San Antonio weather in January
In January, San Antonio sees average daytime highs of 21°C and overnight lows near 14°C, with 0 mm of rain across 0.1 wet days and about 14 hours of daylight. It is the 1st-warmest and 12th-wettest month of the year here.
Day-to-day highs hold fairly steady near 21°C through the month. The sky is clear or mostly clear about 87% of the time in January, and the air most often feels comfortable.
Daylight stretches from about 14 h 12 min at the start of January to 13 h 42 min by month's end. Set against the rest of the year, January is San Antonio's 1st-clearest and 4th-windiest month. For the whole year in context, see San Antonio's year-round climate.
- Daytime high
- 21°
- 1st warmest
- Overnight low
- 14°
- 12th coldest
- Rainfall
- 0 mm
- 0.1 wet days
- Daylight
- 14 hours
- 6:56 AM – 8:56 PM
- Cloud cover
- 16%
- 1st clearest
- Wind
- 11 km/h
- 4th windiest
- Solar energy
- 8.77 kWh/m²
- Travel score
- 8.8
- out of 10
San Antonio is city in Chile.
- Density
- 3,926/km²
- people per km²
- Founded
- 1894
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in January
Day-to-day highs hold fairly steady near 21°C through the month.
A typical January day in San Antonio reaches about 21°C in the afternoon and slips back to 14°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 18°C and 23°C. Set against its neighbours, January runs about 1°C warmer than December and on par with February.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 |
| Avg low (°C) | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 20 | 13 |
| 2 | 20 | 13 |
| 3 | 20 | 13 |
| 4 | 20 | 13 |
| 5 | 20 | 13 |
| 6 | 20 | 13 |
| 7 | 20 | 13 |
| 8 | 21 | 13 |
| 9 | 21 | 14 |
| 10 | 21 | 14 |
| 11 | 21 | 14 |
| 12 | 21 | 14 |
| 13 | 21 | 14 |
| 14 | 21 | 14 |
| 15 | 21 | 14 |
| 16 | 21 | 14 |
| 17 | 21 | 14 |
| 18 | 21 | 14 |
| 19 | 21 | 14 |
| 20 | 21 | 14 |
| 21 | 21 | 14 |
| 22 | 21 | 14 |
| 23 | 21 | 14 |
| 24 | 21 | 14 |
| 25 | 21 | 14 |
| 26 | 21 | 14 |
| 27 | 21 | 14 |
| 28 | 21 | 14 |
| 29 | 21 | 14 |
| 30 | 21 | 14 |
| 31 | 21 | 14 |
San Antonio weather by month
How January compares with the rest of the year at a glance. January is the 1st-warmest and 12th-wettest month here — the current month is highlighted below.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 21° / 14° | 0 | 0.1 | 14 | 8.8 |
| Feb | 21° / 14° | 2 | 0.3 | 13.2 | 8.7 |
| Mar | 20° / 12° | 4 | 0.7 | 12.3 | 8.4 |
| Apr | 18° / 10° | 18 | 2.2 | 11.2 | 7.2 |
| May | 16° / 9° | 61 | 4.7 | 10.3 | 5.5 |
| Jun | 14° / 8° | 122 | 7 | 9.8 | 4.3 |
| Jul | 13° / 7° | 67 | 5.5 | 10 | 4.2 |
| Aug | 14° / 7° | 59 | 5.1 | 10.8 | 4.6 |
| Sep | 15° / 8° | 28 | 3 | 11.8 | 5.5 |
| Oct | 17° / 10° | 14 | 1.8 | 12.8 | 6.7 |
| Nov | 18° / 11° | 4 | 0.7 | 13.7 | 7.9 |
| Dec | 20° / 12° | 3 | 0.4 | 14.2 | 8.4 |
Cloud cover in January
The sky is clear or mostly clear about 87% of the time in January, the clearest month of the year.
Beyond those clear spells, partly cloudy skies cover about 6% of January, with mostly cloudy or overcast conditions the remaining 7%.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 93 | 93 | 93 | 93 | 94 | 94 | 94 | 94 | 94 | 94 | 93 | 93 | 93 | 93 | 93 | 93 | 93 | 93 | 93 | 93 | 93 | 93 | 93 | 93 | 93 | 93 | 93 | 93 | 93 | 94 | 94 |
| Cloudier (%) | 7 | 7 | 7 | 7 | 6 | 6 | 6 | 6 | 6 | 6 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 6 | 6 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 93 | 7 |
| 2 | 93 | 7 |
| 3 | 93 | 7 |
| 4 | 93 | 7 |
| 5 | 94 | 6 |
| 6 | 94 | 6 |
| 7 | 94 | 6 |
| 8 | 94 | 6 |
| 9 | 94 | 6 |
| 10 | 94 | 6 |
| 11 | 93 | 7 |
| 12 | 93 | 7 |
| 13 | 93 | 7 |
| 14 | 93 | 7 |
| 15 | 93 | 7 |
| 16 | 93 | 7 |
| 17 | 93 | 7 |
| 18 | 93 | 7 |
| 19 | 93 | 7 |
| 20 | 93 | 7 |
| 21 | 93 | 7 |
| 22 | 93 | 7 |
| 23 | 93 | 7 |
| 24 | 93 | 7 |
| 25 | 93 | 7 |
| 26 | 93 | 7 |
| 27 | 93 | 7 |
| 28 | 93 | 7 |
| 29 | 93 | 7 |
| 30 | 94 | 6 |
| 31 | 94 | 6 |
Chance of precipitation in January
San Antonio gets around 0 mm of rain over 0.1 wet days in January, the driest month. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 0% and peaks near 1% on the wettest days.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain chance (%) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| Rain chance (%) | |
|---|---|
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 0 |
| 6 | 0 |
| 7 | 0 |
| 8 | 0 |
| 9 | 0 |
| 10 | 0 |
| 11 | 0 |
| 12 | 0 |
| 13 | 0 |
| 14 | 0 |
| 15 | 0 |
| 16 | 0 |
| 17 | 0 |
| 18 | 0 |
| 19 | 0 |
| 20 | 0 |
| 21 | 0 |
| 22 | 0 |
| 23 | 1 |
| 24 | 1 |
| 25 | 1 |
| 26 | 1 |
| 27 | 1 |
| 28 | 1 |
| 29 | 1 |
| 30 | 1 |
| 31 | 1 |
Humidity in January
Most of January feels comfortable — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, January lands in the comfortable band about 56% of days. It rarely turns muggy — the humid and sticky bands barely register.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dry (%) | 59 | 58 | 57 | 56 | 55 | 54 | 53 | 52 | 51 | 49 | 48 | 47 | 45 | 44 | 42 | 41 | 39 | 38 | 37 | 36 | 36 | 35 | 35 | 35 | 35 | 35 | 36 | 36 | 37 | 38 | 38 |
| Comfortable (%) | 41 | 42 | 43 | 44 | 45 | 46 | 47 | 48 | 49 | 51 | 52 | 53 | 55 | 56 | 57 | 58 | 60 | 61 | 62 | 63 | 63 | 64 | 64 | 64 | 64 | 64 | 63 | 63 | 62 | 61 | 61 |
| Humid (%) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| Dry (%) | Comfortable (%) | Humid (%) | |
|---|---|---|---|
| 1 | 59 | 41 | 0 |
| 2 | 58 | 42 | 0 |
| 3 | 57 | 43 | 0 |
| 4 | 56 | 44 | 0 |
| 5 | 55 | 45 | 0 |
| 6 | 54 | 46 | 0 |
| 7 | 53 | 47 | 0 |
| 8 | 52 | 48 | 0 |
| 9 | 51 | 49 | 0 |
| 10 | 49 | 51 | 0 |
| 11 | 48 | 52 | 0 |
| 12 | 47 | 53 | 0 |
| 13 | 45 | 55 | 0 |
| 14 | 44 | 56 | 0 |
| 15 | 42 | 57 | 1 |
| 16 | 41 | 58 | 1 |
| 17 | 39 | 60 | 1 |
| 18 | 38 | 61 | 1 |
| 19 | 37 | 62 | 1 |
| 20 | 36 | 63 | 1 |
| 21 | 36 | 63 | 1 |
| 22 | 35 | 64 | 1 |
| 23 | 35 | 64 | 1 |
| 24 | 35 | 64 | 1 |
| 25 | 35 | 64 | 1 |
| 26 | 35 | 64 | 1 |
| 27 | 36 | 63 | 1 |
| 28 | 36 | 63 | 1 |
| 29 | 37 | 62 | 1 |
| 30 | 38 | 61 | 1 |
| 31 | 38 | 61 | 1 |
Wind in January
Winds average 11 km/h in January.
Across January, daily wind ranges from about 11 km/h on the calmest days to 11 km/h at its breeziest. It stays fairly steady from day to day.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 |
| Feels | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm |
| Wind speed (km/h) | Feels | |
|---|---|---|
| 1 | 11 | calm |
| 2 | 11 | calm |
| 3 | 11 | calm |
| 4 | 11 | calm |
| 5 | 11 | calm |
| 6 | 11 | calm |
| 7 | 11 | calm |
| 8 | 11 | calm |
| 9 | 11 | calm |
| 10 | 11 | calm |
| 11 | 11 | calm |
| 12 | 11 | calm |
| 13 | 11 | calm |
| 14 | 11 | calm |
| 15 | 11 | calm |
| 16 | 11 | calm |
| 17 | 11 | calm |
| 18 | 11 | calm |
| 19 | 11 | calm |
| 20 | 11 | calm |
| 21 | 11 | calm |
| 22 | 11 | calm |
| 23 | 11 | calm |
| 24 | 11 | calm |
| 25 | 11 | calm |
| 26 | 11 | calm |
| 27 | 11 | calm |
| 28 | 11 | calm |
| 29 | 11 | calm |
| 30 | 11 | calm |
| 31 | 11 | calm |
Sunrise & sunset in January
Daylight runs from about 14 h 12 min at the start of January to 13 h 42 min by month's end. The lit band spans sunrise to sunset each day.
Days shrink by about 30 minutes over January. Sunrise moves from 6:44 AM to 7:10 AM, and sunset from 8:55 PM to 8:50 PM.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 14.2 | 14.2 | 14.2 | 14.2 | 14.2 | 14.1 | 14.1 | 14.1 | 14.1 | 14.1 | 14.1 | 14.1 | 14.1 | 14.0 | 14.0 | 14.0 | 14.0 | 14.0 | 13.9 | 13.9 | 13.9 | 13.9 | 13.9 | 13.8 | 13.8 | 13.8 | 13.8 | 13.7 | 13.7 | 13.7 | 13.7 |
| Sunrise (AM) | 6:44 | 6:44 | 6:45 | 6:46 | 6:47 | 6:47 | 6:48 | 6:49 | 6:50 | 6:51 | 6:51 | 6:52 | 6:53 | 6:54 | 6:55 | 6:56 | 6:57 | 6:57 | 6:58 | 6:59 | 7:00 | 7:01 | 7:02 | 7:03 | 7:04 | 7:05 | 7:06 | 7:07 | 7:08 | 7:09 | 7:10 |
| Sunset (PM) | 8:55 | 8:56 | 8:56 | 8:56 | 8:56 | 8:56 | 8:56 | 8:56 | 8:56 | 8:56 | 8:56 | 8:56 | 8:56 | 8:56 | 8:56 | 8:56 | 8:56 | 8:55 | 8:55 | 8:55 | 8:55 | 8:54 | 8:54 | 8:53 | 8:53 | 8:53 | 8:52 | 8:52 | 8:51 | 8:50 | 8:50 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 14.2 | 6:44 | 8:55 |
| 2 | 14.2 | 6:44 | 8:56 |
| 3 | 14.2 | 6:45 | 8:56 |
| 4 | 14.2 | 6:46 | 8:56 |
| 5 | 14.2 | 6:47 | 8:56 |
| 6 | 14.1 | 6:47 | 8:56 |
| 7 | 14.1 | 6:48 | 8:56 |
| 8 | 14.1 | 6:49 | 8:56 |
| 9 | 14.1 | 6:50 | 8:56 |
| 10 | 14.1 | 6:51 | 8:56 |
| 11 | 14.1 | 6:51 | 8:56 |
| 12 | 14.1 | 6:52 | 8:56 |
| 13 | 14.1 | 6:53 | 8:56 |
| 14 | 14.0 | 6:54 | 8:56 |
| 15 | 14.0 | 6:55 | 8:56 |
| 16 | 14.0 | 6:56 | 8:56 |
| 17 | 14.0 | 6:57 | 8:56 |
| 18 | 14.0 | 6:57 | 8:55 |
| 19 | 13.9 | 6:58 | 8:55 |
| 20 | 13.9 | 6:59 | 8:55 |
| 21 | 13.9 | 7:00 | 8:55 |
| 22 | 13.9 | 7:01 | 8:54 |
| 23 | 13.9 | 7:02 | 8:54 |
| 24 | 13.8 | 7:03 | 8:53 |
| 25 | 13.8 | 7:04 | 8:53 |
| 26 | 13.8 | 7:05 | 8:53 |
| 27 | 13.8 | 7:06 | 8:52 |
| 28 | 13.7 | 7:07 | 8:52 |
| 29 | 13.7 | 7:08 | 8:51 |
| 30 | 13.7 | 7:09 | 8:50 |
| 31 | 13.7 | 7:10 | 8:50 |
Solar energy in January
Average shortwave solar energy reaching the ground each day in January, about 8.77 kWh/m².
For context, solar energy here swings from a low near 2.46 kWh/m² to a high of 8.96 kWh/m² in December across the year — January's 8.77 kWh/m² sits near the top of that range.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 9.0 | 9.0 | 9.0 | 9.0 | 9.0 | 9.0 | 8.9 | 8.9 | 8.9 | 8.9 | 8.9 | 8.9 | 8.8 | 8.8 | 8.8 | 8.8 | 8.7 | 8.7 | 8.7 | 8.7 | 8.6 | 8.6 | 8.6 | 8.6 | 8.6 | 8.5 | 8.5 | 8.5 | 8.4 | 8.4 | 8.4 |
| Level | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 9.0 | Intense |
| 2 | 9.0 | Intense |
| 3 | 9.0 | Intense |
| 4 | 9.0 | Intense |
| 5 | 9.0 | Intense |
| 6 | 9.0 | Intense |
| 7 | 8.9 | Intense |
| 8 | 8.9 | Intense |
| 9 | 8.9 | Intense |
| 10 | 8.9 | Intense |
| 11 | 8.9 | Intense |
| 12 | 8.9 | Intense |
| 13 | 8.8 | Intense |
| 14 | 8.8 | Intense |
| 15 | 8.8 | Intense |
| 16 | 8.8 | Intense |
| 17 | 8.7 | Intense |
| 18 | 8.7 | Intense |
| 19 | 8.7 | Intense |
| 20 | 8.7 | Intense |
| 21 | 8.6 | Intense |
| 22 | 8.6 | Intense |
| 23 | 8.6 | Intense |
| 24 | 8.6 | Intense |
| 25 | 8.6 | Intense |
| 26 | 8.5 | Intense |
| 27 | 8.5 | Intense |
| 28 | 8.5 | Intense |
| 29 | 8.4 | Intense |
| 30 | 8.4 | Intense |
| 31 | 8.4 | Intense |
Is January a good time to visit San Antonio?
Our two travel scores rate January for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
January is one of the better times to visit San Antonio for general sightseeing.
What to pack for San Antonio in January
From January's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In January, San Antonio sees daytime highs around 21°C and nights near 14°C. Pack sun protection.
Sea temperature near San Antonio in January
The nearest coast averages about 16°C in January — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea offshore is warmest in February at about 16°C and coldest in August near 12°C.
The water stays below 20°C all year — cool enough that most swimmers want a wetsuit.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 16 | 16 | 16 | 14 | 14 | 13 | 13 | 12 | 12 | 13 | 13 | 15 |
| Comfort | Cool | Cool | Cool | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 16 | Cool |
| Feb | 16 | Cool |
| Mar | 16 | Cool |
| Apr | 14 | Bracing |
| May | 14 | Bracing |
| Jun | 13 | Bracing |
| Jul | 13 | Bracing |
| Aug | 12 | Bracing |
| Sep | 12 | Bracing |
| Oct | 13 | Bracing |
| Nov | 13 | Bracing |
| Dec | 15 | Bracing |
UV index in San Antonio in January
Clear-sky midday UV in January peaks around 14 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in San Antonio peaks around January 17 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 19 at about 3 (moderate).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 10 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 14 | 12 | 10 | 5 | 3 | 3 | 3 | 4 | 6 | 9 | 11 | 12 |
| Level | Extreme | Extreme | Very high | High | Moderate | Moderate | Moderate | Moderate | High | Very high | Extreme | Extreme |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 14 | Extreme |
| Feb | 12 | Extreme |
| Mar | 10 | Very high |
| Apr | 5 | High |
| May | 3 | Moderate |
| Jun | 3 | Moderate |
| Jul | 3 | Moderate |
| Aug | 4 | Moderate |
| Sep | 6 | High |
| Oct | 9 | Very high |
| Nov | 11 | Extreme |
| Dec | 12 | Extreme |
Air quality in San Antonio in January
Average fine-particle pollution (PM2.5) through the year — so you can see where January falls, not just the annual average.
Air quality in San Antonio is worst in July — around 88 µg/m³ PM2.5 (unhealthy), about 2.5× the cleanest month (February, 35 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) | 45 | 35 | 40 | 58 | 83 | 85 | 88 | 77 | 64 | 45 | 37 | 38 |
| Level | Poor | Moderate | Poor | Unhealthy | Unhealthy | Unhealthy | Unhealthy | Unhealthy | Unhealthy | Poor | Poor | Poor |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 45 | Poor |
| Feb | 35 | Moderate |
| Mar | 40 | Poor |
| Apr | 58 | Unhealthy |
| May | 83 | Unhealthy |
| Jun | 85 | Unhealthy |
| Jul | 88 | Unhealthy |
| Aug | 77 | Unhealthy |
| Sep | 64 | Unhealthy |
| Oct | 45 | Poor |
| Nov | 37 | Poor |
| Dec | 38 | Poor |
Where is San Antonio?
San Antonio sits at 33.6°S, 71.6°W, 39 m above sea level, in Chile. The nearest listed city is Cartagena, 5.0 km away.
Topography around San Antonio
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of San Antonio.
Within 3 km, the terrain around San Antonio has only modest variations in elevation — a maximum elevation change of 212 m around an average of 54 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 488 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,259 m.
The land around San Antonio is covered by artificial surfaces (38%) and water (23%) within 3 km, water (40%) and grassland (24%) within 16 km, and water (29%) and grassland (22%) within 80 km.
Chile travel facts
- Travel advisory
- Level 2
- Exercise Increased Caution
- Power plugs
- Type C / F / L
- 220 V · 50 Hz
- Prices
- ≈ 48% of US
- price level, 2025
- GDP per capita
- $17,995
- 2025
- Happiness
- 6.3 / 10
- World Happiness, 2025
- Safe drinking water
- 98%
- of population, 2024
- Homicide rate
- 6.3
- per 100k, 2023
- Road deaths
- 14.9
- per 100k/yr, 2019
- Income group
- High
- World Bank
- English
- Moderate
- EF EPI 517
- 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 (-33.5947°, -71.6075°, elevation 39 m), 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. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).