Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average sea temperature in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
Weather in December
Temperature
The arrival of December coincides with an average high-temperature of a still moderately hot 74.5°F (23.6°C), indicating a minimal shift from November's 77.2°F (25.1°C). Sewall's Point's temperature in December lowers to a consistent average of 65.3°F (18.5°C) during the nights.Humidity
The average relative humidity in December is 76%.Rainfall
In December, the rain falls for 9.3 days. Throughout December, 0.71" (18mm) of precipitation is accumulated. Throughout the year, there are 168.1 rainfall days, and 14.09" (358mm) of precipitation is accumulated.Ocean temperature
In December, the average ocean temperature is 75.6°F (24.2°C).Note: For someone not comfortable with cold, swimming in 75.6°F (24.2°C) waters might be a stretch. However, with favorable conditions like abundant sunshine, mild wind, and warm air temperatures, the experience can be improved. And while wetsuits are not a must, they can be considered.
Daylight
December has the shortest days of the year, with an average of 10h and 30min of daylight.On the first day of the month, sunrise is at 6:53 am and sunset at 5:26 pm. On the last day of December, sunrise is at 7:10 am and sunset at 5:37 pm EST.
Sunshine
January and December, with an average of 6.1h of sunshine, are months with the least sunshine.UV index
January and December, with an average maximum UV index of 5, are months with the lowest UV index. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV rays for average individuals.Note: In December, the UV index of 5 transforms into the following advice:
Make use of precautions - It is urged to ward off sun damage. Around midday, solar radiation is most harmful; hence, exposure should be limited. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses. Be wary! Reflections from sand and water make UV radiation more intense.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average December temperature?
What is the average humidity in December?
How many days does it rain in December in Sewall's Point?
What is the ocean temperature in December?
What is the month with the shortest days?
How many hours of daylight does Sewall's Point have in December?
What time are sunrise and sunset in December?
What are the months with the least sunshine?
How long on average sun shines in December in Sewall's Point?
When is the lowest UV index?
How high is the UV index in December?
Average temperature in December
Sewall's Point, FL
- Average high temperature in December: 74.5°F
The warmest month (with the highest average high temperature) is August (87.1°F).
The month with the lowest average high temperature is January (71.4°F).
- Average low temperature in December: 65.3°F
The month with the highest average low temperature is August (79.3°F).
The coldest month (with the lowest average low temperature) is January (61.2°F).
Average pressure in December
Sewall's Point, FL
- Average pressure in December: 30.09"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is September (29.96"Hg).
Average wind speed in December
Sewall's Point, FL
- Average wind speed in December: 9.9mph
The windiest months (with the highest average wind speed) are January, March and November (10.3mph).
The calmest month (with the lowest average wind speed) is July (7.1mph).
Average humidity in December
Sewall's Point, FL
- Average humidity in December: 76%
The months with the highest relative humidity are June and August (78%).
The month with the lowest relative humidity is March (70%).
Average rainfall in December
Sewall's Point, FL
- Average rainfall in December: 0.71"
The wettest month (with the highest rainfall) is August (2.56").
The driest month (with the least rainfall) is January (0.39").
Average rainfall days in December
Sewall's Point, FL
- Average rainfall days in December: 9.3 days
The month with the highest number of rainy days is August (23.1 days).
The month with the least rainy days is February (7.7 days).
Average sea temperature in December
Sewall's Point, FL
- Average sea temperature in December: 75.6°F
The best month for swimming (with the highest average sea temperature) is August (85.1°F).
The coldest month (with the lowest average sea temperature) is February (73.3°F).
Average daylight in December /
Average sunshine in December
Sewall's Point, 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 months with the most sunshine are July and August (Average sunshine: 10h and 54min).
The months with the least sunshine are January and December (Average sunshine: 6h and 6min).
Average sunshine days in December
Sewall's Point, FL
- Average sunshine days in December: 17.8 days
The month with the most sunshine days is January (19.5 days).
The month with the least sunshine days is August (3.4 days).
Average UV index in December
Sewall's Point, FL
- Average UV index in December: 5
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 December (UV index 5).
Average cloud cover in December
Sewall's Point, FL
- Average cloud cover in December: 34
The months with the most cloud cover are January, November and December (Cloud cover 34).
The months with the least cloud cover are May and July (Cloud cover 26).
Average visibility in December
Sewall's Point, 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).
Sewall's Point, Florida, USA
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