SAN MARCOS, TX 78666 Weather Forecast & Current Conditions

Local Weather
- Local weather by ZIP or City
- Local area snow depth
- CURRENT WEATHER MAPS
- - Fronts & Pressure Centers
- - Current U.S. Temperatures
- - Northwest U.S.
- - Northeast U.S.
- - Mid-Atlantic U.S.
- - Midwest U.S.
- - Central Plains U.S.
- - Southeast U.S.
- - Southern Plains U.S.
- - Southwest U.S.
- - Alaska
10 Day Forecasts
Other Forecasts
- Snowstorm Forecast
- U.S. 6-hourly Snowfall Forecast
- 3 DAY NAM MODEL FORECASTS
- - Clouds & Precipitation
- - Temperature
- 7 DAY NWS FORECASTS
- - Weather Type
- - Precip. Probability
- - High Temperatures
- - Low Temperatures
- - Cloud Cover
- - Wind
- - Relative Humidity
- - Dewpoint
- - Snowfall
- SEASONAL FORECASTS
- - Temperature
- - Precipitation
Severe Weather
Radar
- U.S. RADAR (NWS interactive)
- U.S. RADAR (by state)
Satellite

78666 WEATHER WARNINGS (SEVERE T-STORM & TORNADO)

CURRENT WEATHER
SAN MARCOS, TX Current Weather
10:56 AM CDT AUG 8, 2025
Clear 91°F
Feels Like:	99°F
Dewpoint:	72°F
Rel. Hum.:	54%
Visibility:	10 miles
Wind:	SW at 14 mph
Pressure:	30.05 inches
Last 72 hours
Local Area Snow Depth
Texas Current Weather
Texas MOS Forecast Weather

Weather Map

(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

TODAY
Sunny. Highs in the upper 90s. South winds around 5 mph.

TONIGHT
Clear. Lows in the lower 70s. South winds 5 to 10 mph.

SATURDAY
Sunny. Highs in the upper 90s. Southeast winds 5 to 10 mph with gusts up to 20 mph.

SATURDAY NIGHT
Clear. Lows in the lower 70s. South winds 5 to 10 mph.

SUNDAY
Mostly sunny. Highs in the mid 90s. Southeast winds 5 to 10 mph.

SUNDAY NIGHT
Mostly clear. Lows in the lower 70s.

MONDAY
Mostly sunny in the morning, then partly cloudy with a slight chance of showers and thunderstorms in the afternoon. Highs in the mid 90s.

MONDAY NIGHT
Mostly clear. Lows in the lower 70s.

TUESDAY
Mostly sunny. A slight chance of showers and thunderstorms in the afternoon. Highs in the mid 90s.

TUESDAY NIGHT THROUGH THURSDAY
Mostly clear. Lows in the mid 70s. Highs in the mid 90s.

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 PM EDT 8/ 7/2025

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
8 AUG 2025

1 AM

81°

86°

Clear

0% Thunder
( 1% severe)

S 7

77%

73°

Low 73°

4 AM

77°

78°

Clear

SSW 6

90%

74°

High 100°

7 AM

74°

Clear

0% Thunder
( 1% severe)

SSW 5

97%

73°

Clear

10 AM

86°

94°

Clear

SW 6

68%

74°

1 PM

95°

101°

Clear

0% Thunder
( 12% severe)

S 7

43%

69°

4 PM

98°

103°

Clear

SSE 8

37%

67°

7 PM

96°

99°

Clear

0% Thunder
( 7% severe)

SE 9

36%

65°

10 PM

85°

90°

Clear

SE 8

61%

70°

Saturday
9 AUG 2025

1 AM

80°

84°

Clear

0% Thunder
( 2% severe)

S 8

77%

72°

Low 74°

4 AM

77°

78°

Clear

S 5

87%

73°

High 98°

7 AM

74°

Partly Cloudy

0% Thunder
( 2% severe)

SSW 2

97%

73°

Partly Cloudy

10 AM

85°

93°

Clear

S 5

70%

74°

1 PM

93°

98°

Clear

0% Thunder
( 20% severe)

SE 7

46%

69°

4 PM

96°

101°

Partly Cloudy

ESE 9

40%

68°

7 PM

92°

96°

Clear

0% Thunder
( 10% severe)

ESE 12

44%

67°

10 PM

83°

88°

Clear

SE 9

67%

71°


SAN MARCOS, TX extended weather forecast
Sunday 10 AUG 2025	Monday 11 AUG 2025	Tuesday 12 AUG 2025	Wednesday 13 AUG 2025	Thursday 14 AUG 2025
Low 74°	Low 75°	Low 73°	Low 75°	Low 74°
High 99°	High 97°	High 95°	High 99°	High 100°

Partly Cloudy 8% Rain	Partly Cloudy 21% Rain	Mostly Cloudy 44% Rain	Partly Cloudy 20% Rain	Partly Cloudy 18% Rain

SELECT BOX EXAMPLES:

for LOCAL WEATHER:
SNOW DEPTH:
LOCAL WEATHER RADAR:
STATE WEATHER MAP:

San Marcos, TX
San Marcos, TX snow
San Marcos, TX radar
TX map

-or-
-or-
-or-

78666
78666 snow
78666 radar

-or-
-or-

TX
TX snow

Put our free WeatherStreet weather lookup on your web page.

Terms & Conditions
This is not clickable - please e-mail us separately

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
Weather Forecast