San Antonio weather in March

In March, San Antonio sees average daytime highs of 31°C and overnight lows near 21°C, with 121 mm of rain across 10.8 wet days and about 12.2 hours of daylight. It is the 4th-warmest and 8th-wettest month of the year here.

Highs ease over the month, from about 32°C in the first days to 30°C by the end. The sky is clear or mostly clear about 45% of the time in March, and the air most often feels oppressive.

Daylight stretches from about 12 h 36 min at the start of March to 11 h 48 min by month's end. Set against the rest of the year, March is San Antonio's 5th-clearest and 12th-windiest month. For the whole year in context, see San Antonio's year-round climate.

Daytime high
31°
4th warmest
Overnight low
21°
9th coldest
Rainfall
121 mm
10.8 wet days
Daylight
12 h 12 min
6:54 AM – 7:05 PM
Cloud cover
51%
5th clearest
Wind
10 km/h
12th windiest
Solar energy
5.3 kWh/m²
Travel score
4.6
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 March

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 32°C in the first days to 30°C by the end.

A typical March day in San Antonio reaches about 31°C in the afternoon and slips back to 21°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 26°C and 35°C. Set against its neighbours, March runs about 1°C cooler than February and about 3°C warmer than April.

15°20°25°30°35°40°151015202531
Avg high (°C)Avg low (°C)
13222
23222
33222
43222
53222
63222
73222
83222
93122
103122
113122
123122
133122
143122
153122
163122
173121
183121
193121
203121
213121
223021
233021
243021
253021
263021
273021
283020
293020
303020
313020

How March really feels in San Antonio

Once humidity and wind are folded in, March averages 23 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
23
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

The story in March is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

San Antonio weather by month

How March compares with the rest of the year at a glance. March is the 4th-warmest and 8th-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 March

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 45% of the time in March.

Beyond those clear spells, partly cloudy skies cover about 13% of March, with mostly cloudy or overcast conditions the remaining 43%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15644
25644
35743
45743
55743
65743
75743
85743
95743
105743
115644
125644
135644
145644
155644
165743
175743
185743
195743
205743
215842
225842
235941
245941
255941
265941
275941
286040
295941
305941
315941

Chance of precipitation in March

Any precipitation

San Antonio gets around 121 mm of rain over 10.8 wet days in March. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 35% and peaks near 40% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%50%151015202531
Rain chance (%)
140
240
339
439
538
638
738
837
937
1037
1136
1236
1336
1436
1536
1636
1735
1835
1934
2034
2133
2233
2333
2432
2532
2632
2731
2831
2931
3031
3131

Humidity in March

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, March lands in the oppressive band about 44% of days. Sticky, muggy-or-worse air turns up on roughly 79% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1031124566
2031225546
3031226536
4031227526
5021228526
6021228535
7021229525
8021230515
9021230515
10021231514
11021331504
12031331494
13031431494
14031431483
15041531473
16041531463
17051631452
18151732442
19161732432
20161832412
21171832402
22171933391
23271933381
24271934371
25281934361
26281935351
27381935341
28381935341
29381935341
30481935331
31481935331

Wind in March

Winds average 10 km/h in March, the calmest month.

Across March, daily wind ranges from about 10 km/h on the calmest days to 11 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
110calm
210calm
310calm
410calm
510calm
610calm
710calm
810calm
910calm
1010calm
1110calm
1210calm
1310calm
1410calm
1510calm
1610calm
1710calm
1810calm
1910calm
2010calm
2110calm
2210calm
2310calm
2410calm
2511calm
2611calm
2711calm
2811calm
2911calm
3011calm
3111calm

Sunrise & sunset in March

DaylightNight

Daylight runs from about 12 h 36 min at the start of March to 11 h 48 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 48 minutes over March. Sunrise moves from 6:47 AM to 7:01 AM, and sunset from 7:20 PM to 6:49 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.66:477:20
212.56:477:19
312.56:487:18
412.56:487:17
512.56:497:16
612.46:497:16
712.46:507:15
812.46:507:14
912.46:517:13
1012.36:517:12
1112.36:527:11
1212.36:527:10
1312.36:537:09
1412.26:537:07
1512.26:547:06
1612.26:547:05
1712.26:557:04
1812.16:557:03
1912.16:567:02
2012.16:567:01
2112.16:577:00
2212.06:576:59
2312.06:586:58
2412.06:586:57
2512.06:586:56
2611.96:596:55
2711.96:596:54
2811.97:006:52
2911.97:006:51
3011.87:016:50
3111.87:016:49

Solar energy in March

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in March, about 5.3 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 — March's 5.3 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.7Bright
25.7Bright
35.7Bright
45.7Bright
55.7Bright
65.6Bright
75.6Bright
85.6Bright
95.5Bright
105.5Bright
115.5Bright
125.4Bright
135.4Bright
145.3Bright
155.3Bright
165.3Bright
175.2Bright
185.2Bright
195.2Bright
205.1Bright
215.1Bright
225.0Bright
235.0Bright
245.0Bright
255.0Bright
264.9Bright
274.9Bright
284.9Bright
294.9Bright
304.8Bright
314.8Bright
Planning a trip in March

Is March a good time to visit San Antonio?

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

4.6
Sightseeing
9th-best month of the year
6.7
Beach & pool
6th-best month of the year

March is a reasonable time to visit San Antonio for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for San Antonio in March

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

In March, San Antonio sees daytime highs around 31°C and nights near 21°C. Pack light clothes. Worth having: rain gear and sun protection. About 11 days see rain.

light clothesrain gearsun protection

UV index in San Antonio in March

LowModerateHighVery highExtreme

Clear-sky midday UV in March peaks around 11 (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.

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 March

GoodModeratePoorUnhealthyVery unhealthy

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