December weather forecast
Killeen, TX

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Weather in December

The weather in Killeen wraps up the year with the arrival of winter in December. Temperatures drop to their annual low, with an average range from 58.6°F (14.8°C) to 43.2°F (6.2°C). Despite being the driest month, December may occasionally experience a slight snowfall of 0.3 days on average. Daylight hours shorten further, giving way to longer nights and cooler days. The city's weather sets a serene and chilly backdrop, perfect for embracing the end of the year festivities.

Temperature

The advent of December brings a subtle shift in temperature, with the average high moving from a refreshing 66.7°F (19.3°C) in November to a moderate 58.6°F (14.8°C). During December, Killeen records a consistent average nighttime temperature of 43.2°F (6.2°C).

Humidity

The average relative humidity in December is 70%.

Rainfall

In Killeen, in December, during 9.5 rainfall days, 1.38" (35mm) of precipitation is typically accumulated. In Killeen, during the entire year, the rain falls for 130.1 days and collects up to 23.07" (586mm) of precipitation.

Snowfall

In Killeen, snow does not fall in March through December.

Daylight

December has the shortest days of the year, with an average of 10h and 12min of daylight.
On the first day of December, sunrise is at 7:12 am and sunset at 5:28 pm. On the last day of the month, sunrise is at 7:29 am and sunset at 5:39 pm CST.

Sunshine

December has the least sunshine of the year, with an average of 5.4h of sunshine.

UV index

With an average maximum UV index of 3, December is the month with the lowest UV index. A UV Index estimate of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: The daily high UV index of 3 in December translates into this advice:
Put precautions into practice - Protective measures against sun-induced damage are advised. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. Opt for tightly woven and loose clothing to enhance protection from the Sun. Bear in mind! The Sun's UV radiation can nearly double in intensity due to the reflective quality of snow.

Frequently asked questions

What is the usual temperature for Killeen in December?

During December, Killeen experiences an average high-temperature of 58.6°F (14.8°C) and a low-temperature of 43.2°F (6.2°C). In September, the average heat index (a.k.a. 'real feel', 'feels like'), which takes the relative humidity and factors it into the air temperature reading, is evaluated at 96.8°F (36°C).

What is the average humidity in December?

In December, the average relative humidity in Killeen is 70%.

How many days does it rain in December?

In Killeen, in December, it is raining for 9.5 days, with typically 1.38" (35mm) of accumulated precipitation.

When it does not snow?

In Killeen, snow does not fall in March through December.

Does it snow in December?

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

What is the month with the shortest days?

With an average of 10h and 12min of daylight, December has the shortest days of the year in Killeen.

How many hours of daylight does Killeen have in December?

In December, the average day length is 10h and 10min.

What time are sunrise and sunset in December?

In December, on the first day of the month, sunrise is at 7:12 am and sunset at 5:28 pm. On the last day of the month, sunrise is at 7:29 am and sunset at 5:39 pm CST.

What is the month with the least sunshine?

With an average of 5.4h of sunshine, December has the least sunshine of the year.

How many hours of sunshine does Killeen have in December?

In Killeen, the average sunshine duration in December is 5.4h.

What is the month with the lowest UV index in Killeen?

December is the month with the lowest UV index, with an average maximum UV index of 3.

What is the UV index reading in December?

In December, the average daily maximum UV index in Killeen is 3. A UV Index value of 3 to 5 symbolizes a medium hazard to health from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in December
Killeen, TX

Average temperature in December - Killeen, TX
  • Average high temperature in December: 58.6°F

The warmest month (with the highest average high temperature) is August (96.3°F).
The month with the lowest average high temperature is January (58.1°F).

  • Average low temperature in December: 43.2°F

The month with the highest average low temperature is August (76.1°F).
The coldest month (with the lowest average low temperature) is January (41.2°F).

Average pressure in December
Killeen, TX

Average pressure in December - Killeen, TX
  • Average pressure in December: 30.12"Hg

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).

Average wind speed in December
Killeen, TX

Average wind speed in December - Killeen, TX
  • Average wind speed in December: 9.2mph

The windiest month (with the highest average wind speed) is March (10.6mph).
The calmest month (with the lowest average wind speed) is September (7.1mph).

Average humidity in December
Killeen, TX

Average humidity in December - Killeen, TX
  • Average humidity in December: 70%

The month with the highest relative humidity is May (74%).
The month with the lowest relative humidity is August (56%).

Average rainfall in December
Killeen, TX

Average rainfall in December - Killeen, TX
  • Average rainfall in December: 1.38"

The wettest month (with the highest rainfall) is October (3.39").
The driest month (with the least rainfall) is November (0.98").

Average rainfall days in December
Killeen, TX

Average rainfall days in December - Killeen, TX
  • Average rainfall days in December: 9.5 days

The month with the highest number of rainy days is September (14.3 days).
The month with the least rainy days is January (6.6 days).

Average snowfall in December
Killeen, TX

Average snowfall in December - Killeen, TX
  • Average snowfall in December: 0"

The month with the highest snowfall is February (0.31").
The months with the least snowfall are March, April, May, June, July, August, September, October, November and December (0").

Average snowfall days in December
Killeen, TX

Average snowfall days in December - Killeen, TX
  • Average snowfall days in December: 0.3 days

The month with the highest number of snowfall days is February (0.9 days).
The months with the least snowfall days are March, April, May, June, July, August, September, October and November (0 days).

Average daylight in December /
Average sunshine in December
Killeen, TX

Average daylight in December / Average sunshine in December - Killeen, TX
  • Average daylight in December: 10h and 1min

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 2min

The month with the most sunshine is July (Average sunshine: 10h and 48min).
The month with the least sunshine is December (Average sunshine: 5h and 24min).

Average sunshine days in December
Killeen, TX

Average sunshine days in December - Killeen, TX
  • Average sunshine days in December: 19.5 days

The month with the most sunshine days is January (22.3 days).
The month with the least sunshine days is September (13.5 days).

Average UV index in December
Killeen, TX

Average UV index in December - Killeen, TX
  • Average UV index in December: 3

The months with the highest UV index are June, July and August (UV index 7).
The month with the lowest UV index is December (UV index 3).

Average cloud cover in December
Killeen, TX

Average cloud cover in December - Killeen, TX
  • Average cloud cover in December: 39

The month with the most cloud cover is March (Cloud cover 42).
The month with the least cloud cover is August (Cloud cover 21).

Average visibility in December
Killeen, TX

Average visibility in December - Killeen, TX
  • 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).

Killeen, Texas, USA

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