Porto Alegre weather live forecast

Today's maximum temperature in Porto Alegre is expected to be 66°F. Select a day from the live weather forecast for Porto Alegre, Brazil for more weather parameters.

5-day weather forecast updated at 04:01 on Thursday 4th September 2025 GMT

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The 5-day weather forecast for Brazil (Porto Alegre) is provided by the Swiss meteorological agency, meteoblue. Find out more about our data sources.

Porto Alegre weather forecast by day

Below are the detailed weather forecasts for Porto Alegre for the next 5 days.

Porto Alegre weather for Thursday 4th September 2025

Expect isolated thunderstorms in Porto Alegre, Brazil with a maximum temperature of 66°F, maximum UV of 1 (Low) and no hours of bright sunshine. There are 40-50 mm of rainfall expected with 98% chance of some rain and little or no wind of 4 mph from the south.

  • 66°F maximum temperature66
    °F maximum temperature
  • 54°F minimum temperature54
    °F minimum temperature
  • Isolated thunderstorms
    isolated thunderstorms
  • No hours of bright sunshine0
    hours of sunshine
  • UV (maximum) index 1 (Low)1
    UV index (Low)
  • 98% chance of some rain98
    % chance of some rain
  • 40-50 mm of rainfall expected<50
    mm of rainfall expected
  • No heat & humidity0
    no heat & humidity
  • Little or no wind of 4 mph from the South4
    mph wind from S

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Porto Alegre weather for Friday 5th September 2025

Expect overcast skies in Porto Alegre, Brazil with a maximum temperature of 54°F, maximum UV of 4 (Moderate) and no hours of bright sunshine. There are 0 mm of rainfall expected and little or no wind of 3 mph from the south.

  • 54°F maximum temperature54
    °F maximum temperature
  • 52°F minimum temperature52
    °F minimum temperature
  • Overcast skies
    overcast skies
  • No hours of bright sunshine0
    hours of sunshine
  • UV (maximum) index 4 (Moderate)4
    UV index (Moderate)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • No heat & humidity0
    no heat & humidity
  • Little or no wind of 3 mph from the South3
    mph wind from S

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Porto Alegre weather for Saturday 6th September 2025

Expect overcast skies in Porto Alegre, Brazil with a maximum temperature of 59°F, maximum UV of 4 (Moderate) and no hours of bright sunshine. There are 0 mm of rainfall expected and little or no wind of 3 mph from the south-east.

  • 59°F maximum temperature59
    °F maximum temperature
  • 50°F minimum temperature50
    °F minimum temperature
  • Overcast skies
    overcast skies
  • No hours of bright sunshine0
    hours of sunshine
  • UV (maximum) index 4 (Moderate)4
    UV index (Moderate)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • No heat & humidity0
    no heat & humidity
  • Little or no wind of 3 mph from the South-East3
    mph wind from SE

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Porto Alegre weather for Sunday 7th September 2025

Expect broken clouds in Porto Alegre, Brazil with a maximum temperature of 66°F, maximum UV of 7 (High) and 3 hours of bright sunshine. There are 0 mm of rainfall expected and little or no wind of 4 mph from the east.

  • 66°F maximum temperature66
    °F maximum temperature
  • 55°F minimum temperature55
    °F minimum temperature
  • Broken clouds
    broken clouds
  • 3 hours of bright sunshine3
    hours of sunshine
  • UV (maximum) index 7 (High)7
    UV index (High)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • No heat & humidity0
    no heat & humidity
  • Little or no wind of 4 mph from the East4
    mph wind from E

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Porto Alegre weather for Monday 8th September 2025

Expect isolated thunderstorms in Porto Alegre, Brazil with a maximum temperature of 68°F, maximum UV of 3 (Moderate) and no hours of bright sunshine. There are 2-5 mm of rainfall expected with 95% chance of some rain and little or no wind of 2 mph from the east.

  • 68°F maximum temperature68
    °F maximum temperature
  • 59°F minimum temperature59
    °F minimum temperature
  • Isolated thunderstorms
    isolated thunderstorms
  • No hours of bright sunshine0
    hours of sunshine
  • UV (maximum) index 3 (Moderate)3
    UV index (Moderate)
  • 95% chance of some rain95
    % chance of some rain
  • 2-5 mm of rainfall expected<5
    mm of rainfall expected
  • 68°F wind chill68
    °F wind chill
  • Little or no wind of 2 mph from the East2
    mph wind from E

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