Key Largo, Florida Keys weather in December
Temperature, sea and sunshine in December: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in December
Excellent
Best time to visit: October – May
What is the weather like in Key Largo, Florida Keys in December?
In December, Key Largo, Florida Keys is warm: daytime highs average 25 °C, and nights cool down to about 19 °C. The sea averages 25.2 °C – pleasant for swimming. Expect around 6 hours of sunshine a day. Rain falls on about 5 days, adding up to 34 mm. The air is often humid and muggy. All in all, December is an excellent month for a holiday in Key Largo, Florida Keys.
December compared
How the weather changes from November to January. Tap a month to open it.
| NovemberNov | DecemberDec | JanuaryJan | |
|---|---|---|---|
| Score | 90 | 87 | 81 |
| Day | 26° | 25° | 23° |
| Night | 21° | 19° | 18° |
| Sea | 26° | 25° | 24° |
| Sun | 6 h | 6 h | 7 h |
| Rain days | 5 | 5 | 5 |
More details for December
- Daylight
- 10 h 35 min06:59 – 17:35
- UV index
- 4 · moderateclear sky, noon (estimate)All months
- Muggy days
- 16 daysdew point 18 °C or moreAll months
- Wind
- 22 km/haverage daily peakAll months
- Cloud cover
- 44 %on averageAll months
- Hot days
- 0 days30 °C or moreAll months
- Time zone
- UTC−5America/New_York
How the score comes together
- Temperatureweight 35 %93 %
- Seaweight 25 %100 %
- Sunshineweight 20 %55 %
- Few rainy daysweight 20 %93 %
Each factor is rated from 0 to 100 % and weighted for the travel style “Sun, sea & sand”.
What to pack in December
- Swimwear
- Sunscreen
- Insect repellent
Key Largo, Florida Keys in December: quick answers
Is Key Largo, Florida Keys hot in December?
Warm rather than hot: in December, daytime highs in Key Largo, Florida Keys average 25 °C and nights cool to about 19 °C.
Can you swim in Key Largo, Florida Keys in December?
Yes. In December the sea averages 25.2 °C – pleasant for swimming.
Does it rain much in Key Largo, Florida Keys in December?
Rain falls on about 5 days, adding up to 34 mm.
Key Largo, Florida Keys month by month
The whole year in Key Largo, Florida KeysAll destinations: USAFlorida weather in DecemberWhere to go in DecemberSea temperature in December
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences