Galveston weather in December 2025

Expect daytime maximum temperatures of 17°C in Galveston, Texas in December based on long-term weather averages. There are 5 hours of sunshine per day on average with typically 89 mm of rainfall in the month.

  • 17°C maximum daytime temperature in December in Galveston17
    17°C max day temperature
  • 5 hours of sunshine per day
  • 8 days with some rainfall in December in Galveston8
    8 days with some rainfall
  • 10°C minimum night-time temperature in December in Galveston10
    10°C min night temperature
  • 10 hours of daylight per day in December in Galveston10
    10 hours of daylight per day
  • No heat & humidity in December in Galveston0
    No heat & humidity
  • 89 mm monthly rainfall in December in Galveston89
    89 mm of monthly rainfall
  • UV (maximum) index 4 (Moderate) in December in Galveston4
    4 (Moderate) UV index
  • 17°C sea temperature in December in Galveston17
    17°C sea temperature

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The December weather guide for Texas (Galveston) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C / mm)  |  Imperial (°F / inches)

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How warm is it in Galveston in December?

Daytime temperatures usually reach 17°C in Galveston in December, falling to 10°C at night.

How sunny is it in Galveston in December?

There are normally 5 hours of bright sunshine each day in Galveston in December - that's 47% of daylight hours.

How warm is the sea around Galveston in December?

The average sea temperature around Galveston in December is 17°C.

Does it rain in Galveston in December?

There are usually 8 days with some rain in Galveston in December and the average monthly rainfall is 89mm.

Galveston December sunrise & sunset times

Browse the sunrise and sunset times for Galveston in December 2025. Select a month to view Galveston sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st December 2025 06:56 17:20
Tuesday, 16th December 2025 07:07 17:23
Wednesday, 31st December 2025 07:13 17:32

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