Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average snowfall days in December
- Average sea temperature in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
December
Weather in December
Temperature
The average high-temperature slightly decreases in December, shifting from an agreeable 68.9°F (20.5°C) in November to a comfortable 62.6°F (17°C). Galveston's nighttime temperature in December shows a minor descent, with a steady average of 54.9°F (12.7°C).Humidity
In Galveston, the average relative humidity in December is 79%.Rainfall
In Galveston, in December, it is raining for 13 days, with typically 1.38" (35mm) of accumulated precipitation. In Galveston, during the entire year, the rain falls for 161.9 days and collects up to 24.33" (618mm) of precipitation.Snowfall
March through December are months without snowfall.Ocean temperature
In Galveston, in December, the average water temperature is 60.4°F (15.8°C).Note: Swimming in 60.4°F (15.8°C) is not an enjoyable experience for most. Breathing becomes progressively more challenging as the water temperature decreases from 69.8°F (21°C) to 59°F (15°C).
Daylight
December has the shortest days of the year, with an average of 10h and 18min of daylight.On the first day of December, 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.
Sunshine
The month with the least sunshine in Galveston is December, with an average of 4.9h of sunshine.UV index
January and December, with an average maximum UV index of 4, are months with the lowest UV index. A UV Index value of 3 to 5 symbolizes a moderate health risk from unprotected exposure to Sun's UV rays for average individuals.Note: A maximum high daily UV index of 4 during December translates into the following directions:
Heed the precautions - Suggestions to avoid sunburn are made. Avoiding the Sun during its peak radiation time around midday is a healthy practice. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average December temperature?
What is the average humidity in December?
How much does it rain in December?
When it does not snow?
Does it snow in Galveston in December?
What is the ocean temperature in December?
What is the month with the shortest days?
What is the average length of the day in December in Galveston?
When are sunrise and sunset in December?
What is the month with the least sunshine?
How many hours of sunshine does Galveston have in December?
What is the month with the lowest UV index?
What is the UV index intensity in December?
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).
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).
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).
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%).
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").
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).
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).
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).
Average daylight in December /
Average sunshine in December
Galveston, 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 54min).
The month with the least sunshine is December (Average sunshine: 4h and 54min).
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).
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).
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).
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).
