December weather forecast
Houston, TX

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

The first month of the winter, December, is still a comfortable month in Houston, Texas, with an average temperature varying between 49.6°F (9.8°C) and 63°F (17.2°C).

Temperature

In December, the average high-temperature slightly decreases from a pleasant 70.3°F (21.3°C) in November to a comfortable 63°F (17.2°C). In December, in Houston, Texas, the average low-temperature is 49.6°F (9.8°C).

Humidity

The average relative humidity in December in Houston is 76%.

Rainfall

In Houston, during December, the rain falls for 13.9 days and regularly aggregates up to 2.52" (64mm) of precipitation. Throughout the year, there are 180.5 rainfall days, and 35.35" (898mm) of precipitation is accumulated.

Snowfall

January and December are months with snowfall in Houston. December is the month with the most snowfall. Snow falls for 0.1 days and accumulates 0.08" (2mm) of snow.

Daylight

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

Sunshine

The month with the least sunshine in Houston is December, 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 reading of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV radiation for the average person.
Note: The average daily UV index of 3 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. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
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FAQ

What is the average humidity in December in Houston?

In Houston, the average relative humidity in December is 76%.

How much does it rain in Houston in December?

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

When does it snow the most in Houston?

The month with the most snowfall in Houston, Texas, 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 in Houston?

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

What is the month with the shortest days in Houston?

December has the shortest days of the year in Houston, with an average of 10h and 16min of daylight.

How many hours of daylight does Houston have in December?

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

When are sunrise and sunset in December in Houston?

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.

What is the month with the least sunshine in Houston?

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

How long on average sun shines in December in Houston?

The average sunshine duration in December in Houston, Texas, is 4.8h.

When is the lowest UV index in Houston?

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

What is the UV index intensity in December in Houston?

In Houston, the average daily maximum UV index in December is 3. A UV Index of 3 to 5 symbolizes a medium health risk from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
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).

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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).

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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).

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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%).

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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").

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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).

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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").

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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).

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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 16min

The month with the longest days is June (Average daylight: 14h and 2min).
The month with the shortest days is December (Average daylight: 10h and 16min).

  • Average sunshine in December: 4h and 48min

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).

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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).

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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).

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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).

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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).

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