December weather forecastUpper Grand Lagoon, FL
December
Weather in December
The first month of the winter, December, is still a refreshing month in Upper Grand Lagoon, Florida, with an average temperature fluctuating between 51.8°F (11°C) and 63.5°F (17.5°C).Temperature
With the commencement of December, Upper Grand Lagoon records a moderate temperature decline, with the average high easing from November's pleasant 68.9°F (20.5°C) to a comfortable 63.5°F (17.5°C). An average low-temperature of 51.8°F (11°C) is recorded during the nights in December.Humidity
With an average relative humidity of 77%, December is the most humid month.Rainfall
In Upper Grand Lagoon, during December, the rain falls for 12.4 days and regularly aggregates up to 3.78" (96mm) of precipitation. In Upper Grand Lagoon, during the entire year, the rain falls for 166.1 days and collects up to 35.83" (910mm) of precipitation.Snowfall
In Upper Grand Lagoon, snow does not fall in February, April through December.Ocean temperature
In Upper Grand Lagoon, the average seawater temperature in December is 66.9°F (19.4°C).Note: For most people, swimming in water at 66.9°F (19.4°C) is not a pleasurable experience. Breathing control gets harder as the water temperature descends from 69.8°F (21°C) to 59°F (15°C).
Daylight
With an average of 10h and 12min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 6:22 am and sunset at 4:42 pm. On the last day of December, sunrise is at 6:39 am and sunset at 4:53 pm CST.
Sunshine
The average sunshine in December is 5.8h.UV index
The months with the lowest UV index in Upper Grand Lagoon are January, February and December, with an average maximum UV index of 4. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for average individuals.Note: In December, a regular UV index of 4 translates into these guidelines:
Be mindful. Those with pale skin might receive burns in fewer than 30 minutes. The Sun is most powerful around mid-day, so it's a good practice to reduce direct exposure. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Upper Grand Lagoon, FL
- Average high temperature in December: 63.5°F
The warmest month (with the highest average high temperature) is August (88.3°F).
The month with the lowest average high temperature is January (60.1°F).
- Average low temperature in December: 51.8°F
The month with the highest average low temperature is July (78.6°F).
The coldest month (with the lowest average low temperature) is January (47.7°F).
Average pressure in December
Upper Grand Lagoon, FL
- Average pressure in December: 30.13"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The months with the lowest atmospheric pressure are June, August and September (29.98"Hg).
Average wind speed in December
Upper Grand Lagoon, FL
- Average wind speed in December: 8.7mph
The windiest month (with the highest average wind speed) is January (9.2mph).
The calmest month (with the lowest average wind speed) is August (6.5mph).
Average humidity in December
Upper Grand Lagoon, 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 (71%).
Average rainfall in December
Upper Grand Lagoon, FL
- Average rainfall in December: 3.78"
The wettest month (with the highest rainfall) is August (5.04").
The driest month (with the least rainfall) is November (1.69").
Average rainfall days in December
Upper Grand Lagoon, FL
- Average rainfall days in December: 12.4 days
The month with the highest number of rainy days is August (23.8 days).
The month with the least rainy days is November (7.9 days).
Average snowfall days in December
Upper Grand Lagoon, FL
- Average snowfall days in December: 0 days
The months with the highest number of snowfall days are January and March (0.1 days).
The months with the least snowfall days are February, April, May, June, July, August, September, October, November and December (0 days).
Average sea temperature in December
Upper Grand Lagoon, FL
- Average sea temperature in December: 66.9°F
The best month for swimming (with the highest average sea temperature) is August (86°F).
The coldest month (with the lowest average sea temperature) is February (62.9°F).
Average daylight in December /
Average sunshine in December
Upper Grand Lagoon, FL
- Average daylight in December: 10h and 12min
The month with the longest days is June (Average daylight: 14h and 6min).
The month with the shortest days is December (Average daylight: 10h and 12min).
- Average sunshine in December: 5h and 48min
The months with the most sunshine are May and June (Average sunshine: 11h and 6min).
The month with the least sunshine is February (Average sunshine: 5h and 42min).
Average sunshine days in December
Upper Grand Lagoon, FL
- Average sunshine days in December: 17.1 days
The month with the most sunshine days is November (21 days).
The month with the least sunshine days is August (5.7 days).
Average UV index in December
Upper Grand Lagoon, FL
- Average UV index in December: 4
The months with the highest UV index are May, June, July and August (UV index 7).
The months with the lowest UV index are January, February and December (UV index 4).
Average cloud cover in December
Upper Grand Lagoon, FL
- Average cloud cover in December: 38
The month with the most cloud cover is December (Cloud cover 38).
The months with the least cloud cover are May and October (Cloud cover 22).
Average visibility in December
Upper Grand Lagoon, 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).
