San Antonio weather in December
In December, San Antonio sees average daytime highs of 32°C and overnight lows near 22°C, with 165 mm of rain across 12.6 wet days and about 13.6 hours of daylight. It is the 3rd-warmest and 3rd-wettest month of the year here.
Day-to-day highs hold fairly steady near 32°C through the month. The sky is clear or mostly clear about 41% of the time in December, and the air most often feels oppressive.
Daylight stretches from about 13 h 30 min at the start of December to 13 h 36 min by month's end. Set against the rest of the year, December is San Antonio's 8th-clearest and 8th-windiest month. For the whole year in context, see San Antonio's year-round climate.
- Daytime high
- 32°
- 3rd warmest
- Overnight low
- 22°
- 10th coldest
- Rainfall
- 165 mm
- 12.6 wet days
- Daylight
- 13 h 36 min
- 5:59 AM – 7:34 PM
- Cloud cover
- 53%
- 8th clearest
- Wind
- 12 km/h
- 8th windiest
- Solar energy
- 6.73 kWh/m²
- Travel score
- 3.9
- out of 10
San Antonio is city in the Central Department, Paraguay.
- Density
- 2,424/km²
- people per km²
- Founded
- 1903
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in December
Day-to-day highs hold fairly steady near 32°C through the month.
A typical December day in San Antonio reaches about 32°C in the afternoon and slips back to 22°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 28°C and 35°C. Set against its neighbours, December runs about 2°C warmer than November and about 1°C cooler than January.
| 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) | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 32 | 32 | 32 | 32 | 32 | 32 | 32 | 32 | 32 | 32 | 32 | 32 | 32 | 32 | 32 | 32 | 32 | 32 | 32 | 32 | 33 | 33 |
| Avg low (°C) | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 31 | 21 |
| 2 | 31 | 21 |
| 3 | 31 | 21 |
| 4 | 31 | 21 |
| 5 | 31 | 21 |
| 6 | 31 | 21 |
| 7 | 31 | 21 |
| 8 | 31 | 21 |
| 9 | 31 | 21 |
| 10 | 32 | 22 |
| 11 | 32 | 22 |
| 12 | 32 | 22 |
| 13 | 32 | 22 |
| 14 | 32 | 22 |
| 15 | 32 | 22 |
| 16 | 32 | 22 |
| 17 | 32 | 22 |
| 18 | 32 | 22 |
| 19 | 32 | 22 |
| 20 | 32 | 22 |
| 21 | 32 | 22 |
| 22 | 32 | 22 |
| 23 | 32 | 22 |
| 24 | 32 | 23 |
| 25 | 32 | 23 |
| 26 | 32 | 23 |
| 27 | 32 | 23 |
| 28 | 32 | 23 |
| 29 | 32 | 23 |
| 30 | 33 | 23 |
| 31 | 33 | 23 |
How December really feels in San Antonio
Once humidity and wind are folded in, December averages 31 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.
The story in December is heat — humidity pushes the afternoon "feels like" well above the raw temperature.
San Antonio weather by month
How December compares with the rest of the year at a glance. December is the 3rd-warmest and 3rd-wettest month here — the current month is highlighted below.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 33° / 23° | 122 | 12.4 | 13.4 | 3.5 |
| Feb | 32° / 23° | 147 | 12.3 | 12.9 | 3.8 |
| Mar | 31° / 21° | 121 | 10.8 | 12.2 | 4.6 |
| Apr | 28° / 19° | 155 | 9.4 | 11.4 | 6.2 |
| May | 24° / 16° | 142 | 8.9 | 10.8 | 7.1 |
| Jun | 23° / 14° | 112 | 8.6 | 10.4 | 7.0 |
| Jul | 23° / 13° | 79 | 7.7 | 10.6 | 7.4 |
| Aug | 25° / 14° | 68 | 6.8 | 11.1 | 7.7 |
| Sep | 27° / 16° | 113 | 8.7 | 11.8 | 6.9 |
| Oct | 29° / 19° | 198 | 12 | 12.6 | 5.4 |
| Nov | 30° / 20° | 188 | 11.1 | 13.2 | 4.9 |
| Dec | 32° / 22° | 165 | 12.6 | 13.6 | 3.9 |
Cloud cover in December
The sky is clear or mostly clear about 41% of the time in December.
Beyond those clear spells, partly cloudy skies cover about 16% of December, with mostly cloudy or overcast conditions the remaining 43%.
| 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 (%) | 54 | 54 | 53 | 53 | 54 | 55 | 55 | 55 | 57 | 57 | 57 | 58 | 58 | 59 | 60 | 60 | 60 | 60 | 60 | 60 | 60 | 60 | 58 | 58 | 57 | 57 | 57 | 56 | 56 | 56 | 56 |
| Cloudier (%) | 46 | 46 | 47 | 47 | 46 | 45 | 45 | 45 | 43 | 43 | 43 | 42 | 42 | 41 | 40 | 40 | 40 | 40 | 40 | 40 | 40 | 40 | 42 | 42 | 43 | 43 | 43 | 44 | 44 | 44 | 44 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 54 | 46 |
| 2 | 54 | 46 |
| 3 | 53 | 47 |
| 4 | 53 | 47 |
| 5 | 54 | 46 |
| 6 | 55 | 45 |
| 7 | 55 | 45 |
| 8 | 55 | 45 |
| 9 | 57 | 43 |
| 10 | 57 | 43 |
| 11 | 57 | 43 |
| 12 | 58 | 42 |
| 13 | 58 | 42 |
| 14 | 59 | 41 |
| 15 | 60 | 40 |
| 16 | 60 | 40 |
| 17 | 60 | 40 |
| 18 | 60 | 40 |
| 19 | 60 | 40 |
| 20 | 60 | 40 |
| 21 | 60 | 40 |
| 22 | 60 | 40 |
| 23 | 58 | 42 |
| 24 | 58 | 42 |
| 25 | 57 | 43 |
| 26 | 57 | 43 |
| 27 | 57 | 43 |
| 28 | 56 | 44 |
| 29 | 56 | 44 |
| 30 | 56 | 44 |
| 31 | 56 | 44 |
Chance of precipitation in December
San Antonio gets around 165 mm of rain over 12.6 wet days in December. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 41% and peaks near 44% 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 (%) | 39 | 40 | 40 | 40 | 40 | 39 | 39 | 39 | 39 | 38 | 38 | 38 | 39 | 39 | 39 | 39 | 40 | 40 | 40 | 41 | 41 | 42 | 43 | 43 | 44 | 44 | 44 | 44 | 44 | 43 | 43 |
| Rain chance (%) | |
|---|---|
| 1 | 39 |
| 2 | 40 |
| 3 | 40 |
| 4 | 40 |
| 5 | 40 |
| 6 | 39 |
| 7 | 39 |
| 8 | 39 |
| 9 | 39 |
| 10 | 38 |
| 11 | 38 |
| 12 | 38 |
| 13 | 39 |
| 14 | 39 |
| 15 | 39 |
| 16 | 39 |
| 17 | 40 |
| 18 | 40 |
| 19 | 40 |
| 20 | 41 |
| 21 | 41 |
| 22 | 42 |
| 23 | 43 |
| 24 | 43 |
| 25 | 44 |
| 26 | 44 |
| 27 | 44 |
| 28 | 44 |
| 29 | 44 |
| 30 | 43 |
| 31 | 43 |
Humidity in December
Most of December feels oppressive — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, December lands in the oppressive band about 49% of days. Sticky, muggy-or-worse air turns up on roughly 82% of them.
| 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 (%) | 3 | 3 | 3 | 3 | 3 | 3 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 |
| Comfortable (%) | 7 | 7 | 7 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 5 | 5 | 5 | 5 | 4 | 4 | 4 | 4 | 4 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 |
| Humid (%) | 16 | 16 | 16 | 15 | 15 | 15 | 14 | 14 | 14 | 14 | 13 | 13 | 13 | 12 | 12 | 12 | 11 | 11 | 11 | 10 | 10 | 10 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 |
| Muggy (%) | 34 | 34 | 33 | 33 | 32 | 32 | 31 | 31 | 30 | 30 | 29 | 29 | 29 | 29 | 29 | 28 | 28 | 28 | 27 | 28 | 27 | 26 | 26 | 25 | 25 | 24 | 24 | 23 | 23 | 22 | 22 |
| Oppressive (%) | 38 | 39 | 40 | 41 | 42 | 43 | 43 | 44 | 45 | 46 | 47 | 48 | 49 | 50 | 50 | 51 | 52 | 51 | 52 | 54 | 54 | 54 | 55 | 55 | 54 | 54 | 53 | 54 | 53 | 54 | 53 |
| Miserable (%) | 1 | 2 | 2 | 2 | 2 | 2 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 4 | 4 | 4 | 5 | 6 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 12 | 13 |
| Dry (%) | Comfortable (%) | Humid (%) | Muggy (%) | Oppressive (%) | Miserable (%) | |
|---|---|---|---|---|---|---|
| 1 | 3 | 7 | 16 | 34 | 38 | 1 |
| 2 | 3 | 7 | 16 | 34 | 39 | 2 |
| 3 | 3 | 7 | 16 | 33 | 40 | 2 |
| 4 | 3 | 6 | 15 | 33 | 41 | 2 |
| 5 | 3 | 6 | 15 | 32 | 42 | 2 |
| 6 | 3 | 6 | 15 | 32 | 43 | 2 |
| 7 | 2 | 6 | 14 | 31 | 43 | 3 |
| 8 | 2 | 6 | 14 | 31 | 44 | 3 |
| 9 | 2 | 6 | 14 | 30 | 45 | 3 |
| 10 | 2 | 6 | 14 | 30 | 46 | 3 |
| 11 | 2 | 5 | 13 | 29 | 47 | 3 |
| 12 | 2 | 5 | 13 | 29 | 48 | 3 |
| 13 | 2 | 5 | 13 | 29 | 49 | 3 |
| 14 | 2 | 5 | 12 | 29 | 50 | 3 |
| 15 | 2 | 4 | 12 | 29 | 50 | 3 |
| 16 | 2 | 4 | 12 | 28 | 51 | 3 |
| 17 | 2 | 4 | 11 | 28 | 52 | 3 |
| 18 | 2 | 4 | 11 | 28 | 51 | 4 |
| 19 | 2 | 4 | 11 | 27 | 52 | 4 |
| 20 | 1 | 3 | 10 | 28 | 54 | 4 |
| 21 | 1 | 3 | 10 | 27 | 54 | 5 |
| 22 | 1 | 3 | 10 | 26 | 54 | 6 |
| 23 | 1 | 3 | 9 | 26 | 55 | 6 |
| 24 | 1 | 3 | 9 | 25 | 55 | 7 |
| 25 | 1 | 3 | 9 | 25 | 54 | 8 |
| 26 | 1 | 3 | 9 | 24 | 54 | 9 |
| 27 | 1 | 3 | 9 | 24 | 53 | 10 |
| 28 | 0 | 3 | 9 | 23 | 54 | 11 |
| 29 | 0 | 3 | 9 | 23 | 53 | 12 |
| 30 | 0 | 3 | 9 | 22 | 54 | 12 |
| 31 | 0 | 3 | 9 | 22 | 53 | 13 |
Wind in December
Winds average 12 km/h in December.
Across December, daily wind ranges from about 11 km/h on the calmest days to 12 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) | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 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 | 12 | calm |
| 2 | 12 | calm |
| 3 | 12 | calm |
| 4 | 12 | calm |
| 5 | 12 | calm |
| 6 | 12 | calm |
| 7 | 12 | calm |
| 8 | 12 | calm |
| 9 | 12 | calm |
| 10 | 12 | calm |
| 11 | 12 | calm |
| 12 | 12 | calm |
| 13 | 12 | calm |
| 14 | 12 | calm |
| 15 | 12 | calm |
| 16 | 12 | calm |
| 17 | 12 | calm |
| 18 | 12 | calm |
| 19 | 12 | calm |
| 20 | 12 | calm |
| 21 | 12 | calm |
| 22 | 12 | calm |
| 23 | 12 | calm |
| 24 | 12 | 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 December
Daylight runs from about 13 h 30 min at the start of December to 13 h 36 min by month's end. The lit band spans sunrise to sunset each day.
Days grow by about 6 minutes over December. Sunrise moves from 5:56 AM to 6:06 AM, and sunset from 7:24 PM to 7:40 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) | 13.5 | 13.5 | 13.5 | 13.5 | 13.5 | 13.5 | 13.5 | 13.5 | 13.5 | 13.5 | 13.6 | 13.6 | 13.6 | 13.6 | 13.6 | 13.6 | 13.6 | 13.6 | 13.6 | 13.6 | 13.6 | 13.6 | 13.6 | 13.6 | 13.6 | 13.6 | 13.6 | 13.6 | 13.6 | 13.6 | 13.6 |
| Sunrise (AM) | 5:56 | 5:56 | 5:56 | 5:56 | 5:56 | 5:56 | 5:57 | 5:57 | 5:57 | 5:57 | 5:57 | 5:58 | 5:58 | 5:58 | 5:59 | 5:59 | 5:59 | 6:00 | 6:00 | 6:01 | 6:01 | 6:02 | 6:02 | 6:03 | 6:03 | 6:04 | 6:04 | 6:05 | 6:05 | 6:06 | 6:06 |
| Sunset (PM) | 7:24 | 7:25 | 7:25 | 7:26 | 7:27 | 7:27 | 7:28 | 7:29 | 7:29 | 7:30 | 7:31 | 7:31 | 7:32 | 7:32 | 7:33 | 7:34 | 7:34 | 7:35 | 7:35 | 7:36 | 7:36 | 7:37 | 7:37 | 7:38 | 7:38 | 7:38 | 7:39 | 7:39 | 7:40 | 7:40 | 7:40 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 13.5 | 5:56 | 7:24 |
| 2 | 13.5 | 5:56 | 7:25 |
| 3 | 13.5 | 5:56 | 7:25 |
| 4 | 13.5 | 5:56 | 7:26 |
| 5 | 13.5 | 5:56 | 7:27 |
| 6 | 13.5 | 5:56 | 7:27 |
| 7 | 13.5 | 5:57 | 7:28 |
| 8 | 13.5 | 5:57 | 7:29 |
| 9 | 13.5 | 5:57 | 7:29 |
| 10 | 13.5 | 5:57 | 7:30 |
| 11 | 13.6 | 5:57 | 7:31 |
| 12 | 13.6 | 5:58 | 7:31 |
| 13 | 13.6 | 5:58 | 7:32 |
| 14 | 13.6 | 5:58 | 7:32 |
| 15 | 13.6 | 5:59 | 7:33 |
| 16 | 13.6 | 5:59 | 7:34 |
| 17 | 13.6 | 5:59 | 7:34 |
| 18 | 13.6 | 6:00 | 7:35 |
| 19 | 13.6 | 6:00 | 7:35 |
| 20 | 13.6 | 6:01 | 7:36 |
| 21 | 13.6 | 6:01 | 7:36 |
| 22 | 13.6 | 6:02 | 7:37 |
| 23 | 13.6 | 6:02 | 7:37 |
| 24 | 13.6 | 6:03 | 7:38 |
| 25 | 13.6 | 6:03 | 7:38 |
| 26 | 13.6 | 6:04 | 7:38 |
| 27 | 13.6 | 6:04 | 7:39 |
| 28 | 13.6 | 6:05 | 7:39 |
| 29 | 13.6 | 6:05 | 7:40 |
| 30 | 13.6 | 6:06 | 7:40 |
| 31 | 13.6 | 6:06 | 7:40 |
Solar energy in December
Average shortwave solar energy reaching the ground each day in December, about 6.73 kWh/m².
For context, solar energy here swings from a low near 2.75 kWh/m² to a high of 6.74 kWh/m² in January across the year — December's 6.73 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) | 6.5 | 6.6 | 6.6 | 6.6 | 6.6 | 6.6 | 6.6 | 6.7 | 6.7 | 6.7 | 6.7 | 6.7 | 6.8 | 6.8 | 6.8 | 6.8 | 6.8 | 6.8 | 6.8 | 6.8 | 6.8 | 6.8 | 6.8 | 6.8 | 6.8 | 6.8 | 6.8 | 6.8 | 6.8 | 6.8 | 6.8 |
| 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 | 6.5 | Intense |
| 2 | 6.6 | Intense |
| 3 | 6.6 | Intense |
| 4 | 6.6 | Intense |
| 5 | 6.6 | Intense |
| 6 | 6.6 | Intense |
| 7 | 6.6 | Intense |
| 8 | 6.7 | Intense |
| 9 | 6.7 | Intense |
| 10 | 6.7 | Intense |
| 11 | 6.7 | Intense |
| 12 | 6.7 | Intense |
| 13 | 6.8 | Intense |
| 14 | 6.8 | Intense |
| 15 | 6.8 | Intense |
| 16 | 6.8 | Intense |
| 17 | 6.8 | Intense |
| 18 | 6.8 | Intense |
| 19 | 6.8 | Intense |
| 20 | 6.8 | Intense |
| 21 | 6.8 | Intense |
| 22 | 6.8 | Intense |
| 23 | 6.8 | Intense |
| 24 | 6.8 | Intense |
| 25 | 6.8 | Intense |
| 26 | 6.8 | Intense |
| 27 | 6.8 | Intense |
| 28 | 6.8 | Intense |
| 29 | 6.8 | Intense |
| 30 | 6.8 | Intense |
| 31 | 6.8 | Intense |
Is December a good time to visit San Antonio?
Our two travel scores rate December for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
December is a weaker month for outdoor sightseeing in San Antonio. The water and warmth also suit a beach or pool day.
What to pack for San Antonio in December
From December's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In December, San Antonio sees daytime highs around 32°C and nights near 22°C. Pack light clothes and sun protection. Worth having: rain gear. About 13 days see rain.
UV index in San Antonio in December
Clear-sky midday UV in December peaks around 13 (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 18 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 23 at about 5 (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) | 15 | 14 | 11 | 9 | 6 | 5 | 5 | 5 | 8 | 7 | 12 | 13 |
| Level | Extreme | Extreme | Extreme | Very high | High | Moderate | Moderate | Moderate | Very high | Very high | Extreme | Extreme |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 15 | Extreme |
| Feb | 14 | Extreme |
| Mar | 11 | Extreme |
| Apr | 9 | Very high |
| May | 6 | High |
| Jun | 5 | Moderate |
| Jul | 5 | Moderate |
| Aug | 5 | Moderate |
| Sep | 8 | Very high |
| Oct | 7 | Very high |
| Nov | 12 | Extreme |
| Dec | 13 | Extreme |
Air quality in San Antonio in December
Average fine-particle pollution (PM2.5) through the year — so you can see where December falls, not just the annual average.
Air quality in San Antonio is worst in September — around 33 µg/m³ PM2.5 (moderate), about 2.7× the cleanest month (December, 12 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) | 16 | 18 | 18 | 13 | 13 | 14 | 17 | 32 | 33 | 21 | 14 | 12 |
| Level | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 16 | Moderate |
| Feb | 18 | Moderate |
| Mar | 18 | Moderate |
| Apr | 13 | Moderate |
| May | 13 | Moderate |
| Jun | 14 | Moderate |
| Jul | 17 | Moderate |
| Aug | 32 | Moderate |
| Sep | 33 | Moderate |
| Oct | 21 | Moderate |
| Nov | 14 | Moderate |
| Dec | 12 | Good |
Where is San Antonio?
San Antonio sits at 25.4°S, 57.5°W, 123 m above sea level, in Paraguay. The nearest listed city is Nemby, 3.0 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 119 m around an average of 105 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 155 m; within 80 km, significant variations in elevation — a maximum elevation change of 529 m.
The land around San Antonio is covered by trees (59%) and artificial surfaces (26%) within 3 km, trees (56%), grassland (20%) and artificial surfaces (20%) within 16 km, and grassland (51%) and trees (42%) within 80 km.
Paraguay travel facts
- Travel advisory
- Level 1
- Exercise Normal Precautions
- Power plugs
- Type A / B / C / N
- 220 V · 50 Hz
- Prices
- ≈ 35% of US
- price level, 2025
- GDP per capita
- $7,027
- 2025
- Happiness
- 6.2 / 10
- World Happiness, 2025
- Safe drinking water
- 64%
- of population, 2024
- Homicide rate
- 6.8
- per 100k, 2023
- Road deaths
- 22
- per 100k/yr, 2019
- Income group
- Upper middle
- World Bank
- English
- Moderate
- EF EPI 531
- 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 (-25.4213°, -57.5472°, elevation 123 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. 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).