December weather forecast
Riviera Beach, FL

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Weather in December

The first month of the winter, December, is also a moderately hot month in Riviera Beach, Florida, with an average temperature ranging between max 74.8°F (23.8°C) and min 68°F (20°C).

Temperature

December registers an average high-temperature of a still moderately hot 74.8°F (23.8°C), slightly varied from November's 77.5°F (25.3°C). In December, Riviera Beach's nights cool slightly to a consistent average temperature of 68°F (20°C).

Humidity

In December, the average relative humidity in Riviera Beach, Florida, is 75%.

Rainfall

In December, the rain falls for 11.1 days. Throughout December, 0.87" (22mm) of precipitation is accumulated. In Riviera Beach, during the entire year, the rain falls for 193.9 days and collects up to 22.56" (573mm) of precipitation.

Ocean temperature

In December, the average ocean temperature in Riviera Beach is 75.9°F (24.4°C).
Note: For someone sensitive to cold, swimming in 75.9°F (24.4°C) waters can be invigorating, especially when considering elements like sunshine, wind, and current air temperature. (As a reference, Olympic swimming waters are kept between 77°F (25°C) and 82.4°F (28°C).)

Daylight

The month with the shortest days is December, with an average of 10h and 30min of daylight.
On the first day of the month, sunrise is at 6:52 am and sunset at 5:26 pm. On the last day of December, in Riviera Beach, sunrise is at 7:08 am and sunset at 5:38 pm EST.

Sunshine

The months with the least sunshine are January and December, with an average of 6.1h of sunshine.

UV index

The average daily maximum UV index in December is 6. A UV Index of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV rays for the average person.
Note: The maximum daily UV index of 6 during December translates into the following directions:
Skirt overexposure. People with light complexions might get scorched in under 20 minutes. Make an effort to avoid direct sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation, and note that objects like parasols or canopies might not offer full sun protection. Enhance your sun protection with tightly woven, yet airy clothing. Notice! The Sun's UV exposure elevates with sand and water reflections.
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Frequently asked questions

What is the usual temperature for Riviera Beach in December?

The high-temperature, in December, in Riviera Beach, is 74.8°F (23.8°C), while the low-temperature averages to 68°F (20°C). The average heat index (a.k.a. 'real feel', 'apparent temperature'), which combines air temperature and relative humidity, in October is evaluated at 87.8°F (31°C).

What is the average humidity in December in Riviera Beach?

In Riviera Beach, the average relative humidity in December is 75%.

How many days does it rain in December in Riviera Beach?

In Riviera Beach, Florida, in December, during 11.1 rainfall days, 0.87" (22mm) of precipitation is typically accumulated.

What is the water temperature in December in Riviera Beach?

In December, the average ocean temperature in Riviera Beach, Florida, is 75.9°F (24.4°C). Depending on a person's sensitivity to cold, with regards to sunshine, wind, and air temperature, a quick swim in 75.9°F (24.4°C) water may be enjoyable.

What is the month with the shortest days in Riviera Beach?

The month with the shortest days is December, with an average of 10h and 30min of daylight.

What is the average length of the day in December in Riviera Beach?

In Riviera Beach, Florida, the average day length in December is 10h and 29min.

When is the sunrise / sunset in December in Riviera Beach?

On the first day of December in Riviera Beach, Florida, sunrise is at 6:52 am and sunset at 5:26 pm. On the last day of the month, sunrise is at 7:08 am and sunset at 5:38 pm EST.

What is the month with the least sunshine in Riviera Beach?

January and December, with an average of 6.1h of sunshine, are months with the least sunshine in Riviera Beach, Florida.

How many hours of sunshine does Riviera Beach have in December?

In Riviera Beach, Florida, the average sunshine duration in December is 6.1h.

What is the UV index reading in December in Riviera Beach?

In Riviera Beach, the average daily maximum UV index in December is 6. A UV Index reading of 6 to 7 represents a high health vulnerability from exposure to the Sun's 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
Riviera Beach, FL

Average temperature in December - Riviera Beach, FL
  • Average high temperature in December: 74.8°F

The warmest month (with the highest average high temperature) is August (86.5°F).
The month with the lowest average high temperature is January (72°F).

  • Average low temperature in December: 68°F

The month with the highest average low temperature is August (81.3°F).
The coldest month (with the lowest average low temperature) is January (64.2°F).

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Average pressure in December
Riviera Beach, FL

Average pressure in December - Riviera Beach, FL
  • Average pressure in December: 30.09"Hg

The month with the highest atmospheric pressure is January (30.11"Hg).
The months with the lowest atmospheric pressure are September and October (29.96"Hg).

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Average wind speed in December
Riviera Beach, FL

Average wind speed in December - Riviera Beach, FL
  • Average wind speed in December: 11.3mph

The windiest month (with the highest average wind speed) is March (11.8mph).
The calmest month (with the lowest average wind speed) is July (8mph).

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Average humidity in December
Riviera Beach, FL

Average humidity in December - Riviera Beach, FL
  • Average humidity in December: 75%

The month with the highest relative humidity is June (76%).
The month with the lowest relative humidity is March (70%).

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Average rainfall in December
Riviera Beach, FL

Average rainfall in December - Riviera Beach, FL
  • Average rainfall in December: 0.87"

The wettest month (with the highest rainfall) is August (4.13").
The driest month (with the least rainfall) is January (0.51").

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Average rainfall days in December
Riviera Beach, FL

Average rainfall days in December - Riviera Beach, FL
  • Average rainfall days in December: 11.1 days

The month with the highest number of rainy days is September (25 days).
The month with the least rainy days is February (9.3 days).

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Average sea temperature in December
Riviera Beach, FL

Average sea temperature in December - Riviera Beach, FL
  • Average sea temperature in December: 76°F

The best month for swimming (with the highest average sea temperature) is August (85.7°F).
The coldest month (with the lowest average sea temperature) is January (74.1°F).

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Average daylight in December /
Average sunshine in December
Riviera Beach, FL

Average daylight in December / Average sunshine in December - Riviera Beach, 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 1min

The month with the most sunshine is July (Average sunshine: 11h and 0min).
The months with the least sunshine are January and December (Average sunshine: 6h and 6min).

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Average sunshine days in December
Riviera Beach, FL

Average sunshine days in December - Riviera Beach, FL
  • Average sunshine days in December: 16 days

The month with the most sunshine days is January (18.2 days).
The month with the least sunshine days is August (3.5 days).

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Average UV index in December
Riviera Beach, FL

Average UV index in December - Riviera Beach, 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).

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Average cloud cover in December
Riviera Beach, FL

Average cloud cover in December - Riviera Beach, FL
  • Average cloud cover in December: 35

The months with the most cloud cover are January, November and December (Cloud cover 35).
The months with the least cloud cover are May, July and August (Cloud cover 28).

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Average visibility in December
Riviera Beach, FL

Average visibility in December - Riviera Beach, 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).

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Riviera Beach, Florida, USA

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