San Antonio weather in March

In March, San Antonio sees average daytime highs of 73°F and overnight lows near 53°F, with 3.1 in of rain across 9.2 wet days and about 11.8 hours of daylight. It is the 8th-warmest and 3rd-wettest month of the year here.

Highs climb over the month, from about 70°F in the first days to 76°F by the end. The sky is clear or mostly clear about 35% of the time in March, and the air most often feels dry.

Daylight stretches from about 11 h 18 min at the start of March to 12 h 12 min by month's end. Set against the rest of the year, March is San Antonio's 12th-clearest and 3rd-windiest month. For the whole year in context, see San Antonio's year-round climate.

Daytime high
73°
8th warmest
Overnight low
53°
5th coldest
Rainfall
3.1 in
9.2 wet days
Daylight
11 h 48 min
6:50 AM – 6:37 PM
Cloud cover
56%
12th clearest
Wind
8 mph
3rd windiest
Solar energy
4.47 kWh/m²
Travel score
6.9
out of 10

San Antonio is city in Bexar, Comal, and Medina counties in Texas, United States; seat of Bexar County.

Density
1,263/km²
people per km²
Founded
1718

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in March

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 70°F in the first days to 76°F by the end.

A typical March day in San Antonio reaches about 73°F in the afternoon and slips back to 53°F overnight — a 20°F spread between the day's warmth and the night's chill. On most days the high lands between 61°F and 83°F. Set against its neighbours, March runs about 6°F warmer than February and about 7°F cooler than April.

40°60°80°151015202531
Avg high (°F)Avg low (°F)
16949
27049
37049
47049
57050
67050
77150
87151
97151
107151
117252
127252
137252
147353
157353
167353
177354
187454
197454
207454
217455
227455
237555
247555
257555
267556
277556
287656
297656
307656
317656

How March really feels in San Antonio

Once humidity and wind are folded in, March averages 0 days that feel above 90°F and 0 that feel at or below 32°F — the comfort signal a plain temperature reading hides.

Days feeling ≥ 90°F
0
heat index over the day's high
Days feeling ≤ 32°F
0
wind chill below the day's low

March 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 March compares with the rest of the year at a glance. March is the 8th-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysDaylight (hours)Travel score
Jan62° / 43°2.27.210.35.8
Feb67° / 46°2.37.410.96.5
Mar73° / 53°3.19.211.86.9
Apr80° / 59°3.18.512.76.8
May86° / 67°4.111.213.55.0
Jun91° / 73°2.79.513.83.6
Jul94° / 74°2.06.213.73.1
Aug95° / 74°1.95.813.12.8
Sep89° / 70°3.08.612.24.3
Oct81° / 61°3.37.711.36.8
Nov71° / 51°2.67.210.57.1
Dec64° / 44°2.57.510.16.1

Cloud cover in March

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 35% of the time in March, the cloudiest month of the year.

Beyond those clear spells, partly cloudy skies cover about 13% of March, with mostly cloudy or overcast conditions the remaining 52%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14852
24852
34852
44852
54852
64753
74753
84753
94753
104852
114852
124852
134852
144852
154951
164951
174852
184753
194852
204852
214852
224852
234951
244951
254951
265050
274951
284951
294951
304951
314951

Chance of precipitation in March

Any precipitation

San Antonio gets around 3.1 in of rain over 9.2 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 30% and peaks near 31% on the wettest days.

0%10%20%30%40%151015202531
Rain chance (%)
128
228
329
429
529
630
730
830
930
1030
1130
1230
1330
1430
1530
1629
1729
1829
1929
2029
2129
2229
2329
2430
2530
2630
2731
2831
2931
3031
3131

Humidity in March

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, March lands in the dry band about 58% of days. Sticky, muggy-or-worse air turns up on roughly 7% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
17213132
27113142
37013143
47013143
56913153
66913153
76713164
86713164
96613174
106514174
116314185
126214195
136214195
146014206
155914216
165914216
175715226
185515237
195515237
205315248
215216248
225116249
235016259
2450162510
2549162410
2648162411
2748172411
2847172412
2946172413
3046172313
3146172314

Wind in March

Winds average 8 mph in March.

Across March, daily wind ranges from about 8 mph on the calmest days to 8 mph at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (mph)Feels
18light breeze
28light breeze
38light breeze
48light breeze
58light breeze
68light breeze
78light breeze
88light breeze
98light breeze
108light breeze
118light breeze
128light breeze
138light breeze
148light breeze
158light breeze
168light breeze
178light breeze
188light breeze
198light breeze
208light breeze
218light breeze
228light breeze
238light breeze
248light breeze
258light breeze
268light breeze
278light breeze
288light breeze
298light breeze
308light breeze
318light breeze

Sunrise & sunset in March

DaylightNight

Daylight runs from about 11 h 18 min at the start of March to 12 h 12 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 54 minutes over March. Sunrise moves from 7:07 AM to 6:32 AM, and sunset from 6:27 PM to 6:46 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.37:076:27
211.47:066:28
311.47:056:29
411.47:046:29
511.57:036:30
611.57:026:31
711.57:016:31
811.57:006:32
911.66:586:33
1011.66:576:33
1111.66:566:34
1211.76:556:35
1311.76:546:35
1411.76:536:36
1511.86:516:36
1611.86:506:37
1711.86:496:38
1811.86:486:38
1911.96:476:39
2011.96:456:39
2111.96:446:40
2212.06:436:41
2312.06:426:41
2412.06:416:42
2512.16:396:42
2612.16:386:43
2712.16:376:44
2812.16:366:44
2912.26:346:45
3012.26:336:45
3112.26:326:46

Solar energy in March

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in March, about 4.47 kWh/m².

For context, solar energy here swings from a low near 2.72 kWh/m² to a high of 6.71 kWh/m² in July across the year — March's 4.47 kWh/m² falls in the middle.

024151015202531
Solar energy (kWh/m²)Level
14.0Bright
24.1Bright
34.1Bright
44.1Bright
54.2Bright
64.2Bright
74.2Bright
84.2Bright
94.3Bright
104.3Bright
114.3Bright
124.3Bright
134.4Bright
144.4Bright
154.4Bright
164.5Bright
174.5Bright
184.5Bright
194.6Bright
204.6Bright
214.6Bright
224.7Bright
234.7Bright
244.7Bright
254.7Bright
264.8Bright
274.8Bright
284.8Bright
294.8Bright
304.9Bright
314.9Bright
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).

6.9
Sightseeing
2nd-best month of the year
5.2
Beach & pool
8th-best month of the year

March is a reasonable time to visit San Antonio for sightseeing.

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 73°F and nights near 53°F. Worth packing: light clothes and rain gear. About 9 days see rain.

light clothesrain gear

UV index in San Antonio in March

LowModerateHighVery highExtreme

Clear-sky midday UV in March peaks around 7 — 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.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highExtremeVery highHighModerateAug 11UV 11Dec 20UV 4
UV index (midday)Level
Jan4Moderate
Feb6High
Mar7Very high
Apr10Very high
May10Extreme
Jun11Extreme
Jul11Extreme
Aug11Extreme
Sep9Very high
Oct6High
Nov5High
Dec4Moderate

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 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).

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1317 µg/m³Oct 246 µg/m³
PM2.5 (µg/m³)Level
Jan7Good
Feb7Good
Mar9Good
Apr10Good
May15Moderate
Jun15Moderate
Jul18Moderate
Aug12Good
Sep10Good
Oct6Good
Nov6Good
Dec7Good
Location & terrain

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.

2 miles
174 ft
10 miles
607 ft
50 miles
1,827 ft
treesshrubsgrasslandcroplandartificial surfacesbare terrain
March weather nearby: Converse 12 mi · Live Oak 14 mi · Universal City 15 mi · Schertz 16 mi · Cibolo 19 mi · New Braunfels 29 mi · Seguin 34 mi · Canyon Lake 34 mi

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
Protestant 47%unaffiliated 23%Roman Catholic 21%Jewish 2%

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. 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).