Key Largo weather in December 2025

Expect daytime maximum temperatures of 77°F in Key Largo, Florida in December based on long-term weather averages. There are 7 hours of sunshine per day on average.

  • 77°F maximum daytime temperature in December in Key Largo77
    77°F max day temperature
  • 7 hours of sunshine per day
  • 6 days with some rainfall in December in Key Largo6
    6 days with some rainfall
  • 59°F minimum night-time temperature in December in Key Largo59
    59°F min night temperature
  • 11 hours of daylight per day in December in Key Largo11
    11 hours of daylight per day
  • Low heat & humidity in December in Key LargoL
    Low heat & humidity
  • 1.4 inches monthly rainfall in December in Key Largo1.4
    1.4 inches of monthly rainfall
  • UV (maximum) index 5 (Moderate) in December in Key Largo5
    5 (Moderate) UV index
  • 77°F sea temperature in December in Key Largo77
    77°F sea temperature

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The December weather guide for Florida (Key Largo) 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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How hot is it in Key Largo in December?

Daytime temperatures usually reach 77°F in Key Largo in December with low heat and humidity, falling to 59°F at night.

How sunny is it in Key Largo in December?

There are normally 7 hours of bright sunshine each day in Key Largo in December - that's 67% of daylight hours.

How warm is the sea around Key Largo in December?

The average sea temperature around Key Largo in December is 77°F.

Does it rain in Key Largo in December?

There are usually 6 days with some rain in Key Largo in December and the average monthly rainfall is 1.4 inches.

Key Largo December sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st December 2025 06:50 17:32
Tuesday, 16th December 2025 07:00 17:35
Wednesday, 31st December 2025 07:07 17:43

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