December weather forecastTreasure Island, FL
December
Weather in December
December, being the coolest month, presents temperatures fluctuating between 61°F (16.1°C) and 70.7°F (21.5°C). The climate remains agreeable in comparison to more frigid regions of the United States. This period witnesses the least daylight hours, giving the island a softer, more gentle ambiance. Rainfall remains relatively low with about 6.5 days of showers, maintaining the trend of Florida’s dry winters. The sea too cools down substantially, marking the it as the month with the lowest sea temperatures. Yet, the wind retains its charm, blowing at an average speed of 9.5mph (15.3km/h)—adding a gentle chill in the air.Temperature
December ushers in an average high-temperature of a pleasant 70.7°F (21.5°C), aligning closely with the preceding month. The average nighttime temperature lowers to a refreshing 61°F (16.1°C) throughout December.Humidity
The most humid month is December, with an average relative humidity of 77%.Rainfall
In Treasure Island, during December, the rain falls for 6.5 days and regularly aggregates up to 0.67" (17mm) of precipitation. Throughout the year, there are 122.3 rainfall days, and 9.45" (240mm) of precipitation is accumulated.Ocean temperature
In Treasure Island, the average seawater temperature in December is 68.5°F (20.3°C).Note: For the majority, swimming in 68.5°F (20.3°C) does not offer a pleasant experience. Below 69.8°F (21°C), the difficulty in controlling breathing escalates.
Daylight
With an average of 10h and 24min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 7:05 am and sunset at 5:35 pm. On the last day of December, sunrise is at 7:21 am and sunset at 5:46 pm EST.
Sunshine
The month with the least sunshine is December, with an average of 6.6h of sunshine.UV index
In Treasure Island, the average daily maximum UV index in December is 5. A UV Index of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV rays for the ordinary person.Note: In December, the average maximum UV index of 5 translates into the following recommendations:
Exercise caution. Those with pale skin may experience burns in less than half an hour. It's crucial to reduce time in the direct Sun around mid-day due to the intense solar radiation. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Treasure Island, FL
- Average high temperature in December: 70.7°F
The warmest month (with the highest average high temperature) is August (87.8°F).
The month with the lowest average high temperature is January (66.7°F).
- Average low temperature in December: 61°F
The month with the highest average low temperature is August (80.6°F).
The coldest month (with the lowest average low temperature) is January (56.3°F).
Average pressure in December
Treasure Island, FL
- Average pressure in December: 30.1"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is September (29.96"Hg).
Average wind speed in December
Treasure Island, FL
- Average wind speed in December: 9.5mph
The windiest months (with the highest average wind speed) are January and November (9.9mph).
The calmest month (with the lowest average wind speed) is July (7mph).
Average humidity in December
Treasure Island, FL
- Average humidity in December: 77%
The month with the highest relative humidity is December (77%).
The month with the lowest relative humidity is October (72%).
Average rainfall in December
Treasure Island, FL
- Average rainfall in December: 0.67"
The wettest month (with the highest rainfall) is August (1.85").
The driest month (with the least rainfall) is March (0.12").
Average rainfall days in December
Treasure Island, FL
- Average rainfall days in December: 6.5 days
The month with the highest number of rainy days is August (18.5 days).
The months with the least rainy days are January, February and March (5.6 days).
Average sea temperature in December
Treasure Island, FL
- Average sea temperature in December: 68.6°F
The best month for swimming (with the highest average sea temperature) is August (86.7°F).
The coldest month (with the lowest average sea temperature) is January (64°F).
Average daylight in December /
Average sunshine in December
Treasure Island, 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 36min
The month with the most sunshine is May (Average sunshine: 11h and 18min).
The month with the least sunshine is December (Average sunshine: 6h and 36min).
Average sunshine days in December
Treasure Island, FL
- Average sunshine days in December: 22.6 days
The month with the most sunshine days is March (24.3 days).
The month with the least sunshine days is August (5.6 days).
Average UV index in December
Treasure Island, 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 month with the lowest UV index is January (UV index 4).
Average cloud cover in December
Treasure Island, FL
- Average cloud cover in December: 29
The months with the most cloud cover are January and December (Cloud cover 29).
The month with the least cloud cover is May (Cloud cover 20).
Average visibility in December
Treasure Island, 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).
