December weather forecastKey Largo, FL
December
Weather in December
December represents the coolest month in Key Largo, illustrating a stark contrast in temperature compared to November. Lesser rainfall and limited daylight hours define the city’s weather in this month. The island city lapses into a serene and less crowded phase, making it an ideal time for those seeking tranquility. However, even in its coldest month, the sea remains warm enough for swimming. This month, the highest temperature records 75.2°F (24°C), with rainfall reduced to just 0.91" (23mm).Temperature
The beginning of December reveals an average high-temperature of a still warm 75.2°F (24°C), showing minimal deviation from the previous month. December nights reflect a consistent temperature dip to a pleasant 71.1°F (21.7°C), a slight descent from daytime peaks.Humidity
February, June and December, with an average relative humidity of 76%, are the most humid months.Rainfall
In Key Largo, in December, during 12.5 rainfall days, 0.91" (23mm) of precipitation is typically accumulated. Throughout the year, there are 190.1 rainfall days, and 27.05" (687mm) of precipitation is accumulated.Ocean temperature
In December, the average ocean temperature is 76.3°F (24.6°C).Note: Cold sensitivities vary, but with the right amount of sunshine, a gentle breeze, and a warm day, a swim in 76.3°F (24.6°C) waters might be just right. Remember, Olympic swimmers are used to waters between 77°F (25°C) and 82.4°F (28°C).
Daylight
With an average of 10h and 36min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 6:50 am and sunset at 5:31 pm. On the last day of December, sunrise is at 7:06 am and sunset at 5:43 pm EST.
Sunshine
December has the least sunshine of the year, with an average of 6.4h of sunshine.UV index
In December, the average daily maximum UV index is 6. A UV Index reading of 6 to 7 represents a high health risk from unprotected exposure to Sun's UV rays for average individuals.Note: The daily high UV index of 6 in December translates into this advice:
Resist overexposure. Safeguarding from solar damage is indispensable. UV radiation from the Sun is most intense between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear. Be cautious! Sand and water surfaces make the Sun's UV rays more potent.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Key Largo, FL
- Average high temperature in December: 75.2°F
The warmest month (with the highest average high temperature) is August (85.5°F).
The month with the lowest average high temperature is January (72.7°F).
- Average low temperature in December: 71.1°F
The month with the highest average low temperature is August (82.9°F).
The coldest month (with the lowest average low temperature) is January (66.9°F).
Average pressure in December
Key Largo, FL
- Average pressure in December: 30.07"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The months with the lowest atmospheric pressure are September and October (29.94"Hg).
Average wind speed in December
Key Largo, FL
- Average wind speed in December: 12.4mph
The windiest month (with the highest average wind speed) is January (12.9mph).
The calmest month (with the lowest average wind speed) is July (8.9mph).
Average humidity in December
Key Largo, FL
- Average humidity in December: 76%
The months with the highest relative humidity are February, June and December (76%).
The month with the lowest relative humidity is March (73%).
Average rainfall in December
Key Largo, FL
- Average rainfall in December: 0.91"
The wettest month (with the highest rainfall) is August (4.33").
The driest month (with the least rainfall) is March (0.59").
Average rainfall days in December
Key Largo, FL
- Average rainfall days in December: 12.5 days
The month with the highest number of rainy days is September (22.9 days).
The month with the least rainy days is February (9.7 days).
Average sea temperature in December
Key Largo, FL
- Average sea temperature in December: 76.3°F
The best month for swimming (with the highest average sea temperature) is August (86.5°F).
The coldest month (with the lowest average sea temperature) is February (74°F).
Average daylight in December /
Average sunshine in December
Key Largo, FL
- Average daylight in December: 10h and 36min
The month with the longest days is June (Average daylight: 13h and 42min).
The month with the shortest days is December (Average daylight: 10h and 36min).
- Average sunshine in December: 6h and 24min
The month with the most sunshine is July (Average sunshine: 11h and 0min).
The month with the least sunshine is December (Average sunshine: 6h and 24min).
Average sunshine days in December
Key Largo, FL
- Average sunshine days in December: 14.9 days
The month with the most sunshine days is January (17.3 days).
The month with the least sunshine days is September (5.2 days).
Average UV index in December
Key Largo, FL
- Average UV index in December: 6
The months with the highest UV index are April, May, June, July, August, September and October (UV index 7).
The month with the lowest UV index is January (UV index 5).
Average cloud cover in December
Key Largo, FL
- Average cloud cover in December: 33
The month with the most cloud cover is October (Cloud cover 35).
The month with the least cloud cover is April (Cloud cover 26).
Average visibility in December
Key Largo, FL
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
