December weather forecastRiviera Beach, FL
December
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.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
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).
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).
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).
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%).
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").
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).
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).
Average daylight in December /
Average sunshine in December
Riviera Beach, FL
- Average daylight in December: 10h and 30min
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 6min
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).
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).
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).
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).
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).
