December weather forecast
Keller, TX

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Weather in December

The first month of the winter, December, is still a refreshing month in Keller, Texas, with temperature in the range of an average low of 40.6°F (4.8°C) and an average high of 55.4°F (13°C).

Temperature

As December arrives, Keller's weather displays a decrease in high-temperatures, transitioning from November's 64.6°F (18.1°C) to a still refreshing 55.4°F (13°C). Throughout December, an average low-temperature of 40.6°F (4.8°C) is experienced in Keller.

Humidity

In December, the average relative humidity in Keller is 67%.

Rainfall

The month with the least rainfall is December, when the rain falls for 5.5 days and typically collects 0.55" (14mm) of precipitation.

Snowfall

February, March and December are months with snowfall in Keller. December is the first month it typically snows in Keller. Throughout December, in the average 0.4 snowfall days, it receives 0.04" (1mm) of snow. In Keller, during the entire year, snow falls for 1.4 days and aggregates up to 0.39" (10mm) of snow.

Daylight

With an average of 10h and 0min of daylight, December has the shortest days of the year.
On the first day of December, sunrise is at 7:14 am and sunset at 5:22 pm. On the last day of the month, sunrise is at 7:31 am and sunset at 5:32 pm CST.

Sunshine

December has the least sunshine of the year in Keller, with an average of 5.7h of sunshine.

UV index

January and December, with an average maximum UV index of 3, are months with the lowest UV index in Keller. 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: The daily high UV index of 3 in December translates into this advice:
Preventative actions are necessary - Recommendations to ward off sunburn are given. Midday Sun has the strongest UV rays, making it crucial to limit exposure and find shade. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation. Take precaution! The reflection from snow can almost double the UV radiation of the Sun.
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Frequently asked questions

What are the temperatures in Keller in December?

In Keller, 55.4°F (13°C) is the average high-temperature and 40.6°F (4.8°C) is the average low-temperature during December. The average heat index (a.k.a. 'real feel', 'felt air temperature'), which combines relative humidity and air temperature, in September is calculated to be 95°F (35°C).

What is the average humidity in December in Keller?

The average relative humidity in December in Keller is 67%.

What is the driest month in Keller?

December is the month with the least rainfall in Keller, Texas. Rain falls for 5.5 days and accumulates 0.55" (14mm) of precipitation.

How many days does it rain in December in Keller?

In December, in Keller, Texas, the rain falls for 5.5 days. Throughout December, 0.55" (14mm) of precipitation is accumulated.

When does it start to snow in Keller?

December is the first month it typically snows. Throughout December, in the average 0.4 snowfall days, it receives 0.04" (1mm) of snow.

What is the month with the shortest days in Keller?

The month with the shortest days in Keller, Texas, is December, with an average of 10h and 0min of daylight.

How many hours of daylight does Keller have in December?

In Keller, Texas, the average day length in December is 10h and 1min.

When are sunrise and sunset in December in Keller?

In December, on the first day of the month, sunrise is at 7:14 am and sunset at 5:22 pm. On the last day of the month, in Keller, Texas, sunrise is at 7:31 am and sunset at 5:32 pm CST.

What is the month with the least sunshine in Keller?

With an average of 5.7h of sunshine, December has the least sunshine of the year in Keller, Texas.

How many hours of sunshine does Keller have in December?

The average sunshine duration in December in Keller is 5.7h.

When is the lowest UV index in Keller?

The months with the lowest UV index are January and December, with an average maximum UV index of 3.

What is the UV index intensity in December in Keller?

The average daily maximum UV index in December in Keller, Texas, is 3. A UV Index reading of 3 to 5 represents a medium health risk from unsafe 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
Keller, TX

Average temperature in December - Keller, TX
  • Average high temperature in December: 55.4°F

The warmest month (with the highest average high temperature) is August (95.9°F).
The month with the lowest average high temperature is January (54.5°F).

  • Average low temperature in December: 40.6°F

The months with the highest average low temperature are July and August (75.7°F).
The coldest month (with the lowest average low temperature) is January (38.3°F).

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Average pressure in December
Keller, TX

Average pressure in December - Keller, TX
  • Average pressure in December: 30.13"Hg

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).

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Average wind speed in December
Keller, TX

Average wind speed in December - Keller, TX
  • Average wind speed in December: 8.8mph

The windiest month (with the highest average wind speed) is April (10.4mph).
The calmest month (with the lowest average wind speed) is September (6.8mph).

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Average humidity in December
Keller, TX

Average humidity in December - Keller, TX
  • Average humidity in December: 67%

The month with the highest relative humidity is May (73%).
The month with the lowest relative humidity is August (55%).

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Average rainfall in December
Keller, TX

Average rainfall in December - Keller, TX
  • Average rainfall in December: 0.55"

The wettest month (with the highest rainfall) is May (2.09").
The driest month (with the least rainfall) is December (0.55").

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Average rainfall days in December
Keller, TX

Average rainfall days in December - Keller, TX
  • Average rainfall days in December: 5.5 days

The month with the highest number of rainy days is May (11.9 days).
The month with the least rainy days is January (4 days).

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Average snowfall in December
Keller, TX

Average snowfall in December - Keller, TX
  • Average snowfall in December: 0.04"

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

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Average snowfall days in December
Keller, TX

Average snowfall days in December - Keller, TX
  • Average snowfall days in December: 0.4 days

The month with the highest number of snowfall days is February (0.8 days).
The months with the least snowfall days are January, April, May, June, July, August, September and October (0 days).

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

Average daylight in December / Average sunshine in December - Keller, TX
  • Average daylight in December: 10h and 0min

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

  • Average sunshine in December: 5h and 4min

The month with the most sunshine is July (Average sunshine: 11h and 6min).
The month with the least sunshine is December (Average sunshine: 5h and 42min).

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Average sunshine days in December
Keller, TX

Average sunshine days in December - Keller, TX
  • Average sunshine days in December: 24.3 days

The month with the most sunshine days is January (26.2 days).
The month with the least sunshine days is May (15.9 days).

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Average UV index in December
Keller, TX

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

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

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Average cloud cover in December
Keller, TX

Average cloud cover in December - Keller, TX
  • Average cloud cover in December: 35

The month with the most cloud cover is March (Cloud cover 38).
The month with the least cloud cover is August (Cloud cover 19).

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Average visibility in December
Keller, TX

Average visibility in December - Keller, 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).

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Keller, Texas, USA

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