San Antonio weather in April

In April, San Antonio sees average daytime highs of 80°F and overnight lows near 59°F, with 3.1 in of rain across 8.5 wet days and about 12.7 hours of daylight. It is the 7th-warmest and 4th-wettest month of the year here.

Highs climb over the month, from about 77°F in the first days to 82°F by the end. The sky is clear or mostly clear about 37% of the time in April, and the air most often feels dry.

Daylight stretches from about 12 h 18 min at the start of April to 13 h 06 min by month's end. Set against the rest of the year, April is San Antonio's 7th-clearest and 1st-windiest month. For the whole year in context, see San Antonio's year-round climate.

Daytime high
80°
7th warmest
Overnight low
59°
6th coldest
Rainfall
3.1 in
8.5 wet days
Daylight
12 h 42 min
6:13 AM – 6:55 PM
Cloud cover
53%
7th clearest
Wind
8 mph
1st windiest
Solar energy
5.48 kWh/m²
Travel score
6.8
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 April

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 77°F in the first days to 82°F by the end.

A typical April day in San Antonio reaches about 80°F in the afternoon and slips back to 59°F overnight — a 20°F spread between the day's warmth and the night's chill. On most days the high lands between 71°F and 88°F. Set against its neighbours, April runs about 7°F warmer than March and about 6°F cooler than May.

40°60°80°151015202530
Avg high (°F)Avg low (°F)
17656
27656
37757
47757
57757
67757
77857
87858
97858
107858
117958
127958
137959
147959
158059
168059
178060
188060
198060
208160
218161
228161
238161
248261
258262
268262
278262
288262
298363
308363

How April really feels in San Antonio

Once humidity and wind are folded in, April 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

April 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 April compares with the rest of the year at a glance. April is the 7th-warmest and 4th-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 April

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 37% of the time in April.

Beyond those clear spells, partly cloudy skies cover about 14% of April, with mostly cloudy or overcast conditions the remaining 48%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15050
25050
35149
45149
55248
65248
75248
85248
95248
105347
115446
125347
135347
145347
155347
165347
175347
185347
195347
205248
215248
225248
235149
245149
255149
265149
275149
285050
295050
304951

Chance of precipitation in April

Any precipitation

San Antonio gets around 3.1 in of rain over 8.5 wet days in April. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 28% and peaks near 32% on the wettest days.

0%10%20%30%40%151015202530
Rain chance (%)
131
231
330
430
530
629
729
828
928
1027
1127
1226
1326
1426
1526
1626
1726
1827
1927
2027
2128
2228
2328
2429
2529
2630
2730
2831
2931
3032

Humidity in April

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, April lands in the dry band about 37% of days. Sticky, muggy-or-worse air turns up on roughly 26% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1451722150
2451722150
3451721161
4451721161
5441721171
6441721171
7431721181
8431721181
9421721191
10421721191
11411721201
12401622211
13401622211
14391622221
15381622231
16371622231
17361523242
18361523252
19351522252
20341522262
21331522263
22331522273
23321522283
24311422294
25311422294
26301321305
27301321315
28291220326
29291220337
30281119348

Wind in April

Winds average 8 mph in April, the windiest month of the year.

Across April, 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.

051015151015202530
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

Sunrise & sunset in April

DaylightNight

Daylight runs from about 12 h 18 min at the start of April to 13 h 06 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 48 minutes over April. Sunrise moves from 6:31 AM to 5:59 AM, and sunset from 6:47 PM to 7:04 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.36:316:47
212.36:296:47
312.36:286:48
412.46:276:48
512.46:266:49
612.46:256:50
712.46:236:50
812.56:226:51
912.56:216:51
1012.56:206:52
1112.66:196:52
1212.66:186:53
1312.66:166:54
1412.76:156:54
1512.76:146:55
1612.76:136:55
1712.76:126:56
1812.86:116:57
1912.86:106:57
2012.86:096:58
2112.86:076:58
2212.96:066:59
2312.96:057:00
2412.96:047:00
2513.06:037:01
2613.06:027:02
2713.06:017:02
2813.06:007:03
2913.15:597:03
3013.15:597:04

Solar energy in April

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in April, about 5.48 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 — April's 5.48 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.0Bright
25.0Bright
35.1Bright
45.1Bright
55.2Bright
65.2Bright
75.2Bright
85.3Bright
95.3Bright
105.3Bright
115.4Bright
125.4Bright
135.4Bright
145.5Bright
155.5Bright
165.5Bright
175.5Bright
185.5Bright
195.6Bright
205.6Bright
215.6Bright
225.6Bright
235.6Bright
245.6Bright
255.6Bright
265.7Bright
275.7Bright
285.7Bright
295.7Bright
305.7Bright
Planning a trip in April

Is April a good time to visit San Antonio?

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

6.8
Sightseeing
3rd-best month of the year
6.7
Beach & pool
4th-best month of the year

April 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 April

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

In April, San Antonio sees daytime highs around 80°F and nights near 59°F. Worth packing: light clothes, rain gear and sun protection. About 9 days see rain.

light clothesrain gearsun protection

UV index in San Antonio in April

LowModerateHighVery highExtreme

Clear-sky midday UV in April peaks around 10 (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 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 April

GoodModeratePoorUnhealthyVery unhealthy

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