December weather forecast and climate
Keystone, FL

Weather in December

The first month of the winter, December, is still a pleasant month in Keystone, Florida, with average temperature fluctuating between 70.2°F (21.2°C) and 59.4°F (15.2°C).

Temperature

In Keystone, the average high-temperature is essentially the same as in November - a pleasant 70.2°F (21.2°C). The average low-temperature, in December, is 59.4°F (15.2°C).

Humidity

December is the most humid month, with an average relative humidity of 77%.

Rainfall

In December, in Keystone, Florida, the rain falls for 6.5 days. Throughout December, 0.94" (24mm) of precipitation is accumulated. In Keystone, during the entire year, the rain falls for 120.5 days and collects up to 9.45" (240mm) of precipitation.

Daylight

The month with the shortest days is December, with an average of 10.4h of daylight.

Sunshine

The month with the least sunshine is December, with an average of 6.5h of sunshine.

UV index

The average daily maximum UV index in December is 5. A UV Index of 3 to 5 symbolizes a moderate threat to health from the exposure to the Sun's UV radiation for average individuals.
Note: The average daily UV index of 5 in December transform into the following instructions:
Take precautions - Protection against sunburn is recommended. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
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FAQ

What is the most humid month in Keystone?

With an average relative humidity of 77%, December is the most humid month in Keystone.

What is the average humidity in December in Keystone?

The average relative humidity in December in Keystone is 77%.

How much does it rain in Keystone in December?

In Keystone, Florida, during December, the rain falls for 6.5 days and regularly aggregates up to 0.94" (24mm) of precipitation.

What is the month with the shortest days in Keystone?

December has the shortest days of the year in Keystone, Florida, with an average of 10.4h of daylight.

What is the average length of the day in December in Keystone?

In Keystone, the average length of the day in December is 10.4h.

What is the month with the least sunshine in Keystone?

December has the least sunshine of the year, with an average of 6.5h of sunshine.

How long on average sun shines in December in Keystone?

In Keystone, Florida, the average sunshine in December is 6.5h.

What is the UV index intensity in December in Keystone?

The average daily maximum UV index in December is 5. A UV Index of 3 to 5 symbolizes a medium health risk from the exposure to the Sun's UV rays.

Average temperature in December
Keystone, FL

Average temperature in December - Keystone, FL
  • Average high temperature in December: 70.2°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 (66°F).

  • Average low temperature in December: 59.4°F

The month with the highest average low temperature is August (80.2°F).
The coldest month (with the lowest average low temperature) is January (54.5°F).

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Average pressure in December
Keystone, FL

Average pressure in December - Keystone, FL
  • Average pressure in December: 30.11"

The month with the highest atmospheric pressure is January (30.14").
The month with the lowest atmospheric pressure is September (29.96").

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Average wind speed in December
Keystone, FL

Average wind speed in December - Keystone, FL
  • Average wind speed in December: 8.5mph

The windiest months (with the highest average wind speed) are January, March and April (8.9mph).
The calmest month (with the lowest average wind speed) is July (6.7mph).

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Average humidity in December
Keystone, FL

Average humidity in December - Keystone, FL
  • Average humidity in December: 77%

The month with the highest relative humidity is December (77%).
The month with the lowest relative humidity is May (72%).

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Average rainfall in December
Keystone, FL

Average rainfall in December - Keystone, FL
  • Average rainfall in December: 0.94"

The wettest month (with the highest rainfall) is July (1.77").
The driest month (with the least rainfall) is March (0.2").

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Average rainfall days in December
Keystone, FL

Average rainfall days in December - Keystone, FL
  • Average rainfall days in December: 6.5 days

The month with the highest number of rainy days is August (17.9 days).
The month with the least rainy days is November (5.5 days).

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Average daylight in December /
Average sunshine in December
Keystone, FL

Average daylight in December / Average sunshine in December - Keystone, FL
  • Average daylight in December: 10.4h

The month with the longest days is June (Average daylight: 13.9h).
The month with the shortest days is December (Average daylight: 10.4h).

  • Average sunshine in December: 6.5h

The month with the most sunshine is May (Average sunshine: 11.3h).
The month with the least sunshine is December (Average sunshine: 6.5h).

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Average sunshine days in December
Keystone, FL

Average sunshine days in December - Keystone, FL
  • Average sunshine days in December: 23.3 days

The month with the most sunshine days is January (23.4 days).
The month with the least sunshine days is July (6.7 days).

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Average UV index in December
Keystone, FL

Average UV index in December - Keystone, FL
  • Average UV index in December: 5

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).

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Average cloud cover in December
Keystone, FL

Average cloud cover in December - Keystone, FL
  • Average cloud cover in December: 30

Months with the most cloud cover are January and December (Cloud cover 30).
The month with the least cloud cover is May (Cloud cover 20).

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Average visibility in December
Keystone, FL

Average visibility in December - Keystone, FL
  • Average visibility in December: 6mi

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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