Porto Alegre weather in December 2025

Expect daytime maximum temperatures of 28°C in Porto Alegre, Brazil in December based on long-term weather averages. There are 8 hours of sunshine per day on average with 16 days with some rainfall and typically 101 mm of rainfall in the month.

  • 28°C maximum daytime temperature in December in Porto Alegre28
    28°C max day temperature
  • 8 hours of sunshine per day
  • 16 days with some rainfall in December in Porto Alegre16
    16 days with some rainfall
  • 18°C minimum night-time temperature in December in Porto Alegre18
    18°C min night temperature
  • 14 hours of daylight per day in December in Porto Alegre14
    14 hours of daylight per day
  • Low heat & humidity in December in Porto AlegreL
    Low heat & humidity
  • 101 mm monthly rainfall in December in Porto Alegre101
    101 mm of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in December in Porto Alegre11
    11+ (Extreme) UV index

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The December weather guide for Brazil (Porto Alegre) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C / mm)  |  Imperial (°F / inches)

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How hot is it in Porto Alegre in December?

Daytime temperatures usually reach 28°C in Porto Alegre in December with low heat and humidity, falling to 18°C at night.

How sunny is it in Porto Alegre in December?

There are normally 8 hours of bright sunshine each day in Porto Alegre in December - that's 56% of daylight hours.

Does it rain in Porto Alegre in December?

There are usually 16 days with some rain in Porto Alegre in December and the average monthly rainfall is 101mm.

Porto Alegre December sunrise & sunset times

Browse the sunrise and sunset times for Porto Alegre in December 2025. Select a month to view Porto Alegre sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st December 2025 05:16 19:12
Tuesday, 16th December 2025 05:18 19:23
Wednesday, 31st December 2025 05:27 19:29

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