Weather StoryAlmanac, microseasons, and the day's weather story.

San Antonio, Texas Weather

Dusk arrives one minute earlier each night. Day 43 of summer. Read this microseason across nine climate regions →

San Antonio weather forecast — hour by hour, 7-day outlook, NOAA radar

San Antonio, TX
Sunday, August 2 at 1:34 AM
83
°
Overcast
Feels like
89°
Humidity
64%
Wind
4 mph
Sunrise
1:54 AM
Sunset
3:25 PM
San Antonio, TX
Hour by hour · 24h
24-Hour ForecastSan Antonio, TX: 24-hour forecast. Temperatures range from 80 to 100 degrees Fahrenheit.
L 80°H 100°
San Antonio, TX
7-day forecast
  1. Today
    Aug 2
    Overcast
    13%
    —
    100°80°—
  2. Monday
    Aug 3
    Light Showers
    —
    0.01″
    100°75°0°
  3. Tuesday
    Aug 4
    Mostly Clear
    —
    —
    101°78°+1°
  4. Wednesday
    Aug 5
    Mostly Clear
    —
    —
    101°78°0°
  5. Thursday
    Aug 6
    Light Drizzle
    —
    —
    99°78°-2°
  6. Friday
    Aug 7
    Light Drizzle
    —
    —
    99°77°0°
  7. Saturday
    Aug 8
    Partly Cloudy
    —
    —
    99°76°0°
San Antonio, TX
Next 24 hours · Warm now
HOT 90°76°90°104°6a12p6p12anow 83°high 100°low 80°PRECIP %
San Antonio, TX
Anemometer · 24h winds · from true
NESW
From · True
NNW
338° · veering 158°
Direction
NNW
338°
Sustained
4
mph
Gust
9
mph
Peak 24h
21
avg 5 mph
Beaufort · 2 · LIGHT BRZ
0
CALM
<1
1
LIGHT AIR
1–3
2
LIGHT BRZ
4–7
3
GENTLE BRZ
8–12
4
MOD BRZ
13–18
5
FRESH BRZ
19–24
6
STRONG BRZ
25–31
7
NEAR GALE
32–38
24h · sust vs gust · mph
avg 5 mph · pk 21 mph @ 8:00p
010MPHB1B2B3B4-21h-18h-15h-12h-9h-6h-3h-24hNOWpk 121SUSTGUST
−24h−18h−12h−6hnow
Light breeze veering 158° from the nnw.
San Antonio, TX
Barometer · 24h pressure · mb
STORMRAINCHANGEFAIRDRY9901000101010201030
Pressure · mb
985.8
-0.1 mb in 3h · steady · 29.11 inHg
Now
985.8
mb
3h
-0.1
mb
12h
-3.2
mb
24h
-2.6
mb
Regime · STORM
STORM
RAIN
CHANGE
FAIR
DRY
24h · Pressure · mb
range 985–989
9809859909951000STORM|RAIN10051010RAIN|CHG1015CHG|FAIR10201025FAIR|DRY1030-21h-18h-15h-12h-9h-6h-3h-24hNOW989.2984.9985.3
Deep low — expect rough seas, strong wind, and persistent rain.
San Antonio, TX
Air quality
39
AQI
Good
→-3 in 6h▲Peak ~53 @ 1 PM

AQI 39 (Good), driven by PM2.5. AQI flat over the last 6 hours (within ±3 points). PM2.5 at 18.6 µg/m³ (AQI 69) with a 0.96 fine-to-coarse ratio and 4 mph wind — combustion smoke trapped in stagnant air, not road dust.

OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion during the projected peak around 1 PM.

PM 2.5DRIVERModerate
18.6μg/m³
PM 10Good
19μg/m³
NO₂Moderate
32μg/m³
OzoneGood
22μg/m³
UV IndexLow
0.0

What's driving it

PM × Wind × Precip

PM2.5 at 18.6 µg/m³ (AQI 69) with a 0.96 fine-to-coarse ratio and 4 mph wind — combustion smoke trapped in stagnant air, not road dust.

PM2.5/PM10
0.96
Wind
calm
Recent rain
0h in last 6h
Pattern
stagnant smoke

Trends

Seven days of AQI and PM2.5.

Hourly air-quality data from the Copernicus Atmosphere Monitoring Service, charted across the past and next several days. Dashed lines mark the AQI breakpoints at 50 (Good → Moderate) and 100 (Moderate → Unhealthy for Sensitive Groups).

7-DAY AQI TREND50100SUNMONTUEWEDTHUFRISATSUN7-DAY PM2.5 TREND · μg/m³300
San Antonio, TX
Sky cover · visibility · 24h
Cloud cover
100%
OVERCAST
100%0%−24h−18h−12h−6hnow
Visibility
53.0mi
UNLIMITED
115 mi0 mi−24h−18h−12h−6hnow
Earth · GOES-19 ABI
Full Disk · Visible · GeoColor
GOES-19 full disk Visible · GeoColor
True-color daytime, blue/IR sandwich at night
06:34 UTC · San Antonio, TX · NOAA NESDIS / STAR · up to 10848 px
Continental US · GOES-19 ABI
CONUS Sector · Visible · GeoColor
GOES-19 CONUS Visible · GeoColor
Daytime true-color, blue-light/IR sandwich at night
06:34 UTC · San Antonio, TX · NOAA NESDIS / STAR · 5-min cadence · up to 10000 px
San Antonio, TX
Satellite · infrared · animated
San Antonio, TX
Loading IR frames…
IR · cloud-top temp© RainViewer · Carto
San Antonio, TX
Almanac · Sunday, August 2
Red sky at night, sailor's delight.
Civil dawn
6:29 AM
Sunrise
1:54 AM
Daylight
13h 31m
Sunset
3:25 PM
Civil dusk
8:53 PM
Planting note
Sow fall peas. Start kale and collard seedlings for fall.
San Antonio, TX
The moon
Waning Gibbous
87% illuminated
Moonrise
10:16 PM
Moonset
10:39 AM
In sign
♓︎ Pisces
San Antonio, TX
Microseason
Aug 1–5

Dusk arrives one minute earlier each night

celestial
Jan 158% of the yearDec 31

Read this microseason across nine climate regions →

San Antonio at a glance

  • Today vs. normal: 10°F above the seasonal normal for this latitude
  • Last frost: February 12 (climatological average for this latitude)
  • Microseason: Aug 1–5
  • Planting window: Sow fall peas. Start kale and collard seedlings for fall.

ZIP codes: 78201, 78202, 78203, 78204, 78205, 78207, 78208, 78209 +51 more

15-Day Forecast — San Antonio

  1. Sun100°80°13%
  2. Mon100°75°1%
  3. Tue101°78°1%
  4. Wed101°78°1%
  5. Thu99°78°3%
  6. Fri99°77°3%
  7. Sat99°76°1%
  8. Sun97°76°3%
  9. Mon102°76°3%
  10. Tue102°76°2%
  11. Wed101°76°4%
  12. Thu103°76°6%
  13. Fri101°77°0%
  14. Sat104°75°3%
  15. Sun104°76°6%

Forecast data from Open-Meteo (CC BY 4.0).

Live wind & temperature near San Antonio

Right now in the garden

Peak growing season

As of August 2, the growing season is at its peak — frost is months away. Continue succession-planting beans and summer squash. Start fall brassicas (broccoli, cabbage, kale) from seed indoors for transplanting in late summer.

SPC Convective Outlook

Storm Prediction Center — San Antonio

SPC includes San Antonio in the general thunderstorm area today — no severe risk, but storms are possible.

  • TODAYTSTMGeneral Thunderstorms
  • TOMORROWNONENo severe risk
  • DAY 3NONENo severe risk

Thunderstorms possible. Not severe, but capable of producing lightning and brief heavy rain.

Source: NOAA / NWS Storm Prediction Center categorical convective outlook. Outlooks are re-issued multiple times per day; this page reflects the most recent SPC polygons covering the city’s coordinates.

Sun & seasons in San Antonio

San Antonio sits in Bexar County, where the year’s longest day runs 14h 2m of daylight and its shortest just 10h 15m — a swing of +3h 47m between the June and December solstices. Clocks spring forward on Sunday, March 8, 2026 and fall back on Sunday, November 1, 2026.

Houston, the state’s largest city, lies about 190 miles to the E. The nearest town San Antonio tracks is Buda, roughly 59 miles to the NE.

Air quality in San Antonio’s county has trended cleaner since 2020; its cleanest year on record was 2023 (median AQI 52). See the full air-quality history for San Antonio.

January 1–5: Frost quiets the live oaks.January 6–10: Still water thickens with ice.January 11–15: Springs begin to move beneath ice.January 16–20: Cardinal dawn calls grow bolder.January 21–25: Late January thaw pulses.January 26–31: Last freeze locks the land.February 1–5: February's lengthening light.February 6–10: Warming winds thaw the margin.February 11–15: Magnolia blooms break the gray.February 16–20: Mockingbirds resume the dawn chorus.February 21–25: Rain replaces the last snow.February 26–28: Mist clings to greening valleys.March 1–5: The green pulse awakens.March 6–10: Hibernators emerge to call.March 11–15: Dogwood and redbud ignite.March 16–20: Swallowtails emerge from winter silk.March 21–25: Light crowns the dogwood canopy.March 26–31: Redbud cascades over the thaw.April 1–5: Thunder announces the wet season.April 6–10: Barn swallows carve the warming sky.April 11–15: Magnolia blooms and falls in a breath.April 16–20: First rainbows arch over thunderheads.April 21–25: Reeds push through marsh water.April 26–30: Frost retreats; seedlings rise free.May 1–5: Warblers flood the canopy in waves.May 6–10: Tulip poplar lights the forest crown.May 11–15: Shad pulse upstream through rapids.May 16–20: Roses open on the Piedmont edge.May 21–25: Fireflies scout the humid dusk.May 26–31: Frog choruses rise from every wetland.June 1–5: Fireflies pulse through the magnolias.June 6–10: Kudzu climbs deeper into green.June 11–15: Sun climbs to its northern throne.June 16–20: Heat settles and the rain begins.June 21–25: The longest day turns toward shadow.June 26–30: Fireflies drift through Spanish moss.July 1–5: Cicadas claim the scorching afternoon.July 6–10: Thunderheads boil and break at dusk.July 11–15: Thunder builds each drowsy afternoon.July 16–20: Cicadas claim the long noon.July 21–25: Dog days drape the earth in haze.July 26–31: Katydids begin their rasping chorus.August 1–5: Dusk arrives one minute earlier each night.August 6–10: Meteorological summer's turning page.August 11–15: Cool winds gather at the margins.August 16–20: Dog-day cicadas rise.August 21–25: Heat breaks in creek beds.August 26–31: Monarchs gather strength.September 1–5: Harvests begin in earnest.September 6–10: Dew beads on resurrection fern.September 11–15: Raptors trail the thermals.September 16–20: Day and dark find balance.September 21–25: Thunder quiets the land.September 26–30: Insects retreat below.October 1–5: Swamp waters recede.October 6–10: Maples ignite the ridge.October 11–15: Asters crown the meadows.October 16–20: Crickets sing at dusk.October 21–25: Frost paints the garden.October 26–31: Light rains whisper down.November 1–5: Sweetgum Turns Crimson.November 6–10: Camellia Blooms Break Through.November 11–15: Earth Stiffens Underfoot.November 16–20: Bare Limbs Hold the Light.November 21–25: First Frost Grips the High Ground.November 26–30: North Wind Strips the Last Leaves.December 1–5: Darkness Falls Before Dinner.December 6–10: Winter Locks the Land.December 11–15: Wildlife Retreats to Shelter.December 16–20: Ice Edges Deepen Inward.December 21–25: The Sun Begins its Return.December 26–31: The Year Turns in Silence.🌱February 14 — First skunk-cabbage spathes thaw their way up☀️March 20 — Spring equinox — day and night balance🌸April 5 — Cherry blossoms peak in the parks🐦May 10 — Warbler migration peaks along the coast✨May 25 — First fireflies scout the meadows at dusk🌞June 21 — Summer solstice — longest day🦗July 25 — Peak cicada chorus in the afternoons🌊August 18 — Warmest sea-surface temperatures of the year🍂September 22 — Autumn equinox — the slow turn❄️October 25 — First widespread frost in the suburbs🍁November 10 — Peak leaf color across the Hudson Valley🌙December 21 — Winter solstice — longest night

Microseason · August 1–5

Dusk arrives one minute earlier each night

Sunset slides back toward 8 PM; darkness creeps in, signaling summer's decline though heat persists.

Day 214 of 365 · Wedge 43 of 72

The solar year drawn as a wheel of 72 five-day windows. Each wedge is one microseason; the four colored arcs mark winter, spring, summer, and autumn; the small icons sit at notable phenological events. The crimson pointer creeps clockwise as the year turns.

Planting calendar

MonthPlantHarvest
January——
Februarylettuce, peas, spinach, radishes—
Marchlettuce, peas, spinach, radishes, tomatoes, peppers, beans, squash—
Apriltomatoes, peppers, beans, squash—
Maytomatoes, peppers, beans, squashlettuce, peas, radishes
June—lettuce, peas, radishes
July—tomatoes, beans, summer squash
August—tomatoes, beans, summer squash
September—tomatoes, beans, summer squash
Octoberfall brassicas, garlic (overwinter), carrotswinter squash, tomatoes (last)
Novemberfall brassicas, garlic (overwinter), carrots—
December——

A year in weather

August is San Antonio's warmest stretch (~85°F) and January its coldest (~52°F); precipitation crests in May at 3.6 inches and ebbs in July to 1.6 inches.

MonthMean tempPrecipRainy days
January52°2.3″12
February55°2.1″13
March62°2.4″16
April69°3.5″17
May76°3.6″21
June82°2.5″15
July85°1.6″11
August85°1.8″12
September80°2.4″13
October72°2.6″12
November61°2.4″14
December53°2.0″13

Regional context

In San Antonio, NOAA NCEI 1991-2020 normals put January near 52°F and July near 85°F — a 33°F seasonal arc — with about 29.3 inches of precipitation over 169 rainy or snowy days.

San Antonio's precipitation spreads evenly: May peaks at 3.6 inches on 21.2 wet days, while July holds 1.6 inches over 10.6 — no month dominates San Antonio's rain calendar. That lines San Antonio up with places like Olmos Park, TX, Balcones Heights, TX and Alamo Heights, TX, fed by overlapping storm tracks.

With a coldest-month mean of 52°F, San Antonio stays mostly frost-free and grows year-round. The August peak near 85°F is San Antonio's real limit, pushing cool-season vegetables to spring and fall. Across San Antonio, elevation and tree cover drive a 4-7°F spread in San Antonio's overnight lows.

Similar climates: Olmos Park, TX, Balcones Heights, TX, Alamo Heights, TX, Castle Hills, TX, Terrell Hills, TX.

Naturalist notes

Late May brings the peak bloom of prickly pear cactus, their yellow flowers opening across the South Texas landscape.

Painted buntings return to San Antonio in late April, the males' brilliant blue heads and red underparts appearing at backyard feeders.

Frequently asked

When does it freeze in San Antonio?
In San Antonio, expect the last spring frost near mid-February; San Antonio's first autumn frost comes around mid-December.
What is the rainy season in San Antonio?
Rainfall in San Antonio peaks in May near 3.6 inches, out of about 29 inches annually.
What is the warmest month in San Antonio?
The warmest stretch in San Antonio comes in August, around 85°F on average.
What is the coldest month in San Antonio?
On average January is the chilliest month in San Antonio, about 52°F.
When can I start a vegetable garden in San Antonio?
San Antonio's last frost (mid-February) cues hardy greens; in San Antonio, hold heat-lovers two weeks past.
How many rainy days does San Antonio get?
Expect roughly 169 wet days a year in San Antonio.
What hardiness zone is San Antonio?
San Antonio's USDA zone comes from its January mean (52°F); enter the ZIP on the USDA lookup for the number.
What is the 10-day forecast for San Antonio?
San Antonio's extended outlook — daily high and low temperatures and precipitation chances for each upcoming day — is in the daily forecast above.
Will it rain this week in San Antonio?
See this week's day-by-day rain chances for San Antonio in the daily forecast above, and the next 24 hours in the hourly chart.
What is the weather like right now in San Antonio?
Current conditions for San Antonio and the next 24 hours — temperature, precipitation chance, and wind by the hour — are in the hourly forecast chart above.
How often is the San Antonio forecast updated?
The San Antonio forecast on this page is built from Open-Meteo weather-model data and refreshes regularly through the day.
When are sunrise and sunset in San Antonio?
Today's sunrise and sunset times for San Antonio are in the Almanac section above, along with civil dawn, civil dusk, and day length. Day length is longest near the summer solstice and shortest near the winter solstice.
How accurate is the weather forecast for San Antonio?
The next few days in San Antonio's forecast are the most reliable; accuracy declines beyond about a week as weather-model uncertainty grows.

Climate

San Antonio's humid subtropical climate in Texas pairs 52°F Januarys with 85°F Julys, 33°F apart across the seasons.

Yearly precipitation in San Antonio totals around 29 inches, spread over about 169 days of rain or snow.

The 33°F gap between San Antonio's summer and winter, at 29.5°N, shapes San Antonio's frost calendar.

All cities in Texas →

Houston, TX weather →

ZIP codes in San Antonio

  • 78112
  • 78239
  • 78259
  • 78258
  • 78252
  • 78251
  • 78250
  • 78257
  • 78256
  • 78255
  • 78254
  • 78208
  • 78201
  • 78202
  • 78203
  • 78204
  • 78205
  • 78207
  • 78245
  • 78242
  • 78248
  • 78231
  • 78230
  • 78233
  • 78232
  • 78235
  • 78234
  • 78237
  • 78238
  • 78209
  • 78109
  • 78266
  • 78264
  • 78260
  • 78219
  • 78218
  • 78217
  • 78216
  • 78215
  • 78214
  • 78213
  • 78212
  • 78211
  • 78210
  • 78244
  • 78247
  • 78240
  • 78249
  • 78073
  • 78023
  • 78222
  • 78223
  • 78220
  • 78221
  • 78226
  • 78227
  • 78224
  • 78225
  • 78228
  • 78229
  • 78206
  • 78241
  • 78246
  • 78265
  • 78268
  • 78269
  • 78270
  • 78278
  • 78279
  • 78280
  • 78283
  • 78284
  • 78285
  • 78288
  • 78289
  • 78291
  • 78292
  • 78293
  • 78294
  • 78295
  • 78296
  • 78297
  • 78298
  • 78299

Climate normals from the Open-Meteo Climate API. Köppen approximation from NOAA NCEI U.S. Climate Regions. See methodology for data sources, editorial rules, and corrections. Maintainer: Brian Tighe.