December weather forecast and climate
Dismal Key, FL

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

Temperature

In December, the average high-temperature is practically the same as in November - a still warm 74.8°F (23.8°C). In December, the average low-temperature is 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, Florida, 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, there are 162.1 rainfall days, and 21.69" (551mm) of precipitation is accumulated.

Daylight

December has the shortest days of the year, with an average of 10.5h of daylight.

Sunshine

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

UV index

In December, the average daily maximum UV index in Dismal Key is 6. A UV Index estimate of 6 to 7 represents a high threat to health from the exposure to the Sun's UV rays for the average person.
Note: In December, the average maximum UV index of 6 translate into the following recommendations:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.

What is the temperature in December in Dismal Key?

The average high-temperature, in December, is 74.8°F (23.8°C), while the average low-temperature is 64.4°F (18°C).

What is the most humid month in Dismal Key?

December is the most humid month, 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 is 76%.

How much does it rain in Dismal Key in December?

In Dismal Key, in December, it is raining for 7.9 days, with typically 0.87" (22mm) of accumulated precipitation.

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

The month with the shortest days in Dismal Key, Florida, is December, with an average of 10.5h of daylight.

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

In December, the average length of the day in Dismal Key is 10.5h.

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

The month with the least sunshine in Dismal Key is December, with an average of 6.7h of sunshine.

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

The average sunshine in December is 6.7h.

How high is the UV index in December in Dismal Key?

In December, the average daily maximum UV index is 6. A UV Index reading of 6 to 7 represents a high hazard to health from the exposure to the Sun's UV rays.
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: 30.08"

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

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: 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: 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: 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: 10.5h

The month with the longest days is June (Average daylight: 13.7h).
The month with the shortest days is December (Average daylight: 10.5h).

  • Average sunshine in December: 6.7h

Months with the most sunshine are May and July (Average sunshine: 11.1h).
The month with the least sunshine is December (Average sunshine: 6.7h).

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: 6

Months with the highest UV index are May, June, July, August and September (UV index 7).
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: 27

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

Average visibility in December - Dismal 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).