December weather forecast
Galveston, TX

the colorful red night sky in the seaside city of Galveston in Texas
the colorful red night sky in the seaside city of Galveston in Texas

Weather in December

The first month of the winter, December, is still a comfortable month in Galveston, Texas, with an average temperature fluctuating between 62.6°F (17°C) and 54.9°F (12.7°C).

Temperature

In Galveston, the average high-temperature in December slightly decreases from a pleasant 68.9°F (20.5°C) in November to an enjoyable 62.6°F (17°C). In Galveston, the average low-temperature is 54.9°F (12.7°C).

Humidity

The average relative humidity in December in Galveston is 79%.

Rainfall

In Galveston, in December, during 13 rainfall days, 1.38" (35mm) of precipitation is typically accumulated. Throughout the year, there are 161.9 rainfall days, and 24.33" (618mm) of precipitation is accumulated.

Snowfall

March through December are months without snowfall in Galveston.

Ocean temperature

In December, the average ocean temperature is 60.4°F (15.8°C).
Note: For most, swimming in 60.4°F (15.8°C) is not an enjoyable activity. Furthermore, controlling your breathing becomes progressively more difficult as the water temperature decreases from 69.8°F (21°C) to 59°F (15°C).

Daylight

The month with the shortest days in Galveston is December, with an average of 10h and 19min of daylight.
On the first day of the month, sunrise is at 6:56 am and sunset at 5:20 pm. On the last day of December, in Galveston, sunrise is at 7:13 am and sunset at 5:31 pm CST.

Sunshine

December has the least sunshine of the year in Galveston, with an average of 4.9h of sunshine.

UV index

The months with the lowest UV index in Galveston are January and December, with an average maximum UV index of 4. A UV Index reading of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for ordinary individuals.
Note: In December, the average maximum UV index of 4 translate into the following recommendations:
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. A wide-brim hat offers excellent sun protection for the 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.
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FAQ

What is the average humidity in December in Galveston?

The average relative humidity in December is 79%.

How much does it rain in Galveston in December?

In December, in Galveston, Texas, the rain falls for 13 days. Throughout December, 1.38" (35mm) of precipitation is accumulated.

When it does not snow in Galveston?

In Galveston, snow does not fall in March through December.

Does it snow in Galveston in December?

In Galveston, Texas, in December, it doesn't snow. In January, it regularly snows.

What is the ocean temperature in December in Galveston?

In December, the average ocean temperature is 60.4°F (15.8°C). Swimming in 60.4°F (15.8°C) is not enjoyable for the majority. Controlling breathing becomes progressively more difficult as surface water temperature decreases below 69.8°F (21°C).

What is the month with the shortest days in Galveston?

The month with the shortest days in Galveston, Texas, is December, with an average of 10h and 19min of daylight.

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

The average day length in December in Galveston, Texas, is 10h and 19min.

What time are sunrise and sunset in December in Galveston?

On the first day of December in Galveston, sunrise is at 6:56 am and sunset at 5:20 pm. On the last day of the month, sunrise is at 7:13 am and sunset at 5:31 pm CST.

What is the month with the least sunshine in Galveston?

The month with the least sunshine is December, with an average of 4.9h of sunshine.

How many hours of sunshine does Galveston have in December?

The average sunshine duration in December in Galveston, Texas, is 4.9h.

What are the months with the lowest UV index in Galveston?

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

How high is the UV index in December in Galveston?

In Galveston, the average daily maximum UV index in December is 4. A UV Index value of 3 to 5 symbolizes a medium health risk from exposure to Sun's UV rays.

Average temperature in December
Galveston, TX

Average temperature in December - Galveston, TX
  • Average high temperature in December: 62.6°F

The warmest month (with the highest average high temperature) is August (87.4°F).
The month with the lowest average high temperature is January (59.7°F).

  • Average low temperature in December: 54.9°F

The month with the highest average low temperature is August (81.9°F).
The coldest month (with the lowest average low temperature) is January (51.6°F).

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Average pressure in December
Galveston, TX

Average pressure in December - Galveston, 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
Galveston, TX

Average wind speed in December - Galveston, TX
  • Average wind speed in December: 12.1mph

The windiest month (with the highest average wind speed) is April (12.9mph).
The calmest month (with the lowest average wind speed) is August (9.4mph).

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Average humidity in December
Galveston, TX

Average humidity in December - Galveston, TX
  • Average humidity in December: 79%

The months with the highest relative humidity are February and March (81%).
The month with the lowest relative humidity is October (72%).

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Average rainfall in December
Galveston, TX

Average rainfall in December - Galveston, TX
  • Average rainfall in December: 1.38"

The wettest month (with the highest rainfall) is September (4.29").
The driest months (with the least rainfall) are February and March (0.75").

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Average rainfall days in December
Galveston, TX

Average rainfall days in December - Galveston, TX
  • Average rainfall days in December: 13 days

The month with the highest number of rainy days is September (19.9 days).
The month with the least rainy days is January (10.1 days).

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Average snowfall days in December
Galveston, TX

Average snowfall days in December - Galveston, TX
  • Average snowfall days in December: 0 days

The month with the highest number of snowfall days is January (0.3 days).
The months with the least snowfall days are March, April, May, June, July, August, September, October, November and December (0 days).

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Average sea temperature in December
Galveston, TX

Average sea temperature in December - Galveston, TX
  • Average sea temperature in December: 60.3°F

The best month for swimming (with the highest average sea temperature) is August (87.2°F).
The coldest month (with the lowest average sea temperature) is January (56.5°F).

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

Average daylight in December / Average sunshine in December - Galveston, TX
  • Average daylight in December: 10h and 19min

The month with the longest days is June (Average daylight: 13h and 59min).
The month with the shortest days is December (Average daylight: 10h and 19min).

  • Average sunshine in December: 4.9h

The month with the most sunshine is August (Average sunshine: 10.9h).
The month with the least sunshine is December (Average sunshine: 4.9h).

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Average sunshine days in December
Galveston, TX

Average sunshine days in December - Galveston, TX
  • Average sunshine days in December: 14.3 days

The month with the most sunshine days is January (18.2 days).
The month with the least sunshine days is August (8.3 days).

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Average UV index in December
Galveston, TX

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

The months with the highest UV index are May, June, July, August and September (UV index 7).
The months with the lowest UV index are January and December (UV index 4).

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Average cloud cover in December
Galveston, TX

Average cloud cover in December - Galveston, TX
  • Average cloud cover in December: 47

The month with the most cloud cover is February (Cloud cover 49).
The months with the least cloud cover are June, July, August and October (Cloud cover 26).

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Average visibility in December
Galveston, TX

Average visibility in December - Galveston, 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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