SAN ANTONIO, TX 78221 Weather Forecast & Current Conditions
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  78221 WEATHER WARNINGS (SEVERE T-STORM & TORNADO)
 CURRENT WEATHER

SAN ANTONIO/STIN, TX
Current Weather
5:53 PM CDT MAY 20, 2026
Few Clouds
84°F
Feels Like: 86°F
Dewpoint: 66°F
Rel. Hum.: 55%
Visibility: 10 miles
Wind: E at 10 mph
Pressure: 29.89 inches
Last 72 hours

Local Area Snow Depth

Texas Current Weather

Texas MOS Forecast Weather


Regional Weather Maps

(Automated weather data from NWS/FAA)
  78221 WEATHER FORECAST
10-Day model forecast maps
2025 Hurricanes

SAN ANTONIO, TX 78221
Weather Forecast

 Snowfall Forecast pages
Snow Depth pages
THIS AFTERNOON
Partly cloudy with a slight chance of showers and thunderstorms. Near steady temperature in the upper 70s. East winds 5 to 10 mph. Chance of rain 20 percent.
TONIGHT
Cloudy with a chance of thunderstorms. A chance of showers in the evening, then showers likely after midnight. Lows in the upper 60s. East winds 5 to 10 mph. Chance of rain 70 percent.
THURSDAY
Cloudy in the morning, then becoming partly cloudy. A chance of thunderstorms. A chance of showers. Highs in the lower 80s. East winds 5 to 10 mph, becoming south in the afternoon. Chance of rain 50 percent.
THURSDAY NIGHT
Mostly cloudy. A chance of showers and thunderstorms, mainly in the evening. Lows in the upper 60s. Southeast winds around 5 mph. Chance of rain 40 percent.
FRIDAY
Mostly cloudy in the morning, then becoming partly cloudy. A slight chance of thunderstorms. A slight chance of showers in the morning, then a chance of showers in the afternoon. Highs in the mid 80s. South winds 5 to 10 mph. Chance of rain 40 percent.
FRIDAY NIGHT
Partly cloudy in the evening, then becoming mostly cloudy. A chance of thunderstorms. A chance of showers in the evening, then showers likely after midnight. Lows around 70. Chance of rain 60 percent.
SATURDAY
Showers likely with a chance of thunderstorms in the morning, then showers with thunderstorms likely in the afternoon. Highs in the lower 80s. Chance of rain 90 percent.
SATURDAY NIGHT
Showers with a chance of thunderstorms in the evening, then mostly cloudy with showers likely with a slight chance of thunderstorms after midnight. Lows in the upper 60s. Chance of rain 80 percent.
SUNDAY
Mostly cloudy in the morning, then becoming partly cloudy. A chance of thunderstorms. A chance of showers in the morning, then showers likely in the afternoon. Highs in the lower 80s. Chance of rain 60 percent.
SUNDAY NIGHT
Partly cloudy. A chance of showers and thunderstorms, mainly in the evening. Lows in the upper 60s. Chance of rain 40 percent.
MEMORIAL DAY
Partly cloudy with a slight chance of showers and thunderstorms. Highs in the mid 80s.
MONDAY NIGHT
Mostly clear in the evening, then becoming partly cloudy. A slight chance of showers and thunderstorms. Lows in the upper 60s.
TUESDAY
Partly cloudy. A slight chance of showers and thunderstorms in the morning, then a chance of showers and thunderstorms in the afternoon. Highs in the mid 80s. Chance of rain 40 percent.

  78221 WEATHER SATELLITE LOOPS
Visible Weather Satellite
SAN ANTONIO, TX 78221
Infrared Weather Satellite
SAN ANTONIO, TX 78221
  78221 WEATHER RADAR LOOP
NEXRAD Weather Radar
SAN ANTONIO, TX 78221
 MOS COMPUTER WEATHER FORECAST

SAN ANTONIO/STIN, TX 3 hourly weather forecast
weather forecast created  8:00 AM EDT  5/20/2026
Wednesday
20 MAY 2026		 SAN ANTONIO, TX 78221 weather forecast Day 1, 12 hours 1 PM 81° 85° Mostly Cloudy 43%
RAIN
***		 0% Thunder
( 41% severe)		 ENE   9 72% 71°
High 83° SAN ANTONIO, TX 78221 weather forecast Day 1, 15 hours 4 PM 82° 86° Mostly Cloudy E   9 69% 71°
Mostly Cloudy

Chance of Rain

 SAN ANTONIO, TX 78221 weather forecast Day 1, 18 hours 7 PM 78° 80° Mostly Cloudy 41%
RAIN
***		 0% Thunder
( 40% severe)		 ENE   9 76% 70°
SAN ANTONIO, TX 78221 weather forecast Day 1, 21 hours 10 PM 75° 75° Mostly Cloudy E   7 84% 70°
Thursday
21 MAY 2026		 SAN ANTONIO, TX 78221 weather forecast Day 2, 0 hours 1 AM 74° 74° Mostly Cloudy 69%
RAIN
***		 0% Thunder
( 30% severe)		 ESE   6 87% 70°
Low 71° SAN ANTONIO, TX 78221 weather forecast Day 2, 3 hours 4 AM 73° 73° Mostly Cloudy ENE   5 90% 70°
High 83° SAN ANTONIO, TX 78221 weather forecast Day 2, 6 hours 7 AM 72° 72° Mostly Cloudy 60%
RAIN
***		 0% Thunder
( 31% severe)		 NA   7 90% 69°

Mostly Cloudy

Rain Likely

 SAN ANTONIO, TX 78221 weather forecast Day 2, 9 hours 10 AM 74° 74° Mostly Cloudy E   7 87% 70°
SAN ANTONIO, TX 78221 weather forecast Day 2, 12 hours 1 PM 78° 80° Mostly Cloudy 36%
RAIN
***		 0% Thunder
( 62% severe)		 SE   8 76% 70°
SAN ANTONIO, TX 78221 weather forecast Day 2, 15 hours 4 PM 79° 82° Mostly Cloudy S   7 74% 70°
SAN ANTONIO, TX 78221 weather forecast Day 2, 18 hours 7 PM 78° 80° Partly Cloudy 38%
RAIN
***		 0% Thunder
( 38% severe)		 SSE   6 79% 71°
SAN ANTONIO, TX 78221 weather forecast Day 2, 21 hours 10 PM 74° 74° Mostly Cloudy ESE   3 87% 70°
Friday
22 MAY 2026		 SAN ANTONIO, TX 78221 weather forecast Day 3, 0 hours 1 AM 72° 72° Mostly Cloudy 12%
RAIN
.01–.1 in		 0% Thunder
( 25% severe)		   CALM 90% 69°
Low 70° SAN ANTONIO, TX 78221 weather forecast Day 3, 3 hours 4 AM 72° 72° Mostly Cloudy SSE   2 90% 69°
High 87° SAN ANTONIO, TX 78221 weather forecast Day 3, 6 hours 7 AM 72° 72° Mostly Cloudy 11%
RAIN
.01–.1 in		 0% Thunder
( 20% severe)		   CALM 90% 69°

Mostly Cloudy

Chance of Rain

 SAN ANTONIO, TX 78221 weather forecast Day 3, 9 hours 10 AM 76° 76° Mostly Cloudy S   6 87% 72°
SAN ANTONIO, TX 78221 weather forecast Day 3, 15 hours 1 PM 81° 85° Mostly Cloudy 21%
RAIN
.1–.25 in		 0% Thunder
( 33% severe)		 S   8 74% 72°
SAN ANTONIO, TX 78221 weather forecast Day 3, 18 hours 4 PM 83° 87° Partly Cloudy S   7 65% 70°
SAN ANTONIO, TX 78221 weather forecast Day 3, 21 hours 7 PM 81° 85° Partly Cloudy     SE   8 72% 71°

SAN ANTONIO/STIN, TX extended weather forecast
Saturday
23 MAY 2026		 Sunday
24 MAY 2026		 Monday
25 MAY 2026		 Tuesday
26 MAY 2026		 Wednesday
27 MAY 2026
Low 72° Low 68° Low 66° Low 67° Low 70°
High 83° High 86° High 90° High 92° High 84°
SAN ANTONIO, TX 78221 weather forecast Day 4 SAN ANTONIO, TX 78221 weather forecast Day 5 SAN ANTONIO, TX 78221 weather forecast Day 6 SAN ANTONIO, TX 78221 weather forecast Day 7 <!--SEARCHED_TOWN_NAME--> weather forecast Day 8
Overcast
53% Rain		 Overcast
50% Rain		 Partly Cloudy
36% Rain		 Partly Cloudy
17% Rain		 Overcast
25% Rain
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