December weather forecast
Dismal Key, FL

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Weather in December

December, the first month of the winter in Dismal Key, is also a moderately hot month, with an average temperature fluctuating between 64.4°F (18°C) and 74.8°F (23.8°C).

Temperature

Dismal Key's shift into December is marked by a subtle change to a still moderately hot 74.8°F (23.8°C) from November's 78.4°F (25.8°C) in temperature. Dismal Key's nighttime temperature in December falls to an average of 64.4°F (18°C).

Humidity

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

Rainfall

In Dismal Key, during December, the rain falls for 7.9 days and regularly aggregates up to 0.87" (22mm) of precipitation. Throughout the year, in Dismal Key, Florida, there are 162.1 rainfall days, and 21.69" (551mm) of precipitation is accumulated.

Daylight

The month with the shortest days in Dismal Key is December, with an average of 10h and 36min of daylight.
On the first day of December in Dismal Key, sunrise is at 6:56 am and sunset at 5:34 pm. On the last day of the month, sunrise is at 7:12 am and sunset at 5:46 pm EST.

Sunshine

With an average of 6.7h of sunshine, December has the least sunshine of the year.

UV index

The average daily maximum UV index in December in Dismal Key, Florida, is 6. A UV Index estimate of 6 to 7 represents a high threat to health from exposure to the Sun's UV radiation for the average person.
Note: In December, the maximum UV index of 6 suggests these recommendations:
Persist in precautions and follow sun safety policies. Keeping sunburn at bay is imperative. Stay out of direct sunlight between 10 a.m. and 4 p.m., when UV radiation is most intense, and remember that not all shade structures provide complete protection. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days.
Updated: Feb 10, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are December temperatures in Dismal Key?

In Dismal Key, in December, the average high-temperature is 74.8°F (23.8°C), and the average low-temperature is 64.4°F (18°C). In October, the average heat index (a.k.a. 'felt air temperature', 'feels like'), which takes the relative humidity and factors it into the air temperature reading, is evaluated at 91.4°F (33°C).

What is the most humid month in Dismal Key?

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

What is the average humidity in December in Dismal Key?

The average relative humidity in December in Dismal Key, Florida, is 76%.

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

In Dismal Key, during December, the rain falls for 7.9 days and regularly aggregates up to 0.87" (22mm) of precipitation.

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

December has the shortest days of the year, with an average of 10h and 36min of daylight.

How many hours of daylight does Dismal Key have in December?

The average day length in December in Dismal Key is 10h and 33min.

When is the sunrise / sunset in December in Dismal Key?

On the first day of December in Dismal Key, sunrise is at 6:56 am and sunset at 5:34 pm. On the last day of the month, sunrise is at 7:12 am and sunset at 5:46 pm EST.

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

December has the least sunshine of the year, with an average of 6.7h of sunshine.

How long on average sun shines in December in Dismal Key?

The average sunshine duration in December in Dismal Key is 6.7h.

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

The average daily maximum UV index in December in Dismal Key is 6. A UV Index value of 6 to 7 symbolizes a high health vulnerability from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in December
Dismal Key, FL

Average temperature in December - Dismal Key, FL
  • Average high temperature in December: 74.8°F

The warmest month (with the highest average high temperature) is August (88.3°F).
The month with the lowest average high temperature is January (71.6°F).

  • Average low temperature in December: 64.4°F

The month with the highest average low temperature is August (80.2°F).
The coldest month (with the lowest average low temperature) is January (59.5°F).

Average pressure in December
Dismal Key, FL

Average pressure in December - Dismal Key, FL
  • Average pressure in December: 30.08"Hg

The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is September (29.94"Hg).

Average wind speed in December
Dismal Key, FL

Average wind speed in December - Dismal Key, FL
  • Average wind speed in December: 8.6mph

The windiest month (with the highest average wind speed) is November (9.2mph).
The calmest month (with the lowest average wind speed) is July (6.2mph).

Average humidity in December
Dismal Key, FL

Average humidity in December - Dismal Key, FL
  • Average humidity in December: 76%

The month with the highest relative humidity is December (76%).
The month with the lowest relative humidity is March (72%).

Average rainfall in December
Dismal Key, FL

Average rainfall in December - Dismal Key, FL
  • Average rainfall in December: 0.87"

The wettest month (with the highest rainfall) is August (4.29").
The driest month (with the least rainfall) is March (0.63").

Average rainfall days in December
Dismal Key, FL

Average rainfall days in December - Dismal Key, FL
  • Average rainfall days in December: 7.9 days

The month with the highest number of rainy days is August (22.4 days).
The month with the least rainy days is February (7 days).

Average daylight in December /
Average sunshine in December
Dismal Key, FL

Average daylight in December / Average sunshine in December - Dismal Key, FL
  • Average daylight in December: 10h and 4min

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 4min

The months with the most sunshine are May and July (Average sunshine: 11h and 6min).
The month with the least sunshine is December (Average sunshine: 6h and 42min).

Average sunshine days in December
Dismal Key, FL

Average sunshine days in December - Dismal Key, FL
  • Average sunshine days in December: 20.2 days

The month with the most sunshine days is January (21.8 days).
The month with the least sunshine days is August (6.8 days).

Average UV index in December
Dismal Key, FL

Average UV index in December - Dismal Key, FL
  • Average UV index in December: 6

The months with the highest UV index are May, June, July, August and September (UV index 7).
The months with the lowest UV index are January and February (UV index 5).

Average cloud cover in December
Dismal Key, FL

Average cloud cover in December - Dismal Key, FL
  • Average cloud cover in December: 27

The month with the most cloud cover is January (Cloud cover 28).
The months with the least cloud cover are March and April (Cloud cover 22).

Average visibility in December
Dismal Key, FL

Average visibility in December - Dismal 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).

Dismal Key, Florida, USA

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