Galveston Island (TX)
December
Weather in Galveston Island, Texas for December 2025
Your guide to Galveston Island weather in December - trends and predictions
Until now, December 2025 in Galveston Island is slightly cooler than the historical average by -0.9 °F.
The forecast for the next days in Galveston Island predicts temperatures to be around 18 °F, close to the historical average.
In general, the average temperature in Galveston Island at the beginning of December is 17.6 °F. As the month progressed, temperatures tended to moderately rise, reaching an average of 18.7 °F by the end of December.
Galveston Island experiences moderate rainfall in December, with an average of 10 rainy days and a total precipitation of 173 mm.
New! Chat with our AI weatherman - it’s amazing and free.
Temperatures
Rain 🌧️
More
21
Dry days
10
Rainy days
0
Snow days
18°/15°
Temperatures
30 km/h
Avg max wind
82 %
Avg humidity
Galveston Island Weather December
Move between months or click on a day
Temperatures trend during December in Galveston Island
See the weather trend as well as the moving average line
December weather in Galveston Island day by day
Click on a date for more information
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Dec. 1 |  Moderate rain at times | 15° /13° | 1.7 mm | 4 | |
| Dec. 2 |  Overcast | 15° /10° | 0 mm | 4 | |
| Dec. 3 | Overcast | 19° /13° | 1.4 mm | 5 | |
| Dec. 4 | Moderate or heavy rain shower | 21° /15° | 46.7 mm | 5 | |
| Dec. 5 |  Patchy rain possible | 17° /13° | 1.9 mm | 4 | |
| Dec. 6 |  Partly cloudy | 17° /10° | 0.3 mm | 5 | |
| Dec. 7 | Moderate or heavy rain shower | 19° /14° | 4.6 mm | 5 | |
| Dec. 8 |  Heavy rain at times | 17° /12° | 3.5 mm | 4 | |
| Dec. 9 | Patchy rain possible | 17° /14° | 0.1 mm | 4 | |
| Dec. 10 | Overcast | 18° /13° | 0 mm | 4 | |
| Dec. 11 |  Sunny | 16° /11° | 0 mm | 5 | |
| Dec. 12 | Sunny | 18° /15° | 5.4 mm | 5 | |
| Dec. 13 | Partly cloudy | 24° /16° | 0 mm | 0.8 | |
| Dec. 14 |  Moderate rain | 17° /10° | 7.8 mm | 0.5 | |
| Dec. 15 | Partly cloudy | 9° /4° | 0 mm | 0.8 | |
| Dec. 16 | Partly cloudy | 17° /13° | 0 mm | 0.7 | |
| Dec. 17 | Partly cloudy | 19° /17° | 0 mm | 0 | |
| Dec. 18 | Sunny | 19° /18° | 0 mm | 5 | |
| Dec. 19 | Moderate rain | 19° /18° | 5.9 mm | 4 | |
| Dec. 20 | Moderate rain | 18° /17° | 8.1 mm | 4 | |
| Dec. 21 |  Mist | 19° /17° | 0 mm | 4 | |
| Dec. 22 | Partly cloudy | 19° /18° | 0 mm | 5 | |
| Dec. 23 |  Cloudy | 19° /18° | 0 mm | 4 | |
| Dec. 24 | Fog | 19° /18° | 0.1 mm | 4 | |
| Dec. 25 | Partly cloudy | 19° /18° | 0 mm | 5 | |
| Dec. 26 | Cloudy | 19° /17° | 0 mm | 4 | |
| Dec. 27 | Overcast | 18° /17° | 0.5 mm | 4 | |
| Dec. 28 | Moderate or heavy rain shower | 20° /18° | 8.8 mm | 4 | |
| Dec. 29 | Overcast | 18° /14° | 0 mm | 4 | |
| Dec. 30 | Overcast | 18° /15° | 0 mm | 4 | |
| Dec. 31 | Overcast | 19° /15° | 0 mm | 4 | |
| Next | |||||
Important Notice
Our weather forecast for Galveston Island in December is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Galveston Island forecast closer to your planned date for the most up-to-date weather information.
Change Month
Galveston Island in December - FAQ
What are the expected maximum and minimum temperatures in Galveston Island during December?
During December, expect a variety of temperatures with highs around 18° and lows near 15°, suitable for diverse activities and preferences.
How much rainfall should be expected in Galveston Island during December?
Significant rainfall exceeding 173 mm is expected in Galveston Island during December, occurring over more than 10 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Galveston Island during December?
The average wind speed in Galveston Island during December is 30 km/h, suggesting breezy to windy conditions, depending on your activities.
December rainfall patterns in Galveston Island
Explore the daily rainfall trends and prepare for Galveston Islands December weather 💧
Typically, Galveston Island has 10 rainy days in December with a total of 173 mm of rainfall.
UV exposure in Galveston Island during December
Stay informed about UV levels for safe outdoor activities throughout the month of December ☀️
Quick links
More Galveston Island weather pages
You are here
Where is Galveston Island?Get accurate weather forecasts for Galveston Island, located at latitude 29.222 and longitude -94.909. Stay updated with localized weather information tailored for Galveston Island.
Found a mistake?
We appreciate your attention to details. Tell us here.