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Climate · San Antonio

San Antonio in December

Mild and mostly dry, as the days hold steady.

Typical weather, averaged over 30 years

December in San Antonio is mild: highs near 68°F, lows near 47°F. Rain falls on about two days a week, and daylight holds at about 10 hours 17 minutes.December in San Antonio is mild: highs near 20°C, lows near 8°C. Rain falls on about two days a week, and daylight holds at about 10 hours 17 minutes.

High
68°F20°Caverage
Low
47°F8°Caverage
Wet days
2a week · 25% of days
Daylight
10h 17mon average

Is December a good time to visit San Antonio?

A good month, just outside San Antonio's best months, which run in two parts: March, or November.

How we judge it: every month is scored on how close its typical high comes to the range from 70°F to 80°F, how mild its nights are, and how rarely it rains. The best months are the run of months that scores best.How we judge it: every month is scored on how close its typical high comes to the range from 21°C to 27°C, how mild its nights are, and how rarely it rains. The best months are the run of months that scores best.

How December sits in the year

week by week

Temperature

Highs near 68°F in December, against 66°F to 99°F through the year.Highs near 20°C in December, against 19°C to 37°C through the year.

Chance of a wet day

25% of days in December, against 22% to 40% through the year.

Cloud cover

42% cover in December, against 31% to 50% through the year.

Daylight

10h 17m in December, against 10h 17m to 14h 00m through the year.

Week by week, lightly smoothed, with December shaded. The olive line marks the best months. Hover or tap a week for its figures.

Either side

  1. November76°24°low 55°low 13°2 wet days a weekRain on about two days a week.
  2. December68°20°low 47°low 8°2 wet days a weekRain on about two days a week.
  3. January66°19°low 44°low 7°2 wet days a weekRain on about two days a week.

Where San Antonio sits, in December

America/Chicago
this place
typical high in December 40°F4°C95°F35°C
Sunrise, mid-December
7:22 AMsets 5:38 PM
Above the sea
250 mlow-lying
Latitude
29.5°Nnorthern hemisphere
Nearest of ours
Houston322 km east

The land around San Antonio, shaded by its typical high in December, the planning map's own layer. Hover the map for the figure at that spot; tap it on a phone. Clock times are local, for the 15th.

Elsewhere in United States in December

high · low · wet days
See December on the planning mapThe whole year in San Antonio

Typical weather, averaged over 30 years (1995–2024), from the 11 km grid square nearest San Antonio. Temperatures are adjusted against 66 weather stations: daytime highs read about 3.1°F cold in the source data and are raised to match.Temperatures are adjusted against 66 weather stations: daytime highs read about 1.7°C cold in the source data and are raised to match. Daylight is calculated from latitude. Charts are lightly smoothed week to week; the figures in the table are not. Source: Copernicus ERA5-Land reanalysis; cloud cover from NASA's MERRA-2 reanalysis, on a coarser grid of about 50 km. Contains modified Copernicus Climate Change Service information 2026; neither the European Commission nor ECMWF is responsible for any use of it. These are averages, not a forecast.

Daylight is calculated from latitude. Charts are lightly smoothed week to week; the figures in the table are not.

Source: Copernicus ERA5-Land reanalysis; cloud cover from NASA's MERRA-2 reanalysis, on a coarser grid of about 50 km. Contains modified Copernicus Climate Change Service information 2026; neither the European Commission nor ECMWF is responsible for any use of it. These are averages, not a forecast.