December weather forecast
Keystone Heights, FL

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Weather in December

December, the first month of the winter in Keystone Heights, is still a pleasant month, with an average temperature ranging between min 51.4°F (10.8°C) and max 68.4°F (20.2°C).

Temperature

Keystone Heights's weather in December, with an average high-temperature of a still agreeable 68.4°F (20.2°C), subtly shifts from November's 73°F (22.8°C). An average nighttime temperature of 51.4°F (10.8°C) is noted during the month of December.

Humidity

The average relative humidity in December is 77%.

Rainfall

In Keystone Heights, in December, during 10.9 rainfall days, 2.24" (57mm) of precipitation is typically accumulated. Throughout the year, there are 188.6 rainfall days, and 33.5" (851mm) of precipitation is accumulated.

Snowfall

The only month with snowfall is December. The month with the most snowfall days is December, when snow falls for 0.1 days.

Daylight

The month with the shortest days is December, with an average of 10h and 18min of daylight.
On the first day of December, sunrise is at 7:06 am and sunset at 5:28 pm. On the last day of the month, sunrise is at 7:23 am and sunset at 5:39 pm EST.

Sunshine

With an average of 5.9h of sunshine, December has the least sunshine of the year.

UV index

The months with the lowest UV index are January and December, with an average maximum UV index of 4. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for average individuals.
Note: In December, a daily UV index of 4 turns into the following recommendations:
Take precautions - Protection against sun damage is advised. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage. Be alert! Nearly double the UV rays from the Sun can be reflected by snow.

Frequently asked questions

What are the temperatures in December?

The high-temperature, in December, in Keystone Heights, records 68.4°F (20.2°C), while the low-temperature is 51.4°F (10.8°C). In October, the average heat index (a.k.a. 'feels like', 'felt air temperature'), which takes the relative humidity and factors it into the air temperature reading, is evaluated at 86°F (30°C).

What is the average humidity in December?

The average relative humidity in December is 77%.

How much does it rain in December?

In Keystone Heights, in December, it is raining for 10.9 days, with typically 2.24" (57mm) of accumulated precipitation.

What is the snowiest month?

December has the most snowfall days of the year. Snow falls for 0.1 days.

When does it start snowing?

December is the first month it typically snows. Throughout December, there are 0.1 snowfall days.

What is the month with the shortest days?

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

What is the average length of the day in December?

In December, the average day length in Keystone Heights is 10h and 16min.

When are sunrise and sunset in December?

On the first day of December, sunrise is at 7:06 am and sunset at 5:28 pm. On the last day of the month, sunrise is at 7:23 am and sunset at 5:39 pm EST.

What is the month with the least sunshine?

The month with the least sunshine is December, with an average of 5.9h of sunshine.

How many hours of sunshine does Keystone Heights have in December?

The average sunshine duration in December is 5.9h.

What are the months with the lowest UV index?

January and December, with an average maximum UV index of 4, are months with the lowest UV index.

How high is the UV index in December in Keystone Heights?

In December, the average daily maximum UV index is 4. A UV Index estimate of 3 to 5 represents a moderate health threat 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
Keystone Heights, FL

Average temperature in December - Keystone Heights, FL
  • Average high temperature in December: 68.4°F

The warmest month (with the highest average high temperature) is July (91°F).
The month with the lowest average high temperature is January (64.2°F).

  • Average low temperature in December: 51.4°F

The month with the highest average low temperature is August (74.8°F).
The coldest month (with the lowest average low temperature) is January (46.6°F).

Average pressure in December
Keystone Heights, FL

Average pressure in December - Keystone Heights, FL
  • Average pressure in December: 30.12"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
Keystone Heights, FL

Average wind speed in December - Keystone Heights, FL
  • Average wind speed in December: 5.7mph

The windiest month (with the highest average wind speed) is April (6.3mph).
The calmest month (with the lowest average wind speed) is July (4.5mph).

Average humidity in December
Keystone Heights, FL

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

The months with the highest relative humidity are August and September (78%).
The month with the lowest relative humidity is March (71%).

Average rainfall in December
Keystone Heights, FL

Average rainfall in December - Keystone Heights, FL
  • Average rainfall in December: 2.24"

The wettest month (with the highest rainfall) is July (5.31").
The driest months (with the least rainfall) are January and November (1.5").

Average rainfall days in December
Keystone Heights, FL

Average rainfall days in December - Keystone Heights, FL
  • Average rainfall days in December: 10.9 days

The month with the highest number of rainy days is August (25.9 days).
The month with the least rainy days is November (9 days).

Average snowfall days in December
Keystone Heights, FL

Average snowfall days in December - Keystone Heights, FL
  • Average snowfall days in December: 0.1 days

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

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

Average daylight in December / Average sunshine in December - Keystone Heights, 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: 5h and 5min

The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is December (Average sunshine: 5h and 54min).

Average sunshine days in December
Keystone Heights, FL

Average sunshine days in December - Keystone Heights, FL
  • Average sunshine days in December: 17.5 days

The month with the most sunshine days is January (19.9 days).
The month with the least sunshine days is July (3.6 days).

Average UV index in December
Keystone Heights, FL

Average UV index in December - Keystone Heights, 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 and December (UV index 4).

Average cloud cover in December
Keystone Heights, FL

Average cloud cover in December - Keystone Heights, FL
  • Average cloud cover in December: 40

The month with the most cloud cover is December (Cloud cover 40).
The months with the least cloud cover are May and October (Cloud cover 31).

Average visibility in December
Keystone Heights, FL

Average visibility in December - Keystone Heights, FL
  • Average visibility in December: 5mi

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October and November (6mi).
The month with the lowest visibility is December (5mi).

Keystone Heights, Florida, USA

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