.9 days - Average sunshine days in August:
17.3 days - Average sunshine days in September:
14.4 days - Average sunshine days in October:
14.5 days - Average sunshine days in November:
17.2 days - Average sunshine days in December:
17.2 days
The month with the most sunshine days is May (19.9 days).
The month with the least sunshine days is September (14.4 days).
Average UV index
Porto Alegre, Brazil
The month with the highest UV index is December (UV index 7).
The months with the lowest UV index are May, June and July (UV index 4).
Average cloud cover
Porto Alegre, Brazil
The month with the most cloud cover is September (Cloud cover 41).
The month with the least cloud cover is November (Cloud cover 32).
Average visibility
Porto Alegre, Brazil
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
Porto Alegre, Brazil
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