Sao Luis weather in December 2025

Expect daytime maximum temperatures of 90°F in Sao Luis, Brazil in December and very high heat and humidity based on long-term weather averages. There are 7 hours of sunshine per day on average with 12 days with some rainfall and typically 3.3 inches of rainfall in the month.

  • 90°F maximum daytime temperature in December in Sao Luis90
    90°F max day temperature
  • 7 hours of sunshine per day
  • 12 days with some rainfall in December in Sao Luis12
    12 days with some rainfall
  • 73°F minimum night-time temperature in December in Sao Luis73
    73°F min night temperature
  • 12 hours of daylight per day in December in Sao Luis12
    12 hours of daylight per day
  • Very high heat & humidity in December in Sao LuisVH
    Very High heat & humidity
  • 3.3 inches monthly rainfall in December in Sao Luis3.3
    3.3 inches of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in December in Sao Luis11
    11+ (Extreme) UV index
  • 81°F sea temperature in December in Sao Luis81
    81°F sea temperature

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The December weather guide for Brazil (Sao Luis) 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)  |  Imperial (°F)

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More about Brazil

How hot is it in Sao Luis in December?

Daytime temperatures usually reach 90°F in Sao Luis in December with very high heat and humidity, falling to 73°F at night.

How sunny is it in Sao Luis in December?

There are normally 7 hours of bright sunshine each day in Sao Luis in December - that's 55% of daylight hours.

How warm is the sea around Sao Luis in December?

The average sea temperature around Sao Luis in December is 81°F.

Does it rain in Sao Luis in December?

There are usually 12 days with some rain in Sao Luis in December and the average monthly rainfall is 3.3 inches.

Sao Luis December sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st December 2025 05:39 17:54
Tuesday, 16th December 2025 05:45 18:01
Wednesday, 31st December 2025 05:52 18:08

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