San Antonio weather in August

In August, San Antonio sees average daytime highs of 25°C and overnight lows near 14°C, with 68 mm of rain across 6.8 wet days and about 11.1 hours of daylight. It is the 9th-warmest and 12th-wettest month of the year here.

Highs climb over the month, from about 24°C in the first days to 26°C by the end. The sky is clear or mostly clear about 55% of the time in August, and the air most often feels dry.

Daylight stretches from about 10 h 48 min at the start of August to 11 h 30 min by month's end. Set against the rest of the year, August is San Antonio's 1st-clearest and 1st-windiest month. For the whole year in context, see San Antonio's year-round climate.

Daytime high
25°
9th warmest
Overnight low
14°
3rd coldest
Rainfall
68 mm
6.8 wet days
Daylight
11 h 06 min
7:21 AM – 6:27 PM
Cloud cover
40%
1st clearest
Wind
15 km/h
1st windiest
Solar energy
4.04 kWh/m²
Travel score
7.7
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 August

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 24°C in the first days to 26°C by the end.

A typical August day in San Antonio reaches about 25°C in the afternoon and slips back to 14°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 17°C and 33°C. Set against its neighbours, August runs about 3°C warmer than July and about 2°C cooler than September.

10°20°30°151015202531
Avg high (°C)Avg low (°C)
12413
22413
32413
42414
52414
62414
72414
82414
92514
102514
112514
122514
132514
142514
152514
162514
172514
182515
192515
202515
212515
222615
232615
242615
252615
262615
272615
282615
292615
302615
312615

How August really feels in San Antonio

Once humidity and wind are folded in, August averages 0 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C
0
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

August 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 August compares with the rest of the year at a glance. August is the 9th-warmest and 12th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan33° / 23°12212.413.43.5
Feb32° / 23°14712.312.93.8
Mar31° / 21°12110.812.24.6
Apr28° / 19°1559.411.46.2
May24° / 16°1428.910.87.1
Jun23° / 14°1128.610.47.0
Jul23° / 13°797.710.67.4
Aug25° / 14°686.811.17.7
Sep27° / 16°1138.711.86.9
Oct29° / 19°1981212.65.4
Nov30° / 20°18811.113.24.9
Dec32° / 22°16512.613.63.9

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 55% of the time in August, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 9% of August, with mostly cloudy or overcast conditions the remaining 35%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16337
26337
36337
46337
56337
66238
76238
86238
96337
106337
116337
126337
136337
146337
156337
166436
176436
186535
196535
206634
216634
226733
236733
246733
256931
266931
276931
286931
296931
306931
316931

Chance of precipitation in August

Any precipitation

San Antonio gets around 68 mm of rain over 6.8 wet days in August, the driest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 22% and peaks near 23% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
122
222
322
422
522
623
723
823
923
1023
1123
1223
1323
1423
1523
1622
1722
1822
1922
2021
2121
2221
2321
2421
2521
2621
2721
2822
2922
3022
3122

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

Most of August feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, August lands in the dry band about 46% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
15027213
24927213
34927213
44927213
54927223
64927223
74927223
84927223
94927223
104826224
114826224
124826224
134826224
144826224
154726234
164726234
174626234
184627244
194527244
204427245
214427255
224327255
234327255
244326265
254226266
264226266
274226266
284225267
294225267
304126268
314026268

Wind in August

Winds average 15 km/h in August, the windiest month of the year.

Across August, daily wind ranges from about 14 km/h on the calmest days to 15 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
114light breeze
214light breeze
314light breeze
414light breeze
514light breeze
614light breeze
714light breeze
815light breeze
915light breeze
1015light breeze
1115light breeze
1215light breeze
1315light breeze
1415light breeze
1515light breeze
1615light breeze
1715light breeze
1815light breeze
1915light breeze
2015light breeze
2115light breeze
2215light breeze
2315light breeze
2415light breeze
2515light breeze
2615light breeze
2715light breeze
2815light breeze
2915light breeze
3015light breeze
3115light breeze

Sunrise & sunset in August

DaylightNight

Daylight runs from about 10 h 48 min at the start of August to 11 h 30 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 42 minutes over August. Sunrise moves from 7:32 AM to 7:07 AM, and sunset from 6:20 PM to 6:34 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
110.87:326:20
210.87:326:21
310.87:316:21
410.97:306:22
510.97:306:22
610.97:296:23
710.97:286:23
810.97:286:24
911.07:276:24
1011.07:266:25
1111.07:256:25
1211.07:256:26
1311.07:246:26
1411.17:236:26
1511.17:226:27
1611.17:216:27
1711.17:206:28
1811.17:196:28
1911.27:196:29
2011.27:186:29
2111.27:176:30
2211.27:166:30
2311.37:156:30
2411.37:146:31
2511.37:136:31
2611.37:126:32
2711.47:116:32
2811.47:106:33
2911.47:096:33
3011.47:086:33
3111.57:076:34

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 4.04 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 — August's 4.04 kWh/m² falls in the middle.

024151015202531
Solar energy (kWh/m²)Level
13.6Moderate
23.6Moderate
33.6Moderate
43.7Moderate
53.7Moderate
63.7Moderate
73.7Moderate
83.8Moderate
93.8Moderate
103.8Moderate
113.9Moderate
123.9Moderate
133.9Moderate
143.9Moderate
154.0Moderate
164.0Bright
174.0Bright
184.1Bright
194.1Bright
204.2Bright
214.2Bright
224.2Bright
234.3Bright
244.3Bright
254.3Bright
264.4Bright
274.4Bright
284.5Bright
294.5Bright
304.5Bright
314.5Bright
Planning a trip in August

Is August a good time to visit San Antonio?

Our two travel scores rate August for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

7.7
Sightseeing
1st-best month of the year
6.9
Beach & pool
3rd-best month of the year

August is one of the better times to visit San Antonio for general sightseeing. The water and warmth also suit a beach or pool day.

What to pack for San Antonio in August

From August's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In August, San Antonio sees daytime highs around 25°C and nights near 14°C. Worth packing: light clothes. About 7 days see rain.

light clothes

UV index in San Antonio in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August peaks 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 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.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highHighModerateVery highExtremeJan 18UV 14Jun 23UV 5
UV index (midday)Level
Jan15Extreme
Feb14Extreme
Mar11Extreme
Apr9Very high
May6High
Jun5Moderate
Jul5Moderate
Aug5Moderate
Sep8Very high
Oct7Very high
Nov12Extreme
Dec13Extreme

Air quality in San Antonio in August

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where August 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).

010203040JanFebMarAprMayJunJulAugSepOctNovDecModerateSep 933 µg/m³Dec 1312 µg/m³
PM2.5 (µg/m³)Level
Jan16Moderate
Feb18Moderate
Mar18Moderate
Apr13Moderate
May13Moderate
Jun14Moderate
Jul17Moderate
Aug32Moderate
Sep33Moderate
Oct21Moderate
Nov14Moderate
Dec12Good
Location & terrain

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.

3 km
119 m
16 km
155 m
80 km
529 m
treesgrasslandcroplandartificial surfaceswaterwetland
August weather nearby: Nemby 3.0 km · Villa Elisa 8.0 km · Fernando de la Mora 10 km · San Lorenzo 10 km · Lambaré 10 km · Capiatá 13 km · Asuncion 18 km · Itauguá 20 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
Roman Catholic 80%Protestant 7%Believer 6%other 1%

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).