Montevideo weather in December 2025

Expect daytime maximum temperatures of 26°C in Montevideo, Uruguay in December based on long-term weather averages. There are 9 hours of sunshine per day on average with 10 days with some rainfall and typically 62 mm of rainfall in the month.

  • 26°C maximum daytime temperature in December in Montevideo26
    26°C max day temperature
  • 9 hours of sunshine per day
  • 10 days with some rainfall in December in Montevideo10
    10 days with some rainfall
  • 16°C minimum night-time temperature in December in Montevideo16
    16°C min night temperature
  • 14 hours of daylight per day in December in Montevideo14
    14 hours of daylight per day
  • Low heat & humidity in December in MontevideoL
    Low heat & humidity
  • 62 mm monthly rainfall in December in Montevideo62
    62 mm of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in December in Montevideo11
    11+ (Extreme) UV index
  • 21°C sea temperature in December in Montevideo21
    21°C sea temperature

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The December weather guide for Uruguay (Montevideo) 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 Montevideo in December?

Daytime temperatures usually reach 26°C in Montevideo in December with low heat and humidity, falling to 16°C at night.

How sunny is it in Montevideo in December?

There are normally 9 hours of bright sunshine each day in Montevideo in December - that's 64% of daylight hours.

How warm is the sea around Montevideo in December?

The average sea temperature around Montevideo in December is 21°C.

Does it rain in Montevideo in December?

There are usually 10 days with some rain in Montevideo in December and the average monthly rainfall is 62mm.

Montevideo December sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st December 2025 05:24 19:44
Tuesday, 16th December 2025 05:26 19:55
Wednesday, 31st December 2025 05:34 20:02

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