San Marcos, Texas Weather Conditions

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Current Conditions

  • 97°
  • Scattered Clouds
  • Wind: SE 17 mph
  • Humidity: 41%
  • Visibility: 10.0 miles
  • Dew Point: 70°
  • Pressure: 29.91 in. -
  • Heat Index: 103

Nowcast

  • Now as of 3:08 PM CDT on September 2, 2014

    Through 5 PM...isolated showers and thunderstorms will move toward the north. These storms will produce infrequent lightning and light to moderate rain. Spotty rainfall totals of one tenth of an inch are expected.

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Next 12 Hours

4  pm
7  pm
10  pm
1  am
4  am
Chance of a Thunderstorm
Chance of T-storms
Chance of a Thunderstorm
Chance of T-storms
Partly Cloudy
Partly Cloudy
Partly Cloudy
Partly Cloudy
Mostly Cloudy
Mostly Cloudy
93°
90°
77°
77°
79°
Forecast data from the National Digital Forecast Database.

5 Day Forecast

  • Tuesday
  • Chance of a Thunderstorm
  • High: 99 °
  • Low: 75 °
  • Chance of a Thunderstorm
  • Wednesday
  • Chance of a Thunderstorm
  • High: 95 °
  • Low: 77 °
  • Chance of T-Storms
  • Thursday
  • Chance of a Thunderstorm
  • High: 95 °
  • Low: 73 °
  • Chance of a Thunderstorm
  • Friday
  • Chance of a Thunderstorm
  • High: 95 °
  • Low: 72 °
  • Chance of a Thunderstorm
  • Saturday
  • Partly Cloudy
  • High: 95 °
  • Low: 73 °
  • Partly Cloudy

Forecast for San Marcos, Texas

Updated: 4:00 PM CDT on September 02, 2014

  • Tuesday

    Mostly cloudy with a chance of a thunderstorm and a chance of rain. High of 99F. Winds from the SSE at 10 to 15 mph. Chance of rain 20%.

  • Tuesday Night

    Partly cloudy with a chance of a thunderstorm and a chance of rain. Low of 75F. Winds from the SSE at 5 to 20 mph.

  • Wednesday

    Overcast with a chance of a thunderstorm and a chance of rain. High of 95F. Winds from the SE at 5 to 20 mph. Chance of rain 30%.

  • Wednesday Night

    Partly cloudy. Low of 77F. Winds from the SSE at 5 to 15 mph.

  • Thursday

    Mostly cloudy with a chance of a thunderstorm and a chance of rain. High of 95F with a heat index of 100F. Winds from the SE at 5 to 15 mph. Chance of rain 20%.

  • Thursday Night

    Partly cloudy. Low of 73F. Winds from the SSE at 5 to 15 mph.

  • Friday

    Partly cloudy with a chance of a thunderstorm and rain in the afternoon. Fog early. High of 95F. Winds from the SE at 5 to 10 mph. Chance of rain 20%.

  • Friday Night

    Clear. Low of 72F. Winds from the SSE at 5 to 10 mph.

  • Saturday

    Partly cloudy. High of 95F. Winds less than 5 mph.

  • Saturday Night

    Clear with a chance of a thunderstorm. Low of 73F. Winds from the SSE at 5 to 10 mph. Chance of rain 20%.

  • Sunday

    Clear with a chance of a thunderstorm. High of 95F. Winds less than 5 mph. Chance of rain 30%.

  • Sunday Night

    Clear with a chance of a thunderstorm. Low of 73F. Winds from the SSE at 5 to 10 mph. Chance of rain 50% with rainfall amounts near 0.2 in. possible.

  • Monday

    Partly cloudy. High of 95F. Winds from the SSE at 5 to 10 mph.

  • Monday Night

    Partly cloudy. Low of 73F. Winds from the SSE at 5 to 10 mph.

  • Tuesday

    Clear. High of 95F. Winds from the South at 5 to 15 mph.

  • Tuesday Night

    Clear. Fog overnight. Low of 73F. Winds from the SSE at 5 to 15 mph.

  • Wednesday

    Partly cloudy. High of 95F. Winds from the SSE at 5 to 10 mph.

  • Wednesday Night

    Clear. Low of 73F. Winds from the SSE at 5 to 10 mph.

  • Thursday

    Partly cloudy. High of 97F. Winds less than 5 mph.

  • Thursday Night

    Clear. Low of 73F. Winds less than 5 mph.

  • Friday

    Partly cloudy with a chance of a thunderstorm. High of 95F. Winds less than 5 mph. Chance of rain 40%.

  • Friday Night

    Clear. Low of 73F. Winds less than 5 mph.

  • Saturday

    Clear. High of 93F. Winds less than 5 mph.

  • Saturday Night

    Clear. Low of 73F. Winds from the East at 5 to 10 mph.

Personal Weather Stations

Personal Weather Stations [Add your weather station!]

Location: Spring Lake Hills, San Marcos, TX

Updated: 4:15 PM CDT

Temperature: 92.8 °F Dew Point: 74 °F Humidity: 55% Wind: SSE at 1.1 mph Pressure: 30.09 in Hourly Precipitation: 0.00 in Heat Index: 103 °F Graphs

Location: Siesta Verde, San Marcos, TX

Updated: 4:15 PM CDT

Temperature: 94.6 °F Dew Point: 68 °F Humidity: 43% Wind: SSE at 6.0 mph Pressure: 29.03 in Hourly Precipitation: 0.00 in Heat Index: 100 °F Graphs

Location: Lime Kiln, San Marcos, TX

Updated: 4:15 PM CDT

Temperature: 98.6 °F Dew Point: 74 °F Humidity: 45% Wind: Calm Pressure: 29.83 in Hourly Precipitation: 0.00 in Heat Index: 110 °F Graphs

Location: Hunter Ridge, San Marcos, TX

Updated: 4:15 PM CDT

Temperature: 92.1 °F Dew Point: 72 °F Humidity: 53% Wind: East at 4.0 mph Pressure: 29.85 in Hourly Precipitation: 0.00 in Heat Index: 100 °F Graphs

Location: Oak Meadows, San Marcos, TX

Updated: 4:15 PM CDT

Temperature: 95.9 °F Dew Point: 71 °F Humidity: 45% Wind: SE at 1.8 mph Pressure: 29.84 in Hourly Precipitation: 0.00 in Heat Index: 104 °F Graphs

Location: Williams Ranch, San Marcos, TX

Updated: 4:10 PM CDT

Temperature: 94.5 °F Dew Point: 68 °F Humidity: 43% Wind: Calm Pressure: 29.49 in Hourly Precipitation: 0.00 in Heat Index: 100 °F Graphs

Location: Goodger Farm, Martindale, TX

Updated: 4:15 PM CDT

Temperature: 98.1 °F Dew Point: 71 °F Humidity: 42% Wind: Calm Pressure: 29.80 in Hourly Precipitation: 0.00 in Heat Index: 107 °F Graphs

Location: Silverado, Kyle, TX

Updated: 4:13 PM CDT

Temperature: 96.3 °F Dew Point: 43 °F Humidity: 16% Wind: NNW at 3.7 mph Pressure: 29.73 in Hourly Precipitation: - Heat Index: 92 °F Graphs

Location: River Mountain Ranch, Wimberley, TX

Updated: 4:15 PM CDT

Temperature: 97.3 °F Dew Point: 72 °F Humidity: 44% Wind: SE at 4.9 mph Pressure: 29.85 in Hourly Precipitation: 0.00 in Heat Index: 106 °F Graphs

Location: Havenwood, New Braunfels, TX

Updated: 4:14 PM CDT

Temperature: 89.4 °F Dew Point: 75 °F Humidity: 63% Wind: South at 2.0 mph Pressure: 29.66 in Hourly Precipitation: 0.00 in Heat Index: 100 °F Graphs

Location: paradise hills, Wimberley, TX

Updated: 4:15 PM CDT

Temperature: 92.8 °F Dew Point: 42 °F Humidity: 17% Wind: North at 3.4 mph Pressure: 28.56 in Hourly Precipitation: 0.00 in Heat Index: 89 °F Graphs

Location: rolling oaks, New Braunfels, TX

Updated: 4:15 PM CDT

Temperature: 87.1 °F Dew Point: 72 °F Humidity: 62% Wind: Calm Pressure: 29.57 in Hourly Precipitation: 0.00 in Heat Index: 94 °F Graphs

Location: Un Encino Rancho - Box Canyon, Wimberley, TX

Updated: 4:02 PM CDT

Temperature: 97.3 °F Dew Point: 72 °F Humidity: 44% Wind: Calm Pressure: 29.72 in Hourly Precipitation: 0.00 in Heat Index: 106 °F Graphs

Location: MesoWest GOODWN TX US UPR, New Braunfels, TX

Updated: 2:20 PM CDT

Temperature: 96 °F Dew Point: - Humidity: - Wind: Calm Pressure: - Hourly Precipitation: 0.00 in Heat Index: 91 °F Graphs

Location: Hilltop Ridge - The Summit, New Braunfels, TX

Updated: 4:12 PM CDT

Temperature: 86.8 °F Dew Point: 74 °F Humidity: 66% Wind: SW at 3.0 mph Pressure: 29.84 in Hourly Precipitation: 0.00 in Heat Index: 95 °F Graphs

Location: River Road/Lange Road, Wimberley, TX

Updated: 4:04 PM CDT

Temperature: 100.2 °F Dew Point: 98 °F Humidity: 95% Wind: SE at 1.7 mph Pressure: 29.74 in Hourly Precipitation: - Heat Index: 187 °F Graphs

Location: MesoWest LKHART TX US UPR, Lockhart, TX

Updated: 2:35 PM CDT

Temperature: 96 °F Dew Point: - Humidity: - Wind: Calm Pressure: - Hourly Precipitation: 0.00 in Heat Index: 91 °F Graphs

Location: River Chase, New Braunfels, TX

Updated: 4:09 PM CDT

Temperature: 80.2 °F Dew Point: 66 °F Humidity: 63% Wind: South at 2.2 mph Pressure: 29.69 in Hourly Precipitation: - Heat Index: 82 °F Graphs

Location: Guadalupe River at Riverside Path, Canyon Lake, TX

Updated: 4:15 PM CDT

Temperature: 91.9 °F Dew Point: 78 °F Humidity: 63% Wind: Calm Pressure: 29.80 in Hourly Precipitation: 0.00 in Heat Index: 107 °F Graphs

Location: RAWS AUSTIN WATER QD TX US, Driftwood, TX

Updated: 3:48 PM CDT

Temperature: 97 °F Dew Point: 67 °F Humidity: 38% Wind: SE at 5 mph Pressure: - Hourly Precipitation: 0.00 in Heat Index: 102 °F Graphs

Location: Gruene Crossing, New Braunfels, TX

Updated: 4:15 PM CDT

Temperature: 80.1 °F Dew Point: 66 °F Humidity: 63% Wind: SE at 2.7 mph Pressure: 29.59 in Hourly Precipitation: 0.08 in Heat Index: 82 °F Graphs

Location: Preiss Heights, New Braunfels, TX

Updated: 4:15 PM CDT

Temperature: 91.1 °F Dew Point: 77 °F Humidity: 63% Wind: Calm Pressure: 29.79 in Hourly Precipitation: 0.00 in Heat Index: 104 °F Graphs

Location: Flying Horses Ranch, Buda, TX

Updated: 4:15 PM CDT

Temperature: 94.3 °F Dew Point: 73 °F Humidity: 51% Wind: East at 10.1 mph Pressure: 29.90 in Hourly Precipitation: 0.00 in Heat Index: 104 °F Graphs

Location: Canyon Falls RV Park, Canyon Lake, TX

Updated: 4:15 PM CDT

Temperature: 90.7 °F Dew Point: 71 °F Humidity: 52% Wind: South at 3.8 mph Pressure: 29.88 in Hourly Precipitation: 0.00 in Heat Index: 97 °F Graphs

Location: Garlic Creek West, Buda, TX

Updated: 4:04 PM CDT

Temperature: 95.1 °F Dew Point: 75 °F Humidity: 53% Wind: Calm Pressure: 29.80 in Hourly Precipitation: - Heat Index: 108 °F Graphs

Location: Oakwood Estates, New Braunfels, TX

Updated: 4:15 PM CDT

Temperature: 95.1 °F Dew Point: 75 °F Humidity: 52% Wind: ESE at 1.0 mph Pressure: 29.83 in Hourly Precipitation: 0.00 in Heat Index: 107 °F Graphs

Location: LCYC, Canyon Lake, TX

Updated: 4:15 PM CDT

Temperature: 85.4 °F Dew Point: 75 °F Humidity: 72% Wind: SSE at 18.0 mph Pressure: 29.81 in Hourly Precipitation: 0.00 in Heat Index: 94 °F Graphs

Location: Turnersville, Buda, TX

Updated: 4:15 PM CDT

Temperature: 91.8 °F Dew Point: 74 °F Humidity: 56% Wind: ESE at 20.0 mph Pressure: 29.79 in Hourly Precipitation: 0.00 in Heat Index: 102 °F Graphs

Location: Blanco River Estates, Wimberley, TX

Updated: 4:15 PM CDT

Temperature: 98.3 °F Dew Point: 71 °F Humidity: 42% Wind: NNE at 1.0 mph Pressure: 29.84 in Hourly Precipitation: 0.00 in Heat Index: 107 °F Graphs

Location: MesoWest NEWBRA TX US UPR, New Braunfels, TX

Updated: 3:25 PM CDT

Temperature: 95 °F Dew Point: - Humidity: - Wind: Calm Pressure: - Hourly Precipitation: 0.00 in Heat Index: 91 °F Graphs

Location: Turkey Cove, Canyon Lake, TX

Updated: 4:00 PM CDT

Temperature: 90.7 °F Dew Point: 73 °F Humidity: 56% Wind: ESE at 18.0 mph Pressure: 29.83 in Hourly Precipitation: 0.00 in Heat Index: 99 °F Graphs

Location: Lake Dunlap, New Braunfels, TX

Updated: 4:15 PM CDT

Temperature: 91.6 °F Dew Point: 74 °F Humidity: 57% Wind: ESE at 2.0 mph Pressure: 29.82 in Hourly Precipitation: 0.00 in Heat Index: 102 °F Graphs

MSN Maps of:

Temp: Dew Point: Humidity Wind Pressure Hr Precip -

NWS Forecaster Discussion




Area forecast discussion 
National Weather Service Austin/San Antonio Texas 
326 PM CDT Tuesday Sep 2 2014 


Short term (tonight through Wednesday night)... 
Tropical Storm Dolly will make landfall in northeastern Mexico 
this evening. A southeasterly flow has allowed a deeper moist 
airmass with precipitable waters  near 2 inches to move inland across the coastal 
plains. Widely scattered and an occasional thunderstorm have 
developed along and east of I-35. These will continue to move to 
the northwest before dissipating this evening by a little after 
sunset. As Dolly moves further inland and weakens...this deeper 
moisture spreads further west across south central Texas. Expect 
showers and thunderstorms to develop early in the morning near the 
coastal plains and then spread west across the area during the day 
with dissipation most areas by sunset. Coverage will be scattered 
in the south and become much more isolated in the north closer to 
subtropical ridge. Locally heavy rainfall is possible due to precipitable waters  
near 2 inches. Have maintained low chance probability of precipitation Wednesday night 
mainly across the Rio Grande plains due to upslope flow enhancing 
lift and closer proximity to the nighttime rains associated with 
the center of the remnant low of Tropical Storm Dolly. A slight 
cooling of highs is expected across southern parts of our area on 
Wednesday due to more clouds and rain. 


&& 


Long term (thursday through tuesday)... 
Thursday into Friday...the remnant low of Dolly will dissipate. 
However...moisture levels are slow to decrease as the subtropical 
ridge becomes more dominant. Isolated to scattered are expected 
during the daytime hours...retreating to the Rio Grande plains 
Thursday night and Friday night. Saturday through Monday...the 
subtropical ridge settles over our area. Isolated showers and 
thunderstorms are possible along the seabreeze near the coastal 
plains. In addition...on Sunday...a weak surface boundary briefly 
moves into central Texas. Isolated showers and thunderstorms are 
possible across our northern counties. By Tuesday...the boundary 
dissipates and the ridge becomes more dominant ending the rain 
chances. High temperatures warm slightly under the ridge...except 
a brief dip across the far northeast on Sunday due to clouds and 
rain. Low temperatures will be near to slightly above seasonable 
levels. 


&& 


Preliminary point temps/pops... 
Austin Camp Mabry 77 98 76 98 77 / 20 20 10 10 10 
Austin Bergstrom international Airport 74 97 74 97 74 / 20 20 10 10 10 
New Braunfels Muni Airport 75 97 75 96 74 / 20 30 10 20 10 
Burnet Muni Airport 75 95 74 95 74 / 20 20 10 10 10 
del Rio International Airport 78 95 75 95 76 / 10 30 20 40 20 
Georgetown Muni Airport 76 97 76 97 75 / 20 20 10 10 10 
Hondo Muni Airport 76 96 74 96 74 / 20 30 10 30 20 
San Marcos Muni Airport 76 97 76 97 74 / 20 30 10 20 10 
La Grange - Fayette regional 76 97 76 96 76 / 20 20 10 20 10 
San Antonio International Airport 78 96 77 96 77 / 20 30 10 30 10 
Stinson Muni Airport 78 96 76 96 77 / 20 30 10 30 10 


&& 


Ewx watches/warnings/advisories... 
none. 
&& 


$$ 


Mesoscale/aviation...05 
synoptic/grids...04 
public service/data collection...12 










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