December weather forecast and climate
Longboat Key, FL

The first month of the winter, December, is also an agreeable month in Longboat Key, Florida, with average temperature varying between 60.8°F (16°C) and 72.5°F (22.5°C).

Temperature

In December, the average high-temperature is relatively the same as in November - an agreeable 72.5°F (22.5°C). In December, in Longboat Key, Florida, the average low-temperature is 60.8°F (16°C).

Humidity

December is the most humid month in Longboat Key, with an average relative humidity of 76%.

Rainfall

In December, the rain falls for 9.3 days. Throughout December, 1.97" (50mm) of precipitation is accumulated. In Longboat Key, Florida, during the entire year, the rain falls for 183.1 days and collects up to 34.92" (887mm) of precipitation.

Ocean temperature

In December, the average ocean temperature is 69.3°F (20.7°C).
Note: For swimming, a surface water temperature of 69.3°F (20.7°C) is not enjoyable for the majority. It is not considered safe, as controlling breathing becomes progressively more difficult as water temperature decreases below 69.8°F (21°C).

Daylight

December has the shortest days of the year, with an average of 10.4h of daylight.

Sunshine

The month with the least sunshine is December, with an average of 6.5h of sunshine.

UV index

In Longboat Key, the average daily maximum UV index in December is 5. A UV Index value of 3 to 5 symbolizes a moderate health risk from unprotected exposure to the Sun's UV rays for the ordinary person.
Note: In December, the average maximum UV index of 5 translate into the following recommendations:
Take precautions - Protection against sunburn is recommended. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.

What is the temperature in December in Longboat Key?

In December, in Longboat Key, Florida, the average high-temperature is 72.5°F (22.5°C), and the average low-temperature is 60.8°F (16°C).

What is the most humid month in Longboat Key?

The most humid month is December, with an average relative humidity of 76%.

What is the average humidity in December in Longboat Key?

The average relative humidity in December in Longboat Key is 76%.

How many days does it rain in December in Longboat Key?

In December, in Longboat Key, the rain falls for 9.3 days. Throughout December, 1.97" (50mm) of precipitation is accumulated.

What is the ocean temperature in December in Longboat Key?

In Longboat Key, the average seawater temperature in December is 69.3°F (20.7°C). For swimming, a surface water temperature of 69.3°F (20.7°C) is not enjoyable for the majority. It is not considered safe, as controlling breathing becomes progressively more difficult as water temperature decreases below 69.8°F (21°C).

What is the month with the shortest days in Longboat Key?

The month with the shortest days in Longboat Key, Florida, is December, with an average of 10.4h of daylight.

What is the average length of the day in December in Longboat Key?

The average length of the day in December in Longboat Key is 10.4h.

What is the month with the least sunshine in Longboat Key?

December has the least sunshine of the year in Longboat Key, Florida, with an average of 6.5h of sunshine.

How many hours of sunshine does Longboat Key have in December?

The average sunshine in December is 6.5h.

What is the UV index intensity in December in Longboat Key?

In Longboat Key, Florida, the average daily maximum UV index in December is 5. A UV Index value of 3 to 5 symbolizes a medium hazard to health from unsafe exposure to the Sun's UV rays.
Average temperature in December - Longboat 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 - Longboat Key, FL
  • Average pressure in December: 30.1"

The month with the highest atmospheric pressure is January (30.13").
The month with the lowest atmospheric pressure is September (29.95").

Average wind speed in December - Longboat 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 - Longboat Key, FL
  • Average humidity in December: 76%

The month with the highest relative humidity is December (76%).
Months with the lowest relative humidity are March, April and May (72%).

Average rainfall in December - Longboat 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 - Longboat Key, FL
  • Average rainfall days in December: 9.3 days

The month with the highest number of rainy days is August (26.8 days).
Months with the least rainy days are January, February and November (8.3 days).

Average sea temperature in December - Longboat 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 - Longboat Key, FL
  • Average daylight in December: 10.4h

The month with the longest days is June (Average daylight: 13.9h).
The month with the shortest days is December (Average daylight: 10.4h).

  • Average sunshine in December: 6.5h

The month with the most sunshine is May (Average sunshine: 11.1h).
The month with the least sunshine is December (Average sunshine: 6.5h).

Average sunshine days in December - Longboat 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 - Longboat Key, FL
  • Average UV index in December: 5

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 - Longboat Key, FL
  • Average cloud cover in December: 30

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 - Longboat Key, FL
  • Average visibility in December: 6mi

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).