San Antonio weather in December 2025

Expect daytime maximum temperatures of 64°F in San Antonio, Texas in December based on long-term weather averages. There are 5 hours of sunshine per day on average.

  • 64°F maximum daytime temperature in December in San Antonio64
    64°F max day temperature
  • 5 hours of sunshine per day
  • 7 days with some rainfall in December in San Antonio7
    7 days with some rainfall
  • 41°F minimum night-time temperature in December in San Antonio41
    41°F min night temperature
  • 10 hours of daylight per day in December in San Antonio10
    10 hours of daylight per day
  • No heat & humidity in December in San Antonio0
    No heat & humidity
  • 1.5 inches monthly rainfall in December in San Antonio1.5
    1.5 inches of monthly rainfall
  • UV (maximum) index 4 (Moderate) in December in San Antonio4
    4 (Moderate) UV index

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The December weather guide for Texas (San Antonio) 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)  |  Imperial (°F)

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How hot is it in San Antonio in December?

Daytime temperatures usually reach 64°F in San Antonio in December, falling to 41°F at night.

How sunny is it in San Antonio in December?

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

Does it rain in San Antonio in December?

There are usually 7 days with some rain in San Antonio in December and the average monthly rainfall is 1.5 inches.

San Antonio December sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st December 2025 07:11 17:35
Tuesday, 16th December 2025 07:22 17:38
Wednesday, 31st December 2025 07:28 17:46

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