Houston
Texas, USA
Long-term weather forecast
Long-term weather forecast

December weather forecast and climate
Houston, TX

A beautiful park in Root square overlooking the central business district of Houston, Texas
A beautiful park in Root square overlooking the central business district of Houston, Texas
December is the beginning of the winter season in Houston, with relatively mild temperatures. The average temperatures in the 45°F (7.2°C) to 64°F (17.8°C) range and the days are balmy and warm despite the onset of winter.
Snow is rare in Houston, but the nights are occasionally frosty and chilly. The dampness is due to the moderate rain, which measures 3.7" (94mm) during the month. The clean air from the Gulf reduces the humidity. The shortest days of the year usually happen to be in December with a maximum of 10 hours of daylight.
Christmas is generally warm in Houston, typical of Central and Southern Texas.

What is the temperature in December in Houston?

In December, in Houston, Texas, the average high-temperature is 64.2°F (17.9°C), and the average low-temperature is 44.6°F (7°C).

What is the average humidity in December in Houston?

In December, the average relative humidity is 75.5%.

How much does it rain in Houston in December?

In Houston, Texas, during December, the rain falls for 9.5 days and regularly aggregates up to 3.7" (95mm) of precipitation.

What is the month with the shortest days in Houston?

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

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

The average length of the day in December in Houston is 10.3h.

How many hours of sunshine does Houston have in December?

The average sunshine in December in Houston is 4.8h.

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

January and December, with an average maximum UV index of 4, are months with the lowest UV index in Houston.

What is the UV index reading in December in Houston?

In December, the average daily maximum UV index is 4. A UV Index of 3 to 5 symbolizes a moderate vulnerability from the exposure to the Sun's UV radiation.
Average temperature in December - Houston, TX
  • Average high temperature in December: 64.3°F

The warmest month (with the highest average high temperature) is August (94.5°F).
The month with the lowest average high temperature is January (62.9°F).

  • Average low temperature in December: 44.6°F

The month with the highest average low temperature is July (75.1°F).
The coldest month (with the lowest average low temperature) is January (43.2°F).

Average humidity in December - Houston, TX
  • Average humidity in December: 75.5%

The month with the highest relative humidity is September (76.8%).
The month with the lowest relative humidity is March (72.7%).

Average rainfall in December - Houston, TX
  • Average rainfall in December: 3.7"

The wettest month (with the highest rainfall) is June (5.9").
The driest month (with the lowest rainfall) is February (3.2").

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

The month with the highest number of rainy days is June (10.6 days).
The month with the lowest number of rainy days is April (6.8 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 shortest days is December (Average daylight: 10.3h).

  • Average sunshine in December: 4.8h

The month with most sunshine is July (Average sunshine: 9.5h).
The month with least sunshine is January (Average sunshine: 4.6h).

Average UV index in December - Houston, TX
  • Average UV index in December: 4

Months with the highest UV index are June and July (UV index 11).
Months with the lowest UV index are January and December (UV index 4).