Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average sea temperature in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
Weather in December
Temperature
Siesta Key registers an average high-temperature of an agreeable 72.5°F (22.5°C) with the arrival of December, showing minor deviation from the preceding month. Siesta Key's nighttime temperature during December is consistently averaged at an enjoyable 60.8°F (16°C).Humidity
December is the most humid month, with an average relative humidity of 76%.Rainfall
In Siesta Key, during December, the rain falls for 9.3 days and regularly aggregates up to 1.97" (50mm) of precipitation. Throughout the year, there are 183.1 rainfall days, and 34.92" (887mm) of precipitation is accumulated.Ocean temperature
In December, the average ocean temperature is 69.3°F (20.7°C).Note: Most people find swimming in 69.3°F (20.7°C) to be not enjoyable. The control of one's breathing becomes more challenging as the water temperature drops below 69.8°F (21°C).
Daylight
With an average of 10h and 30min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 7:03 am and sunset at 5:35 pm. On the last day of December, sunrise is at 7:19 am and sunset at 5:47 pm EST.
Sunshine
December has the least sunshine of the year, with an average of 6.5h of sunshine.UV index
The average daily maximum UV index in December is 5. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV rays for the ordinary person.Note: A daily maximum UV index of 5 in December translates into the following instructions:
Put precautions into practice - Guidance to elude sunburn is provided. When the Sun is at its strongest around midday, find shade and limit exposure. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average December temperature?
What is the most humid month?
What is the average humidity in December?
How many days does it rain in December?
How cold is the water in December?
What is the month with the shortest days?
What is the average length of the day in December?
When is the sunrise / sunset in December in Siesta Key?
What is the month with the least sunshine?
How many hours of sunshine does Siesta Key have in December?
What is the UV index reading in December?
Average temperature in December
Siesta Key, FL
- Average high temperature in December: 72.5°F
The warmest month (with the highest average high temperature) is August (88.5°F).
The month with the lowest average high temperature is January (68.5°F).
- Average low temperature in December: 60.8°F
The month with the highest average low temperature is August (79.7°F).
The coldest month (with the lowest average low temperature) is January (56.1°F).
Average pressure in December
Siesta Key, FL
- Average pressure in December: 30.1"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is September (29.95"Hg).
Average wind speed in December
Siesta Key, FL
- Average wind speed in December: 8.9mph
The windiest month (with the highest average wind speed) is January (9.3mph).
The calmest month (with the lowest average wind speed) is July (6.4mph).
Average humidity in December
Siesta Key, FL
- Average humidity in December: 76%
The month with the highest relative humidity is December (76%).
The months with the lowest relative humidity are March, April and May (72%).
Average rainfall in December
Siesta Key, FL
- Average rainfall in December: 1.97"
The wettest month (with the highest rainfall) is August (6.42").
The driest months (with the least rainfall) are February and November (1.06").
Average rainfall days in December
Siesta Key, FL
- Average rainfall days in December: 9.3 days
The month with the highest number of rainy days is August (26.8 days).
The months with the least rainy days are January, February and November (8.3 days).
Average sea temperature in December
Siesta Key, FL
- Average sea temperature in December: 69.2°F
The best month for swimming (with the highest average sea temperature) is August (86.7°F).
The coldest month (with the lowest average sea temperature) is January (64.1°F).
Average daylight in December /
Average sunshine in December
Siesta Key, FL
- Average daylight in December: 10h and 3min
The month with the longest days is June (Average daylight: 13h and 48min).
The month with the shortest days is December (Average daylight: 10h and 30min).
- Average sunshine in December: 6h and 3min
The month with the most sunshine is May (Average sunshine: 11h and 6min).
The month with the least sunshine is December (Average sunshine: 6h and 30min).
Average sunshine days in December
Siesta Key, FL
- Average sunshine days in December: 18.9 days
The month with the most sunshine days is January (21.1 days).
The month with the least sunshine days is August (2.5 days).
Average UV index in December
Siesta Key, FL
- Average UV index in December: 5
The months with the highest UV index are May, June, July, August and September (UV index 7).
The month with the lowest UV index is January (UV index 4).
Average cloud cover in December
Siesta Key, FL
- Average cloud cover in December: 30
The months with the most cloud cover are January and December (Cloud cover 30).
The month with the least cloud cover is May (Cloud cover 22).
Average visibility in December
Siesta Key, 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).
Siesta Key, Florida, USA
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