San Marcos, Texas Weather Conditions

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Current Conditions

  • 91°
  • Scattered Clouds
  • Wind: ENE 10 mph
  • Humidity: 41%
  • Visibility: 10.0 miles
  • Dew Point: 64°
  • Pressure: 29.99 in. 0
  • Heat Index: 93

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Next 12 Hours

4  pm
7  pm
10  pm
1  am
4  am
Partly Cloudy
Partly Cloudy
Clear
Clear
Clear
Clear
Clear
Clear
Clear
Clear
90°
82°
77°
73°
70°
Forecast data from the National Digital Forecast Database.

5 Day Forecast

  • Sunday
  • Partly Cloudy
  • High: 91 °
  • Low: 70 °
  • Partly Cloudy
  • Monday
  • Chance of a Thunderstorm
  • High: 90 °
  • Low: 70 °
  • Chance of a Thunderstorm
  • Tuesday
  • Partly Cloudy
  • High: 86 °
  • Low: 61 °
  • Partly Cloudy
  • Wednesday
  • Partly Cloudy
  • High: 88 °
  • Low: 59 °
  • Partly Cloudy
  • Thursday
  • Partly Cloudy
  • High: 84 °
  • Low: 64 °
  • Partly Cloudy

Forecast for San Marcos, Texas

Updated: 4:00 PM CDT on September 21, 2014

  • Sunday

    Overcast in the morning, then partly cloudy. High of 90F. Winds from the ENE at 5 to 10 mph.

  • Sunday Night

    Clear. Low of 70F. Winds less than 5 mph.

  • Monday

    Clear in the morning, then partly cloudy with a chance of a thunderstorm and a chance of rain. High of 90F. Winds from the NNE at 10 to 15 mph. Chance of rain 20%.

  • Monday Night

    Partly cloudy with a chance of a thunderstorm and a chance of rain. Low of 70F. Winds from the NE at 5 to 10 mph. Chance of rain 20%.

  • Tuesday

    Partly cloudy. High of 86F. Winds from the ENE at 5 to 10 mph.

  • Tuesday Night

    Mostly cloudy. Low of 61F. Winds from the East at 5 to 10 mph.

  • Wednesday

    Clear in the morning, then partly cloudy. High of 88F. Winds from the ENE at 5 to 10 mph.

  • Wednesday Night

    Clear in the evening, then partly cloudy. Low of 59F. Winds less than 5 mph.

  • Thursday

    Overcast in the morning, then partly cloudy. High of 84F. Winds from the NE at 5 to 10 mph.

  • Thursday Night

    Partly cloudy. Fog overnight. Low of 64F. Winds less than 5 mph.

  • Friday

    Partly cloudy. High of 86F. Winds from the ENE at 5 to 10 mph.

  • Friday Night

    Clear. Low of 64F. Winds less than 5 mph.

  • Saturday

    Partly cloudy. High of 88F. Winds from the NE at 5 to 10 mph.

  • Saturday Night

    Partly cloudy. Low of 68F. Winds less than 5 mph.

  • Sunday

    Partly cloudy. High of 90F. Winds less than 5 mph.

  • Sunday Night

    Partly cloudy. Low of 72F. Winds from the ESE at 5 to 10 mph shifting to the South after midnight.

  • Monday

    Partly cloudy. High of 86F. Winds less than 5 mph.

  • Monday Night

    Partly cloudy. Fog overnight. Low of 68F. Winds less than 5 mph.

  • Tuesday

    Mostly cloudy with a chance of a thunderstorm. High of 86F. Winds less than 5 mph. Chance of rain 40%.

  • Tuesday Night

    Overcast with a chance of rain. Fog overnight. Low of 66F. Winds less than 5 mph. Chance of rain 50%.

  • Wednesday

    Mostly cloudy. High of 88F. Winds less than 5 mph.

  • Wednesday Night

    Partly cloudy. Fog overnight. Low of 66F. Winds less than 5 mph.

  • Thursday

    Clear. High of 86F. Winds less than 5 mph.

  • Thursday Night

    Clear. Low of 66F. Winds from the ESE at 5 to 10 mph.

Personal Weather Stations

Personal Weather Stations [Add your weather station!]

Location: Spring Lake Hills, San Marcos, TX

Updated: 5:06 PM CDT

Temperature: 91.9 °F Dew Point: 72 °F Humidity: 52% Wind: Calm Pressure: 30.18 in Hourly Precipitation: 0.00 in Heat Index: 99 °F Graphs

Location: Lime Kiln, San Marcos, TX

Updated: 5:06 PM CDT

Temperature: 88.6 °F Dew Point: 69 °F Humidity: 52% Wind: ESE at 5.0 mph Pressure: 29.93 in Hourly Precipitation: 0.00 in Heat Index: 93 °F Graphs

Location: Hunter Ridge, San Marcos, TX

Updated: 5:06 PM CDT

Temperature: 88.9 °F Dew Point: 70 °F Humidity: 53% Wind: ESE at 1.0 mph Pressure: 29.94 in Hourly Precipitation: 0.00 in Heat Index: 94 °F Graphs

Location: Oak Meadows, San Marcos, TX

Updated: 5:06 PM CDT

Temperature: 87.8 °F Dew Point: 68 °F Humidity: 52% Wind: Calm Pressure: 29.93 in Hourly Precipitation: 0.00 in Heat Index: 91 °F Graphs

Location: Silverado, Kyle, TX

Updated: 5:04 PM CDT

Temperature: 88.9 °F Dew Point: 43 °F Humidity: 20% Wind: ENE at 3.2 mph Pressure: 29.83 in Hourly Precipitation: - Heat Index: 85 °F Graphs

Location: Downtown, Staples, TX

Updated: 5:06 PM CDT

Temperature: 90.5 °F Dew Point: 68 °F Humidity: 47% Wind: SE at 6.4 mph Pressure: 29.98 in Hourly Precipitation: 0.00 in Heat Index: 94 °F Graphs

Location: River Mountain Ranch, Wimberley, TX

Updated: 5:06 PM CDT

Temperature: 88.3 °F Dew Point: 66 °F Humidity: 47% Wind: NNW at 2.9 mph Pressure: 29.94 in Hourly Precipitation: 0.00 in Heat Index: 90 °F Graphs

Location: Havenwood, New Braunfels, TX

Updated: 5:04 PM CDT

Temperature: 88.3 °F Dew Point: 68 °F Humidity: 52% Wind: NE at 4.0 mph Pressure: 29.75 in Hourly Precipitation: 0.00 in Heat Index: 92 °F Graphs

Location: paradise hills, Wimberley, TX

Updated: 5:06 PM CDT

Temperature: 86.5 °F Dew Point: 39 °F Humidity: 19% Wind: North at 13.6 mph Pressure: 28.64 in Hourly Precipitation: 0.00 in Heat Index: 83 °F Graphs

Location: rolling oaks, New Braunfels, TX

Updated: 5:06 PM CDT

Temperature: 92.7 °F Dew Point: 66 °F Humidity: 42% Wind: ESE at 2.0 mph Pressure: 29.65 in Hourly Precipitation: 0.00 in Heat Index: 96 °F Graphs

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

Updated: 5:02 PM CDT

Temperature: 86.4 °F Dew Point: 69 °F Humidity: 56% Wind: Calm Pressure: 29.83 in Hourly Precipitation: 0.00 in Heat Index: 90 °F Graphs

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

Updated: 3:50 PM CDT

Temperature: 87 °F Dew Point: - Humidity: - Wind: Calm Pressure: - Hourly Precipitation: 0.00 in Heat Index: 84 °F Graphs

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

Updated: 4:56 PM CDT

Temperature: 89.1 °F Dew Point: 69 °F Humidity: 51% Wind: NNE at 4.0 mph Pressure: 29.93 in Hourly Precipitation: 0.00 in Heat Index: 93 °F Graphs

Location: River Road/Lange Road, Wimberley, TX

Updated: 4:54 PM CDT

Temperature: 92.8 °F Dew Point: 91 °F Humidity: 95% Wind: SE at 4.7 mph Pressure: 29.81 in Hourly Precipitation: - Heat Index: 141 °F Graphs

Location: River Chase, New Braunfels, TX

Updated: 5:04 PM CDT

Temperature: 94.1 °F Dew Point: 86 °F Humidity: 78% Wind: NE at 2.2 mph Pressure: 29.76 in Hourly Precipitation: - Heat Index: 128 °F Graphs

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

Updated: 5:06 PM CDT

Temperature: 88.5 °F Dew Point: 68 °F Humidity: 50% Wind: SE at 2.9 mph Pressure: 29.87 in Hourly Precipitation: 0.00 in Heat Index: 92 °F Graphs

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

Updated: 3:48 PM CDT

Temperature: 91 °F Dew Point: 69 °F Humidity: 49% Wind: ENE at 3 mph Pressure: - Hourly Precipitation: 0.00 in Heat Index: 96 °F Graphs

Location: Preiss Heights, New Braunfels, TX

Updated: 5:06 PM CDT

Temperature: 87.6 °F Dew Point: 70 °F Humidity: 56% Wind: Calm Pressure: 29.89 in Hourly Precipitation: 0.00 in Heat Index: 93 °F Graphs

Location: Flying Horses Ranch, Buda, TX

Updated: 5:06 PM CDT

Temperature: 88.3 °F Dew Point: 68 °F Humidity: 51% Wind: ENE at 10.1 mph Pressure: 29.99 in Hourly Precipitation: 0.00 in Heat Index: 92 °F Graphs

Location: Canyon Falls RV Park, Canyon Lake, TX

Updated: 5:06 PM CDT

Temperature: 87.1 °F Dew Point: 66 °F Humidity: 50% Wind: Calm Pressure: 29.94 in Hourly Precipitation: 0.00 in Heat Index: 90 °F Graphs

Location: Garlic Creek West, Buda, TX

Updated: 5:00 PM CDT

Temperature: 91.0 °F Dew Point: 70 °F Humidity: 51% Wind: Calm Pressure: 29.91 in Hourly Precipitation: - Heat Index: 97 °F Graphs

Location: Garlic Creek, Buda, TX

Updated: 4:56 PM CDT

Temperature: 91.2 °F Dew Point: 69 °F Humidity: 49% Wind: North at 3.2 mph Pressure: 29.93 in Hourly Precipitation: - Heat Index: 96 °F Graphs

Location: Oakwood Estates, New Braunfels, TX

Updated: 5:06 PM CDT

Temperature: 88.9 °F Dew Point: 70 °F Humidity: 54% Wind: NNE at 3.0 mph Pressure: 29.93 in Hourly Precipitation: 0.00 in Heat Index: 94 °F Graphs

Location: LCYC, Canyon Lake, TX

Updated: 5:05 PM CDT

Temperature: 87.0 °F Dew Point: 68 °F Humidity: 53% Wind: East at 11.0 mph Pressure: 29.92 in Hourly Precipitation: 0.00 in Heat Index: 90 °F Graphs

Location: Turnersville, Buda, TX

Updated: 5:06 PM CDT

Temperature: 87.1 °F Dew Point: 68 °F Humidity: 54% Wind: East at 8.0 mph Pressure: 29.90 in Hourly Precipitation: 0.00 in Heat Index: 91 °F Graphs

Location: La Ventana, Driftwood, TX

Updated: 4:52 PM CDT

Temperature: 90.3 °F Dew Point: 71 °F Humidity: 54% Wind: Calm Pressure: 29.92 in Hourly Precipitation: 0.00 in Heat Index: 97 °F Graphs

Location: Blanco River Estates, Wimberley, TX

Updated: 5:06 PM CDT

Temperature: 89.1 °F Dew Point: 69 °F Humidity: 51% Wind: ENE at 1.0 mph Pressure: 29.95 in Hourly Precipitation: 0.00 in Heat Index: 93 °F Graphs

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

Updated: 3:50 PM CDT

Temperature: 90 °F Dew Point: - Humidity: - Wind: Calm Pressure: - Hourly Precipitation: 0.00 in Heat Index: 87 °F Graphs

Location: Turkey Cove, Canyon Lake, TX

Updated: 4:57 PM CDT

Temperature: 87.3 °F Dew Point: 70 °F Humidity: 57% Wind: ESE at 3.0 mph Pressure: 29.93 in Hourly Precipitation: 0.00 in Heat Index: 92 °F Graphs

Location: Lake Dunlap, New Braunfels, TX

Updated: 5:06 PM CDT

Temperature: 86.9 °F Dew Point: 72 °F Humidity: 61% Wind: Calm Pressure: 29.92 in Hourly Precipitation: 0.00 in Heat Index: 93 °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 
321 PM CDT sun Sep 21 2014 


Short term (tonight through Monday night)... 
the County Warning Area is currently split in half with regards to the airmasses. 
The eastern half of the area has precipitable waters  down to 1.5 inches according 
to the GOES sounder. No showers or thunderstorms are expected 
across this area with partly cloudy skies persisting. The western 
half of the County Warning Area still remains moist with precipitable water values remaining near 
2 inches. Isolated to scattered showers remains predominant but 
cant rule out a thunderstorm this afternoon. Much of this activity 
should end around sunset with the loss of daytime heating. Will 
carry low probability of precipitation in the 00-03z time frame to account for any 
lingering activity. 


The latest 19z surface analysis and satellite imagery show a cold 
front in southern Oklahoma. This front is associated with a strong upper 
level low entering the Great Lakes region. This front is expected 
to continue pushing south...and will enter the northern zones late 
tonight and early Monday morning. Light showers or thunderstorms 
will be possible tomorrow afternoon behind the frontal boundary. 
High-res guidance is depicting weak activity mainly across the 
central portions of the County Warning Area. Will continue to Show Low probability of precipitation for 
much of the County Warning Area. Rainfall totals are expected to remain light with 
precipitable water values between 1.5 and 1.7 inches across the area. 


&& 


Long term (tuesday through sunday)... 
although the cold front will not bring much rain to the area...it 
will lower temperatures and bring drier dewpoints to the region. 
By Tuesday afternoon...dewpoints will drop into the upper 50s and 
lower 60s. This will allow low temperatures Tuesday through 
Thursday to fall into the lower to upper 60s. Highs during this 
time frame will only reach lower to upper 80s. These values will 
be right at or just below seasonal normals for this time of the 
year. East/southeast winds will return to the area Friday which 
could slightly increase the moisture across the southern and 
western counties. Models have been inconsistent with the placement 
of a weak upper low...cutoff from the main flow somewhere over 
Texas or the northern Gulf of Mexico. Will keep the low probability of precipitation 
continuing on Friday until more confidence can be had whether or 
not to begin raising the probability of precipitation or pulling them all together. 


Hampshire 


&& 


Preliminary point temps/pops... 
Austin Camp Mabry 71 90 66 86 65 / 10 20 10 10 - 
Austin Bergstrom international Airport 69 90 66 86 63 / - 20 10 10 - 
New Braunfels Muni Airport 69 92 68 89 65 / 10 20 10 10 10 
Burnet Muni Airport 69 88 64 86 64 / - 20 10 10 - 
del Rio International Airport 72 89 70 88 68 / 20 20 10 10 10 
Georgetown Muni Airport 70 89 65 86 62 / 10 20 10 10 - 
Hondo Muni Airport 69 93 68 92 67 / 20 20 10 10 10 
San Marcos Muni Airport 69 89 67 86 64 / 10 20 10 10 10 
La Grange - Fayette regional 72 90 67 85 65 / 10 20 10 10 10 
San Antonio International Airport 72 92 70 90 68 / - 20 10 10 10 
Stinson Muni Airport 72 93 70 90 68 / - 20 10 10 10 


&& 


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


$$ 


Mesoscale/aviation...12 
synoptic/grids...29 
public service/data collection...30 



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