San Antonio in Winter
In winter (December, January and February), San Antonio sees average daytime highs around 64°F and overnight lows near 44°F, with 7.0 in of rain over about 22 wet days across the season. It is the coldest season of the year and the 3rd-wettest season.
Across winter, daytime highs hold fairly steady around 64°F. The sky is clear or mostly clear about 38% of the time across winter, and the air most often feels dry.
Winter is San Antonio's 2nd-best season to visit on our travel score. For the whole year in context, see San Antonio's year-round climate.
- Avg daytime high
- 64°F
- coldest season of the year
- Avg overnight low
- 44°F
- Rainfall
- 7.0 in
- 22 wet days
- Avg wind
- 7 mph
- Travel score
- 6.1
- 2nd-best season
- Months
- Dec · Jan · Feb
Temperature in San Antonio in Winter
Across winter, daytime highs hold fairly steady around 64°F.
A typical winter day in San Antonio reaches about 64°F and drops to 44°F overnight. The warmest of the three months is February, the coolest January.
How winter really feels in San Antonio
Once humidity and wind are folded in, winter brings about 0 days that feel above 90°F and 0 that feel at or below 32°F.
winter sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.
San Antonio weather by month
How the three winter months (December, January and February) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°F) | Rainfall (inches) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 62° / 43° | 2.2 | 7.2 | 10.3 | 5.8 |
| Feb | 67° / 46° | 2.3 | 7.4 | 10.9 | 6.5 |
| Mar | 73° / 53° | 3.1 | 9.2 | 11.8 | 6.9 |
| Apr | 80° / 59° | 3.1 | 8.5 | 12.7 | 6.8 |
| May | 86° / 67° | 4.1 | 11.2 | 13.5 | 5.0 |
| Jun | 91° / 73° | 2.7 | 9.5 | 13.8 | 3.6 |
| Jul | 94° / 74° | 2.0 | 6.2 | 13.7 | 3.1 |
| Aug | 95° / 74° | 1.9 | 5.8 | 13.1 | 2.8 |
| Sep | 89° / 70° | 3.0 | 8.6 | 12.2 | 4.3 |
| Oct | 81° / 61° | 3.3 | 7.7 | 11.3 | 6.8 |
| Nov | 71° / 51° | 2.6 | 7.2 | 10.5 | 7.1 |
| Dec | 64° / 44° | 2.5 | 7.5 | 10.1 | 6.1 |
Cloud cover in Winter
The sky is clear or mostly clear about 38% of the time across winter.
Chance of precipitation in Winter
San Antonio gets around 7.0 in of rain over 22 wet days across winter. The line is the day-by-day chance of measurable precipitation.
Humidity in Winter
Most of winter feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Winter
Winds average 7 mph across winter.
Sunrise & sunset in Winter
Daylight runs from about 10 h 18 min in early December to 11 h 18 min by late February. The lit band spans sunrise to sunset each day.
Solar energy in Winter
Average shortwave solar energy reaching the ground each day across winter, about 3.1 kWh/m².
Is winter a good time to visit San Antonio?
Our two travel scores rate winter for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
winter is a reasonable time to visit San Antonio for sightseeing.
What to pack for San Antonio in Winter
From winter's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In winter, San Antonio sees daytime highs around 64°F and nights near 44°F. Worth packing: a warm layer. About 22 days see rain.
UV index in San Antonio in Winter
Clear-sky midday UV across winter averages around 5 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in San Antonio peaks around August 11 at about 11 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 20 at about 4 (moderate).
The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 4 | 6 | 7 | 10 | 10 | 11 | 11 | 11 | 9 | 6 | 5 | 4 |
| Level | Moderate | High | Very high | Very high | Extreme | Extreme | Extreme | Extreme | Very high | High | High | Moderate |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 4 | Moderate |
| Feb | 6 | High |
| Mar | 7 | Very high |
| Apr | 10 | Very high |
| May | 10 | Extreme |
| Jun | 11 | Extreme |
| Jul | 11 | Extreme |
| Aug | 11 | Extreme |
| Sep | 9 | Very high |
| Oct | 6 | High |
| Nov | 5 | High |
| Dec | 4 | Moderate |
Air quality in San Antonio in Winter
Average fine-particle pollution (PM2.5) through the year — so you can see where winter falls, not just the annual average.
Air quality in San Antonio is worst in July — around 18 µg/m³ PM2.5 (moderate), about 2.8× the cleanest month (October, 6 µg/m³).
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 7 | 7 | 9 | 10 | 15 | 15 | 18 | 12 | 10 | 6 | 6 | 7 |
| Level | Good | Good | Good | Good | Moderate | Moderate | Moderate | Good | Good | Good | Good | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 7 | Good |
| Feb | 7 | Good |
| Mar | 9 | Good |
| Apr | 10 | Good |
| May | 15 | Moderate |
| Jun | 15 | Moderate |
| Jul | 18 | Moderate |
| Aug | 12 | Good |
| Sep | 10 | Good |
| Oct | 6 | Good |
| Nov | 6 | Good |
| Dec | 7 | Good |
Where is San Antonio?
San Antonio sits at 29.4°N, 98.5°W, 650 ft above sea level, in United States. The nearest listed city is Converse, 12 mi away.
Topography around San Antonio
How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of San Antonio.
Within 2 miles, the terrain around San Antonio has only modest variations in elevation — a maximum elevation change of 174 ft around an average of 669 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 607 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 1,827 ft.
The land around San Antonio is covered by artificial surfaces (75%) within 2 miles, trees (38%), artificial surfaces (38%) and grassland (20%) within 10 miles, and trees (50%) and grassland (38%) within 50 miles.
United States travel facts
- Power plugs
- Type A / B
- 120 V · 60 Hz
- Prices
- ≈ 100% of US
- price level, 2025
- GDP per capita
- $90,027
- 2025
- Happiness
- 6.8 / 10
- World Happiness, 2025
- Safe drinking water
- 98%
- of population, 2024
- Homicide rate
- 5.8
- per 100k, 2023
- Road deaths
- 12.7
- per 100k/yr, 2019
- Income group
- High
- World Bank
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for San Antonio (29.4241°, -98.4936°, elevation 650 ft), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google.