December weather forecast
Crystal River, FL

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A few people on the clear and pebbly shores of the Crystal River in Florida, swimming with manatees under the hot summer sun
A few people on the clear and pebbly shores of the Crystal River in Florida, swimming with manatees under the hot summer sun

Weather in December

The first month of the winter, December, is still a pleasant month in Crystal River, Florida, with an average temperature varying between 54.7°F (12.6°C) and 69.4°F (20.8°C).

Temperature

Crystal River marks the arrival of December with an average high-temperature of an agreeable 69.4°F (20.8°C), hardly different from November's 73.8°F (23.2°C). Crystal River observes an average nighttime low-temperature of 54.7°F (12.6°C) during the month of December.

Humidity

In Crystal River, Florida, the average relative humidity in December is 77%.

Rainfall

In Crystal River, during December, the rain falls for 8.8 days and regularly aggregates up to 2.72" (69mm) of precipitation. In Crystal River, during the entire year, the rain falls for 178.4 days and collects up to 34.06" (865mm) of precipitation.

Snowfall

February through December are months without snowfall in Crystal River.

Ocean temperature

In Crystal River, in December, the average water temperature is 73.4°F (23°C).
Note: For someone not comfortable with cold, swimming in 73.4°F (23°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

With an average of 10h and 18min of daylight, December has the shortest days of the year.
On the first day of the month, sunrise is at 7:06 am and sunset at 5:32 pm. On the last day of December, sunrise is at 7:23 am and sunset at 5:43 pm EST.

Sunshine

December has the least sunshine of the year, with an average of 6.3h of sunshine.

UV index

The average daily maximum UV index in December in Crystal River is 5. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for the ordinary person.
Note: During December, 5 as the daily maximum UV index converts into the following advice:
Proceed with care. Light skin individuals may be exposed to burns in fewer than 30 minutes. The Sun is at its harshest during midday; protect yourself by staying in shaded areas and minimizing exposure. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized. Be vigilant! The Sun's UV rays get a boost from sand and water reflections.
Updated: Feb 10, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are December temperatures in Crystal River?

An average high-temperature, in December, in Crystal River, is 69.4°F (20.8°C) and the average low-temperature is 54.7°F (12.6°C). The average heat index (a.k.a. 'real feel', 'felt air temperature'), which factors the actual air temperature with the relative humidity, in October is calculated to be 86°F (30°C).

What is the average humidity in December in Crystal River?

The average relative humidity in December in Crystal River, Florida, is 77%.

How much does it rain in Crystal River in December?

In Crystal River, Florida, in December, it is raining for 8.8 days, with typically 2.72" (69mm) of accumulated precipitation.

When it does not snow in Crystal River?

In Crystal River, snow does not fall in February through December.

Does it snow in Crystal River in December?

In Crystal River, in December, it doesn't snow. In January, it regularly snows.

How warm is the water in December in Crystal River?

In Crystal River, in December, the average water temperature is 73.4°F (23°C). A person's cold intolerance, with sunshine, wind, and air temperature, are essential factors for enjoying swimming in 73.4°F (23°C) water.

What is the month with the shortest days in Crystal River?

The month with the shortest days in Crystal River is December, with an average of 10h and 18min of daylight.

What is the average length of the day in December in Crystal River?

In Crystal River, Florida, the average day length in December is 10h and 20min.

What time are sunrise and sunset in December in Crystal River?

On the first day of December in Crystal River, Florida, sunrise is at 7:06 am and sunset at 5:32 pm. On the last day of the month, sunrise is at 7:23 am and sunset at 5:43 pm EST.

What is the month with the least sunshine in Crystal River?

The month with the least sunshine in Crystal River, Florida, is December, with an average of 6.3h of sunshine.

How many hours of sunshine does Crystal River have in December?

In December, the average sunshine duration in Crystal River is 6.3h.

What is the UV index reading in December in Crystal River?

The average daily maximum UV index in December in Crystal River, Florida, is 5. A UV Index estimate of 3 to 5 represents a medium hazard to health from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in December
Crystal River, FL

Average temperature in December - Crystal River, FL
  • Average high temperature in December: 69.4°F

The warmest month (with the highest average high temperature) is August (89.2°F).
The month with the lowest average high temperature is January (65.3°F).

  • Average low temperature in December: 54.7°F

The month with the highest average low temperature is August (77.2°F).
The coldest month (with the lowest average low temperature) is January (49.6°F).

Average pressure in December
Crystal River, FL

Average pressure in December - Crystal River, FL
  • Average pressure in December: 30.11"Hg

The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is September (29.97"Hg).

Average wind speed in December
Crystal River, FL

Average wind speed in December - Crystal River, FL
  • Average wind speed in December: 6.8mph

The windiest months (with the highest average wind speed) are March and April (7.6mph).
The calmest month (with the lowest average wind speed) is July (5.7mph).

Average humidity in December
Crystal River, FL

Average humidity in December - Crystal River, FL
  • Average humidity in December: 77%

The month with the highest relative humidity is September (78%).
The months with the lowest relative humidity are January, March and May (73%).

Average rainfall in December
Crystal River, FL

Average rainfall in December - Crystal River, FL
  • Average rainfall in December: 2.72"

The wettest month (with the highest rainfall) is August (5.51").
The driest month (with the least rainfall) is March (1.26").

Average rainfall days in December
Crystal River, FL

Average rainfall days in December - Crystal River, FL
  • Average rainfall days in December: 8.8 days

The month with the highest number of rainy days is August (26.9 days).
The month with the least rainy days is November (8.7 days).

Average snowfall days in December
Crystal River, FL

Average snowfall days in December - Crystal River, FL
  • Average snowfall days in December: 0 days

The month with the highest number of snowfall days is January (0.1 days).
The months with the least snowfall days are February, March, April, May, June, July, August, September, October, November and December (0 days).

Average sea temperature in December
Crystal River, FL

Average sea temperature in December - Crystal River, FL
  • Average sea temperature in December: 73°F

The best month for swimming (with the highest average sea temperature) is August (86°F).
The coldest months (with the lowest average sea temperature) are February and March (68°F).

Average daylight in December /
Average sunshine in December
Crystal River, FL

Average daylight in December / Average sunshine in December - Crystal River, FL
  • Average daylight in December: 10h and 2min

The month with the longest days is June (Average daylight: 14h and 0min).
The month with the shortest days is December (Average daylight: 10h and 18min).

  • Average sunshine in December: 6h and 2min

The month with the most sunshine is May (Average sunshine: 11h and 0min).
The month with the least sunshine is December (Average sunshine: 6h and 18min).

Average sunshine days in December
Crystal River, FL

Average sunshine days in December - Crystal River, FL
  • Average sunshine days in December: 19.3 days

The month with the most sunshine days is January (20.8 days).
The month with the least sunshine days is August (2.1 days).

Average UV index in December
Crystal River, FL

Average UV index in December - Crystal River, 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
Crystal River, FL

Average cloud cover in December - Crystal River, FL
  • Average cloud cover in December: 34

The months with the most cloud cover are February and December (Cloud cover 34).
The month with the least cloud cover is May (Cloud cover 24).

Average visibility in December
Crystal River, FL

Average visibility in December - Crystal River, 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).

Crystal River, Florida, USA

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