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
6:53 PM CDT AUG 19, 2026
Clear 99°F
Feels Like:	97°F
Dewpoint:	54°F
Rel. Hum.:	22%
Visibility:	10 miles
Wind:	SSE at 9 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 2026 Hurricanes	SAN ANTONIO, TX 78221 Weather Forecast	Snowfall Forecast pages Snow Depth pages

TONIGHT
Partly cloudy. Lows in the mid 70s. South winds 10 to 15 mph.

THURSDAY
Partly cloudy in the morning, then clearing. Hot with highs around 101. South winds 5 to 10 mph.

THURSDAY NIGHT
Mostly clear. Lows in the mid 70s. Southeast winds 10 to 15 mph.

FRIDAY
Mostly sunny. Hot with highs around 101. South winds around 5 mph.

FRIDAY NIGHT
Mostly clear. Lows in the mid 70s. South winds 5 to 10 mph.

SATURDAY THROUGH SUNDAY
Mostly clear. Hot. Highs around 100. Lows in the upper 70s. Highest heat index readings up to 105.

SUNDAY NIGHT
Clear. Lows in the mid 70s.

MONDAY
Partly cloudy in the morning, then clearing. Hot with highs around 100.

MONDAY NIGHT
Clear. Lows in the mid 70s.

TUESDAY
Partly cloudy in the morning, then clearing. Hot with highs around 100. Highest heat index readings up to 105.

TUESDAY NIGHT
Clear. Lows in the mid 70s.

WEDNESDAY
Partly cloudy in the morning, then clearing. Hot with highs around 100.

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 8/19/2026

DAY/DATE &
WEATHER FORECAST SUMMARY

TIME
CDT

TEMP
(deg. F)

FEELS
LIKE

CLOUD
COVER

PRECIP
PROB.

THUNDER
PROB.

WIND
dir./mph

REL
HUM

DEWPT
(deg. F)

Wednesday
19 AUG 2026

1 PM

96°

99°

Partly Cloudy

0% Thunder
( 7% severe)

S 9

36%

65°

High 102°

4 PM

101°

102°

Partly Cloudy

S 9

26%

60°

Partly Cloudy

7 PM

99°

Partly Cloudy

0% Thunder
( 3% severe)

SSE 9

26%

58°

10 PM

87°

89°

Partly Cloudy

SSE 13

50%

66°

Thursday
20 AUG 2026

1 AM

82°

86°

Partly Cloudy

0% Thunder
( 1% severe)

SSE 9

69%

71°

Low 78°

4 AM

80°

85°

Partly Cloudy

SSE 7

82%

74°

High 104°

7 AM

78°

80°

Partly Cloudy

0% Thunder
( 2% severe)

SSE 5

88%

74°

Partly Cloudy

10 AM

85°

93°

Partly Cloudy

S 7

70%

74°

1 PM

96°

103°

Partly Cloudy

0% Thunder
( 10% severe)

S 8

43%

70°

4 PM

102°

105°

Clear

SSE 8

28%

63°

7 PM

100°

102°

Partly Cloudy

0% Thunder
( 5% severe)

SSE 8

30%

63°

10 PM

89°

94°

Clear

SSE 12

54%

70°

Friday
21 AUG 2026

1 AM

83°

89°

Clear

0% Thunder
( 1% severe)

SSE 9

72%

73°

Low 78°

4 AM

80°

85°

Partly Cloudy

SSE 6

82%

74°

High 103°

7 AM

79°

83°

Partly Cloudy

0% Thunder
( 2% severe)

SSE 1

88%

75°

Partly Cloudy

10 AM

86°

93°

Partly Cloudy

S 5

65%

73°

1 PM

97°

104°

Partly Cloudy

0% Thunder
( 12% severe)

S 5

42%

70°

4 PM

102°

105°

Partly Cloudy

SSE 6

29%

64°

7 PM

100°

102°

Partly Cloudy

SE 7

30%

63°


SAN ANTONIO/STIN, TX extended weather forecast
Saturday 22 AUG 2026	Sunday 23 AUG 2026	Monday 24 AUG 2026	Tuesday 25 AUG 2026	Wednesday 26 AUG 2026
Low 76°	Low 75°	Low 74°	Low 75°	Low 76°
High 103°	High 101°	High 103°	High 101°	High 102°

Clear 11% Rain	Clear 10% Rain	Clear 6% Rain	Clear 7% Rain	Clear 8% Rain

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SAN ANTONIO, TX 78221 Weather Forecast & Current Conditions

SAN ANTONIO/STIN, TX Current Weather

SAN ANTONIO, TX 78221 Weather Forecast

SAN ANTONIO/STIN, TX 3 hourly weather forecast

SAN ANTONIO/STIN, TX extended weather forecast

SAN ANTONIO/STIN, TX
Current Weather

SAN ANTONIO, TX 78221
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