December weather forecast
Houston, TX

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A beautiful park in Root square overlooking the central business district of Houston, Texas, USA
A beautiful park in Root square overlooking the central business district of Houston, Texas, USA

Weather in December

December illuminates Houston with festive lights and celebrations. The bee-hive of activity, coupled with the vibrant decorations, adds a magical touch to the city's wintry landscape. As the final month of the year, December invites residents and visitors alike to savor the joyful atmosphere that envelops the city. Coats and mittens become a common sight as the temperature drops further to as low as 49.6°F (9.8°C). Furthermore, a small amount of snowfall, 0.08" (2mm), can be observed, adding to the authentic winter experience in December.

Temperature

December sees a slight reduction in average high-temperature, with a shift from an agreeable 70.3°F (21.3°C) in November to an enjoyable 63°F (17.2°C). December nights experience a consistent temperature drop to a chilly 49.6°F (9.8°C).

Humidity

In December, the average relative humidity is 76%.

Rainfall

In Houston, in December, it is raining for 13.9 days, with typically 2.52" (64mm) of accumulated precipitation. In Houston, during the entire year, the rain falls for 180.5 days and collects up to 35.35" (898mm) of precipitation.

Snowfall

January and December are months with snowfall. The month with the most snowfall is December, when snow falls for 0.1 days and typically aggregates up to 0.08" (2mm) of snow.

Daylight

With an average of 10h and 18min of daylight, December has the shortest days of the year.
On the first day of December, sunrise is at 6:59 am and sunset at 5:21 pm. On the last day of the month, sunrise is at 7:16 am and sunset at 5:32 pm CST.

Sunshine

December has the least sunshine of the year, with an average of 4.8h of sunshine.

UV index

December is the month with the lowest UV index, with an average maximum UV index of 3. A UV Index value of 3 to 5 symbolizes a moderate health risk from unsafe exposure to UV radiation for the average person.
Note: In December, the average maximum UV index of 3 translates into the following recommendations:
Exercise prudence. Persons with fair skin could be burned in under 30 minutes. Minimize direct exposure to the Sun during midday when its radiation is at its peak. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Be aware! The reflective nature of snow can magnify the Sun's UV radiation almost twofold.

Frequently asked questions

What is the average December temperature in Houston?

In Houston, in December, the average high-temperature is 63°F (17.2°C), and the average low-temperature is 49.6°F (9.8°C). The average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), which calculates the temperature value influenced by the moisture in the air, in October is calculated to be 84.2°F (29°C).

What is the average humidity in December?

In December, the average relative humidity is 76%.

How many days does it rain in December?

In Houston, Texas, in December, it is raining for 13.9 days, with typically 2.52" (64mm) of accumulated precipitation.

What is the snowiest month?

The month with the most snowfall is December, when snow falls for 0.1 days and typically aggregates up to 0.08" (2mm) of snow.

When does it start to snow?

December is the first month it typically snows in Houston. Throughout December, in the average 0.1 snowfall days, it receives 0.08" (2mm) of snow.

What is the month with the shortest days?

December has the shortest days of the year, with an average of 10h and 18min of daylight.

What is the average length of the day in December?

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

When is the sunrise / sunset in December?

In December, on the first day of the month, sunrise is at 6:59 am and sunset at 5:21 pm. On the last day of the month, sunrise is at 7:16 am and sunset at 5:32 pm CST.

What is the month with the least sunshine?

With an average of 4.8h of sunshine, December has the least sunshine of the year in Houston.

How long on average sun shines in December?

In Houston, the average sunshine duration in December is 4.8h.

When is the lowest UV index?

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

What is the UV index intensity in December?

In Houston, the average daily maximum UV index in December is 3. A UV Index estimate of 3 to 5 represents a moderate health threat 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
Houston, TX

Average temperature in December - Houston, TX
  • Average high temperature in December: 63°F

The warmest month (with the highest average high temperature) is August (94.3°F).
The month with the lowest average high temperature is January (61.3°F).

  • Average low temperature in December: 49.6°F

The month with the highest average low temperature is August (77.5°F).
The coldest month (with the lowest average low temperature) is January (46°F).

Average pressure in December
Houston, TX

Average pressure in December - Houston, TX
  • Average pressure in December: 30.11"Hg

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

Average wind speed in December
Houston, TX

Average wind speed in December - Houston, TX
  • Average wind speed in December: 7.6mph

The windiest month (with the highest average wind speed) is April (8.6mph).
The calmest month (with the lowest average wind speed) is September (5.9mph).

Average humidity in December
Houston, TX

Average humidity in December - Houston, TX
  • Average humidity in December: 76%

The month with the highest relative humidity is February (78%).
The months with the lowest relative humidity are August and October (70%).

Average rainfall in December
Houston, TX

Average rainfall in December - Houston, TX
  • Average rainfall in December: 2.52"

The wettest month (with the highest rainfall) is September (4.49").
The driest month (with the least rainfall) is February (1.77").

Average rainfall days in December
Houston, TX

Average rainfall days in December - Houston, TX
  • Average rainfall days in December: 13.9 days

The month with the highest number of rainy days is September (19.5 days).
The month with the least rainy days is January (11.8 days).

Average snowfall in December
Houston, TX

Average snowfall in December - Houston, TX
  • Average snowfall in December: 0.08"

The month with the highest snowfall is December (0.08").
The months with the least snowfall are February, March, April, May, June, July, August, September, October and November (0").

Average snowfall days in December
Houston, TX

Average snowfall days in December - Houston, TX
  • Average snowfall days in December: 0.1 days

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

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

Average daylight in December / Average sunshine in December - Houston, TX
  • 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: 4h and 5min

The month with the most sunshine is August (Average sunshine: 10h and 30min).
The month with the least sunshine is December (Average sunshine: 4h and 48min).

Average sunshine days in December
Houston, TX

Average sunshine days in December - Houston, TX
  • Average sunshine days in December: 14.6 days

The month with the most sunshine days is January (16.3 days).
The month with the least sunshine days is September (7.9 days).

Average UV index in December
Houston, TX

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

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

Average cloud cover in December
Houston, TX

Average cloud cover in December - Houston, TX
  • Average cloud cover in December: 49

The month with the most cloud cover is February (Cloud cover 51).
The month with the least cloud cover is August (Cloud cover 27).

Average visibility in December
Houston, TX

Average visibility in December - Houston, 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).

Houston, Texas, USA

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