December weather forecastSebastian, FL
December
Weather in December
December, the first month of the winter in Sebastian, is still a pleasant month, with temperature in the range of an average high of 73°F (22.8°C) and an average low of 64°F (17.8°C).Temperature
An average high-temperature of a pleasant 73°F (22.8°C) marks December, exhibiting a close resemblance to the conditions in November. In Sebastian, a slight decrease from the daytime peak is noted during the month of December, with an average low-temperature of 64°F (17.8°C).Humidity
In Sebastian, the average relative humidity in December is 77%.Rainfall
In December, in Sebastian, the rain falls for 13.3 days. Throughout December, 1.61" (41mm) of precipitation is accumulated. In Sebastian, Florida, during the entire year, the rain falls for 205.2 days and collects up to 38.31" (973mm) of precipitation.Daylight
The month with the shortest days in Sebastian is December, with an average of 10h and 24min of daylight.On the first day of December, sunrise is at 6:56 am and sunset at 5:26 pm. On the last day of the month, sunrise is at 7:12 am and sunset at 5:37 pm EST.
Sunshine
The average sunshine in December is 6.1h.UV index
The months with the lowest UV index in Sebastian are January, February and December, with an average maximum UV index of 5. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV rays for the average person.Note: The UV index of 5 in December translates into these instructions:
Be vigilant - Suggestions to stave off sun damage are provided. Avoid the Sun's strongest UV rays by seeking shade and limiting exposure during midday. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Sebastian, FL
- Average high temperature in December: 73°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 (69.4°F).
- Average low temperature in December: 64°F
The month with the highest average low temperature is August (79°F).
The coldest month (with the lowest average low temperature) is January (59.7°F).
Average pressure in December
Sebastian, FL
- Average pressure in December: 30.1"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
Sebastian, FL
- Average wind speed in December: 10mph
The windiest month (with the highest average wind speed) is November (10.6mph).
The calmest month (with the lowest average wind speed) is July (7.2mph).
Average humidity in December
Sebastian, FL
- Average humidity in December: 77%
The months with the highest relative humidity are June, July and August (79%).
The month with the lowest relative humidity is March (72%).
Average rainfall in December
Sebastian, FL
- Average rainfall in December: 1.61"
The wettest month (with the highest rainfall) is August (6.89").
The driest month (with the least rainfall) is February (1.06").
Average rainfall days in December
Sebastian, FL
- Average rainfall days in December: 13.3 days
The month with the highest number of rainy days is August (25 days).
The month with the least rainy days is February (10.4 days).
Average daylight in December /
Average sunshine in December
Sebastian, FL
- Average daylight in December: 10h and 24min
The month with the longest days is June (Average daylight: 13h and 54min).
The month with the shortest days is December (Average daylight: 10h and 24min).
- Average sunshine in December: 6h and 6min
The month with the most sunshine is July (Average sunshine: 10h and 54min).
The month with the least sunshine is January (Average sunshine: 5h and 54min).
Average sunshine days in December
Sebastian, FL
- Average sunshine days in December: 12.9 days
The month with the most sunshine days is January (16.8 days).
The month with the least sunshine days is August (3.9 days).
Average UV index in December
Sebastian, 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, February and December (UV index 5).
Average cloud cover in December
Sebastian, FL
- Average cloud cover in December: 35
The month with the most cloud cover is November (Cloud cover 36).
The months with the least cloud cover are May, July and August (Cloud cover 27).
Average visibility in December
Sebastian, 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).
