December weather forecast and climate
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
December, the first month of the winter, in Houston, is still a comfortable month, with temperature in the range of an average low of 49.6°F (9.8°C) and an average high of 63°F (17.2°C).

Temperature

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

Humidity

In December, the average relative humidity is 76%.

Rainfall

In Houston, it is raining for 13.9 days, with typically 2.52" (64mm) of accumulated precipitation. Throughout the year, in Houston, there are 180.5 rainfall days, and 35.35" (898mm) of precipitation is accumulated.

Snowfall

Months with snowfall in Houston are January and December. 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

The month with the shortest days in Houston, Texas, is December, with an average of 10.3h of daylight.

Sunshine

The month with the least sunshine in Houston is December, with an average of 4.8h of sunshine.

UV index

The month with the lowest UV index is December, with an average maximum UV index of 3. A UV Index of 3 to 5 symbolizes a moderate health risk from the exposure to the Sun's UV radiation for the ordinary person.
Note: The daily maximum UV index of 3 in December interpret into the following advice:
Take precautions - Protection against sunburn is recommended. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.

What is the temperature in December in Houston?

The average high-temperature, in December, in Houston, is 63°F (17.2°C), while the average low-temperature is 49.6°F (9.8°C).

What is the average humidity in December in Houston?

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

How many days does it rain in December in Houston?

In Houston, during December, the rain falls for 13.9 days and regularly aggregates up to 2.52" (64mm) of precipitation.

When does it start to snow in Houston?

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.

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.

What is the month with the shortest days in Houston?

With an average of 10.3h of daylight, December has the shortest days of the year in Houston, Texas.

What is the average length of the day in December in Houston?

In Houston, Texas, the average length of the day in December is 10.3h.

What is the month with the least sunshine in Houston?

The month with the least sunshine in Houston, Texas, is December, with an average of 4.8h of sunshine.

How many hours of sunshine does Houston have in December?

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

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

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

What is the UV index reading 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 moderate vulnerability from unsafe exposure to the Sun's UV rays.
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: 30.11"

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

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: 76%

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

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: 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: 0.08"

The month with the highest snowfall is December (0.08").
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: 0.1 days

Months with the highest number of snowfall days are January and December (0.1 days).
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: 10.3h

The month with the longest days is June (Average daylight: 14h).
The month with the shortest days is December (Average daylight: 10.3h).

  • Average sunshine in December: 4.8h

The month with the most sunshine is August (Average sunshine: 10.5h).
The month with the least sunshine is December (Average sunshine: 4.8h).

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: 3

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: 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: 6mi

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