SAN MARCOS, TX 78666 Weather Forecast & Current Conditions

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78666 WEATHER WARNINGS (SEVERE T-STORM & TORNADO)

CURRENT WEATHER
SAN MARCOS, TX Current Weather
1:56 PM CDT JUL 18, 2025
Clear 91°F
Feels Like:	100°F
Dewpoint:	73°F
Rel. Hum.:	56%
Visibility:	10 miles
Wind:	S at 13 mph
Pressure:	30.08 inches
Last 72 hours
Local Area Snow Depth
Texas Current Weather
Texas MOS Forecast Weather

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(Automated weather data from NWS/FAA)

78666 WEATHER FORECAST
10-Day model forecast maps 2025 Hurricanes	SAN MARCOS, TX 78666 Weather Forecast	Snowfall Forecast pages Snow Depth pages

TONIGHT
Partly cloudy. Lows in the mid 70s. South winds 5 to 10 mph.

SATURDAY
Mostly cloudy in the morning, then becoming partly cloudy. Highs in the mid 90s. South winds 5 to 10 mph with gusts up to 20 mph.

SATURDAY NIGHT
Partly cloudy. Lows in the mid 70s. South winds 5 to 10 mph with gusts up to 25 mph.

SUNDAY
Partly cloudy. Highs in the mid 90s. South winds 10 to 15 mph with gusts up to 25 mph.

SUNDAY NIGHT
Partly cloudy in the evening, then becoming mostly cloudy. Lows in the mid 70s. South winds 10 to 15 mph with gusts up to 25 mph.

MONDAY THROUGH WEDNESDAY
Partly cloudy. Highs in the mid 90s. Lows in the mid 70s.

WEDNESDAY NIGHT
Mostly clear in the evening, then becoming partly cloudy. Lows in the lower 70s.

THURSDAY THROUGH FRIDAY
Partly cloudy. Highs in the mid 90s. Lows in the mid 70s.

78666 WEATHER SATELLITE LOOPS

Visible Weather Satellite
SAN MARCOS, TX 78666

Infrared Weather Satellite
SAN MARCOS, TX 78666

78666 WEATHER RADAR LOOP

NEXRAD Weather Radar
SAN MARCOS, TX 78666

MOS COMPUTER WEATHER FORECAST

SAN MARCOS, TX 3 hourly weather forecast

weather forecast created 8:00 AM EDT 7/18/2025

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)

Friday
18 JUL 2025

1 PM

90°

96°

Mostly Cloudy

0% Thunder
( 7% severe)

S 7

54%

71°

High 94°

4 PM

93°

99°

Partly Cloudy

S 8

47%

70°

Mostly Cloudy

7 PM

91°

98°

Mostly Cloudy

0% Thunder
( 4% severe)

SSE 9

52%

71°

10 PM

83°

89°

Partly Cloudy

SSE 9

72%

73°

Saturday
19 JUL 2025

1 AM

78°

81°

Partly Cloudy

0% Thunder
( 1% severe)

S 9

91%

75°

Low 74°

4 AM

77°

78°

Mostly Cloudy

S 7

94%

75°

High 96°

7 AM

76°

75°

Mostly Cloudy

0% Thunder
( 2% severe)

S 7

97%

75°

Mostly Cloudy

10 AM

83°

91°

Mostly Cloudy

S 9

80%

76°

1 PM

91°

99°

Partly Cloudy

0% Thunder
( 12% severe)

S 12

54%

72°

4 PM

94°

101°

Partly Cloudy

S 10

47%

71°

7 PM

92°

99°

Partly Cloudy

0% Thunder
( 8% severe)

SSE 13

51%

71°

10 PM

83°

89°

Partly Cloudy

SSE 13

72%

73°

Sunday
20 JUL 2025

1 AM

79°

83°

Partly Cloudy

0% Thunder
( 2% severe)

S 12

88%

75°

Low 75°

4 AM

77°

78°

Mostly Cloudy

S 9

97%

76°

High 96°

7 AM

76°

75°

Mostly Cloudy

0% Thunder
( 4% severe)

S 7

97%

75°

Mostly Cloudy

10 AM

84°

94°

Mostly Cloudy

S 12

80%

77°

1 PM

91°

100°

Partly Cloudy

0% Thunder
( 14% severe)

S 14

56%

73°

4 PM

93°

100°

Partly Cloudy

SSE 14

49%

71°

7 PM

90°

96°

Partly Cloudy

SSE 15

54%

71°


SAN MARCOS, TX extended weather forecast
Monday 21 JUL 2025	Tuesday 22 JUL 2025	Wednesday 23 JUL 2025	Thursday 24 JUL 2025	Friday 25 JUL 2025
Low 75°	Low 74°	Low 74°	Low 72°	Low 74°
High 98°	High 97°	High 99°	High 99°	High 99°

Partly Cloudy 7% Rain	Partly Cloudy 11% Rain	Partly Cloudy 12% Rain	Partly Cloudy 17% Rain	Partly Cloudy 19% Rain

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SAN MARCOS, TX 78666 Weather Forecast & Current Conditions

SAN MARCOS, TX Current Weather

SAN MARCOS, TX 78666 Weather Forecast

SAN MARCOS, TX 3 hourly weather forecast

SAN MARCOS, TX extended weather forecast

SAN MARCOS, TX
Current Weather

SAN MARCOS, TX 78666
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