San Marcos, Texas Weather Conditions

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Current Conditions

  • 79°
  • Clear
  • Wind: South 7 mph
  • Humidity: 74%
  • Visibility: 10.0 miles
  • Dew Point: 70°
  • Pressure: 30.02 in. 0

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Next 12 Hours

1  am
4  am
7  am
10  am
1  pm
Clear
Clear
Partly Cloudy
Partly Cloudy
Fog
Fog
Partly Cloudy
Partly Cloudy
Clear
Clear
79°
75°
72°
84°
91°
Forecast data from the National Digital Forecast Database.

5 Day Forecast

  • Saturday
  • Partly Cloudy
  • High: 99 °
  • Low: 72 °
  • Partly Cloudy
  • Sunday
  • Partly Cloudy
  • High: 95 °
  • Low: 72 °
  • Partly Cloudy
  • Monday
  • Partly Cloudy
  • High: 97 °
  • Low: 75 °
  • Partly Cloudy
  • Tuesday
  • Chance of a Thunderstorm
  • High: 93 °
  • Low: 73 °
  • Chance of a Thunderstorm
  • Wednesday
  • Partly Cloudy
  • High: 95 °
  • Low: 73 °
  • Partly Cloudy

Forecast for San Marcos, Texas

Updated: 10:00 PM CDT on July 25, 2014

  • Saturday

    Partly cloudy. Fog early. High of 99F. Winds from the South at 10 to 15 mph.

  • Saturday Night

    Clear in the evening, then mostly cloudy. Low of 72F. Breezy. Winds from the SSE at 10 to 20 mph.

  • Sunday

    Clear. Fog early. High of 95F. Winds from the South at 10 to 15 mph.

  • Sunday Night

    Clear in the evening, then partly cloudy. Low of 72F. Winds from the South at 5 to 15 mph.

  • Monday

    Partly cloudy in the morning, then clear. High of 97F. Winds from the South at 5 to 10 mph.

  • Monday Night

    Clear in the evening, then mostly cloudy. Low of 75F. Winds from the South at 5 to 10 mph.

  • Tuesday

    Overcast in the morning, then partly cloudy with a chance of a thunderstorm and rain. High of 93F. Winds less than 5 mph. Chance of rain 20%.

  • Tuesday Night

    Partly cloudy with a chance of a thunderstorm and rain in the evening, then overcast with a chance of a thunderstorm and rain. Low of 73F. Winds less than 5 mph. Chance of rain 50% with rainfall amounts near 0.2 in. possible.

  • Wednesday

    Overcast in the morning, then partly cloudy. High of 95F. Winds less than 5 mph.

  • Wednesday Night

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

  • Thursday

    Partly cloudy. High of 93F. Winds from the SSE at 5 to 10 mph.

  • Thursday Night

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

  • Friday

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

  • Friday Night

    Partly cloudy with a chance of a thunderstorm. Low of 72F. Winds from the ENE at 5 to 15 mph. Chance of rain 30%.

  • Saturday

    Partly cloudy with a chance of a thunderstorm. High of 90F. Winds less than 5 mph. Chance of rain 20%.

  • Saturday Night

    Partly cloudy. Low of 72F. Winds less than 5 mph.

  • Sunday

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

  • Sunday Night

    Partly cloudy. Low of 72F. Winds less than 5 mph.

  • Monday

    Partly cloudy. High of 91F. Winds less than 5 mph.

  • Monday Night

    Partly cloudy. Low of 72F. Winds less than 5 mph.

  • Tuesday

    Clear. High of 91F. Winds less than 5 mph.

  • Tuesday Night

    Clear. Low of 72F. Winds less than 5 mph.

Personal Weather Stations

Personal Weather Stations [Add your weather station!]

Location: Spring Lake Hills, San Marcos, TX

Updated: 2:07 AM CDT

Temperature: 78.6 °F Dew Point: 76 °F Humidity: 90% Wind: SSE at 3.6 mph Pressure: 30.21 in Hourly Precipitation: 0.00 in Heat Index: 82 °F Graphs

Location: Siesta Verde, San Marcos, TX

Updated: 12:00 AM CDT

Temperature: 81.5 °F Dew Point: 73 °F Humidity: 76% Wind: SE at 3.6 mph Pressure: 29.92 in Hourly Precipitation: 0.00 in Heat Index: 87 °F Graphs

Location: Lime Kiln, San Marcos, TX

Updated: 2:07 AM CDT

Temperature: 79.4 °F Dew Point: 73 °F Humidity: 82% Wind: Calm Pressure: 29.93 in Hourly Precipitation: 0.00 in Heat Index: 83 °F Graphs

Location: Hunter Ridge, San Marcos, TX

Updated: 2:07 AM CDT

Temperature: 78.5 °F Dew Point: 73 °F Humidity: 84% Wind: ENE at 1.0 mph Pressure: 29.96 in Hourly Precipitation: 0.00 in Heat Index: 81 °F Graphs

Location: Quail Run, Martindale, TX

Updated: 2:07 AM CDT

Temperature: 82.4 °F Dew Point: 75 °F Humidity: 78% Wind: SE at 2.2 mph Pressure: 29.91 in Hourly Precipitation: 0.00 in Heat Index: 89 °F Graphs

Location: Oak Meadows, San Marcos, TX

Updated: 2:07 AM CDT

Temperature: 78.3 °F Dew Point: 74 °F Humidity: 86% Wind: Calm Pressure: 29.93 in Hourly Precipitation: 0.00 in Heat Index: 81 °F Graphs

Location: Williams Ranch, San Marcos, TX

Updated: 2:03 AM CDT

Temperature: 77.9 °F Dew Point: 72 °F Humidity: 83% Wind: Calm Pressure: 29.60 in Hourly Precipitation: 0.00 in Heat Index: 80 °F Graphs

Location: Goodger Farm, Martindale, TX

Updated: 2:07 AM CDT

Temperature: 78.8 °F Dew Point: 76 °F Humidity: 90% Wind: Calm Pressure: 29.91 in Hourly Precipitation: 0.00 in Heat Index: 82 °F Graphs

Location: Silverado, Kyle, TX

Updated: 2:02 AM CDT

Temperature: 79.0 °F Dew Point: 78 °F Humidity: 98% Wind: WSW at 2.7 mph Pressure: 29.87 in Hourly Precipitation: - Heat Index: 84 °F Graphs

Location: Downtown, Staples, TX

Updated: 2:07 AM CDT

Temperature: 78.9 °F Dew Point: 74 °F Humidity: 85% Wind: Calm Pressure: 30.01 in Hourly Precipitation: 0.00 in Heat Index: 82 °F Graphs

Location: River Mountain Ranch, Wimberley, TX

Updated: 2:07 AM CDT

Temperature: 77.7 °F Dew Point: 75 °F Humidity: 90% Wind: SSE at 5.1 mph Pressure: 29.93 in Hourly Precipitation: 0.00 in Heat Index: 80 °F Graphs

Location: Havenwood, New Braunfels, TX

Updated: 2:05 AM CDT

Temperature: 79.4 °F Dew Point: 73 °F Humidity: 80% Wind: Calm Pressure: 29.77 in Hourly Precipitation: 0.00 in Heat Index: 83 °F Graphs

Location: paradise hills, Wimberley, TX

Updated: 2:07 AM CDT

Temperature: 77.2 °F Dew Point: 44 °F Humidity: 31% Wind: North at 3.8 mph Pressure: 28.64 in Hourly Precipitation: 0.00 in Heat Index: 78 °F Graphs

Location: rolling oaks, New Braunfels, TX

Updated: 2:07 AM CDT

Temperature: 78.8 °F Dew Point: 72 °F Humidity: 79% Wind: Calm Pressure: 29.67 in Hourly Precipitation: 0.00 in Heat Index: 82 °F Graphs

Location: ParkPlace4RV's, Canyon Lake, TX

Updated: 2:07 AM CDT

Temperature: 77.8 °F Dew Point: 72 °F Humidity: 82% Wind: SSE at 1.0 mph Pressure: 29.93 in Hourly Precipitation: 0.00 in Heat Index: 80 °F Graphs

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

Updated: 2:02 AM CDT

Temperature: 78.1 °F Dew Point: 72 °F Humidity: 82% Wind: ENE at 2.0 mph Pressure: 29.83 in Hourly Precipitation: 0.00 in Heat Index: 81 °F Graphs

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

Updated: 2:00 AM CDT

Temperature: 78.2 °F Dew Point: 72 °F Humidity: 80% Wind: SSE at 2.0 mph Pressure: 29.94 in Hourly Precipitation: 0.00 in Heat Index: 81 °F Graphs

Location: River Road/Lange Road, Wimberley, TX

Updated: 2:05 AM CDT

Temperature: 79.2 °F Dew Point: 78 °F Humidity: 95% Wind: Calm Pressure: 29.90 in Hourly Precipitation: - Heat Index: 84 °F Graphs

Location: River Chase, New Braunfels, TX

Updated: 1:56 AM CDT

Temperature: 78.6 °F Dew Point: 62 °F Humidity: 56% Wind: ESE at 2.7 mph Pressure: 29.79 in Hourly Precipitation: - Heat Index: 80 °F Graphs

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

Updated: 2:07 AM CDT

Temperature: 79.7 °F Dew Point: 73 °F Humidity: 80% Wind: Calm Pressure: 29.90 in Hourly Precipitation: 0.00 in Heat Index: 84 °F Graphs

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

Updated: 12:48 AM CDT

Temperature: 80 °F Dew Point: 71 °F Humidity: 75% Wind: South at 3 mph Pressure: - Hourly Precipitation: 0.00 in Heat Index: 84 °F Graphs

Location: Gruene Crossing, New Braunfels, TX

Updated: 2:06 AM CDT

Temperature: 78.8 °F Dew Point: 50 °F Humidity: 37% Wind: SE at 2.2 mph Pressure: 29.68 in Hourly Precipitation: 0.00 in Heat Index: 79 °F Graphs

Location: Preiss Heights, New Braunfels, TX

Updated: 2:07 AM CDT

Temperature: 80.2 °F Dew Point: 72 °F Humidity: 77% Wind: Calm Pressure: 29.91 in Hourly Precipitation: 0.00 in Heat Index: 84 °F Graphs

Location: Flying Horses Ranch, Buda, TX

Updated: 2:07 AM CDT

Temperature: 78.3 °F Dew Point: 73 °F Humidity: 85% Wind: SW at 2.9 mph Pressure: 30.01 in Hourly Precipitation: 0.00 in Heat Index: 81 °F Graphs

Location: Canyon Falls RV Park, Canyon Lake, TX

Updated: 2:07 AM CDT

Temperature: 79.9 °F Dew Point: 71 °F Humidity: 74% Wind: ENE at 1.3 mph Pressure: 29.91 in Hourly Precipitation: 0.00 in Heat Index: 83 °F Graphs

Location: Garlic Creek West, Buda, TX

Updated: 1:53 AM CDT

Temperature: 79.4 °F Dew Point: 74 °F Humidity: 84% Wind: Calm Pressure: 29.92 in Hourly Precipitation: - Heat Index: 83 °F Graphs

Location: Oakwood Estates, New Braunfels, TX

Updated: 2:06 AM CDT

Temperature: 79.9 °F Dew Point: 73 °F Humidity: 80% Wind: Calm Pressure: 29.95 in Hourly Precipitation: 0.00 in Heat Index: 84 °F Graphs

Location: Turnersville, Buda, TX

Updated: 2:07 AM CDT

Temperature: 78.3 °F Dew Point: 63 °F Humidity: 59% Wind: South at 4.0 mph Pressure: 29.91 in Hourly Precipitation: 0.00 in Heat Index: 80 °F Graphs

Location: Wood Creek North, Wimberley, TX

Updated: 2:04 AM CDT

Temperature: 78.8 °F Dew Point: 69 °F Humidity: 71% Wind: NNE at 3.7 mph Pressure: 29.76 in Hourly Precipitation: - Heat Index: 81 °F Graphs

Location: La Ventana, Driftwood, TX

Updated: 1:57 AM CDT

Temperature: 78.0 °F Dew Point: 73 °F Humidity: 83% Wind: SSE at 2.0 mph Pressure: 29.92 in Hourly Precipitation: 0.00 in Heat Index: 80 °F Graphs

Location: Blanco River Estates, Wimberley, TX

Updated: 2:06 AM CDT

Temperature: 79.4 °F Dew Point: 71 °F Humidity: 75% Wind: Calm Pressure: 29.96 in Hourly Precipitation: 0.00 in Heat Index: 82 °F Graphs

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

Updated: 12:20 AM CDT

Temperature: 83 °F Dew Point: - Humidity: - Wind: Calm Pressure: - Hourly Precipitation: 0.00 in Heat Index: 81 °F Graphs

Location: APRSWXNET Buda TX US, Austin, TX

Updated: 1:17 AM CDT

Temperature: 80 °F Dew Point: 72 °F Humidity: 78% Wind: Calm Pressure: 29.86 in Hourly Precipitation: 0.00 in Heat Index: 84 °F Graphs

Location: Turkey Cove, Canyon Lake, TX

Updated: 1:59 AM CDT

Temperature: 79.4 °F Dew Point: 72 °F Humidity: 79% Wind: SSE at 6.0 mph Pressure: 29.93 in Hourly Precipitation: 0.00 in Heat Index: 83 °F Graphs

Location: Lake Dunlap, New Braunfels, TX

Updated: 2:07 AM CDT

Temperature: 80.8 °F Dew Point: 74 °F Humidity: 79% Wind: Calm Pressure: 29.95 in Hourly Precipitation: 0.00 in Heat Index: 86 °F Graphs

Location: GWW Bluestem Austin, TX 78737, Austin, TX

Updated: 1:57 AM CDT

Temperature: 77.4 °F Dew Point: 73 °F Humidity: 86% Wind: SSE at 1.0 mph Pressure: 29.96 in Hourly Precipitation: 0.00 in Heat Index: 79 °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 
1138 PM CDT Friday Jul 25 2014 


Aviation... 
VFR skies prevail tonight through Saturday night. Except shallow 
moisture depth will allow for periods of stratus with MVFR/IFR 
ceilings late tonight into middle morning Saturday and late Saturday 
night along Escarpment into Hill Country. S to southeast winds 4 to 8 kts 
tonight increase to 10 to 17 kts Saturday due to daytime mixing 
and the seabreeze and then decrease to less than 10 kts Saturday 
night as the airmass decouples. 


&& 


Previous discussion... /issued 634 PM CDT Friday Jul 25 2014/ 


Aviation... 
isolated rain showers/thunderstorms and rain S of a kdrt to ksat to kgyb line will move to the 
northwest through 02z or 03z and then dissipate. Made no mention in the tafs 
due to probs less than 20. However...will monitor radar trends for 
possible updates. VFR skies prevail this evening. Stratus with 
MVFR/IFR ceilings develops overnight along the Escarpment and into The 
Hill Country. Clouds scattered out middle morning Saturday with VFR skies 
through afternoon into evening. S to southeast winds 7 to 12 kts this 
evening decrease to 7 kts or less overnight and then increase to 
10 to 15 kts on Saturday. Wind gusts up to 30 kts are possible in 
and near rain showers/thunderstorms and rain this evening. 


Previous discussion... /issued 331 PM CDT Friday Jul 25 2014/ 


Short term (tonight through Saturday night)... 
recent mesoscale model runs still show hints of convection over 
the southern Rio Grande plains this afternoon into early 
evening...but chances are low so we only kept isolated early 
evening wording in the text forecasts. Any storms that develop 
should dissipate by 02z. Otherwise...the upper level ridge builds 
east across Texas and northwest across The Rockies...so expect hot 
and dry conditions on Saturday. 


Long term (sunday through friday)... 
the upper level ridge maintains a strong influence across Texas 
through Tuesday. Height/thickness values support slightly above 
normal temperatures. The combination of heat and increasing dew 
point will produce heat index values of 100-107 for a few hours 
each afternoon across the coastal plains. We will highlight this 
in the severe weather potential statement and issue an Special Weather Statement...but in reality it/S really not much 
hotter than typical conditions for late July. 


A deep upper level trough over the Great Lakes...the ridge over 
The Rockies...and a trough along the Pacific coast will form an 
Omega blocking pattern next week. This will result in an unseasonably 
cool air mass for the eastern half of the country...including Texas. 
Medium range models have been consistent in pushing a main cold 
front and potentially minor outflow boundaries through most of 
Texas. Isentropic lift and moist air pooling along these 
boundaries (pw approaching 2.4 inches) will create an favorable 
environment for at least scattered storm coverage...and potentially 
heavy rain. Extensive cloudcover and rain may keep high 
temperatures well below normal. Due to uncertainty in specific 
placement of features...we will start the trend to increase probability of precipitation 
and quantitative precipitation forecast...and decrease high temperatures...for Thursday and Friday. 
Expect additional adjustments as model guidance and observations 
clarify expectations. 


&& 


Preliminary point temps/pops... 
Austin Camp Mabry 75 98 75 98 74 / - - - - - 
Austin Bergstrom international Airport 73 98 74 98 72 / - - - - - 
New Braunfels Muni Airport 73 97 73 97 72 / - - - - - 
Burnet Muni Airport 73 97 73 97 73 / - - - - - 
del Rio International Airport 78 100 79 100 78 / 20 - - - - 
Georgetown Muni Airport 74 97 74 98 74 / - - - - - 
Hondo Muni Airport 73 98 73 98 72 / 20 - - - - 
San Marcos Muni Airport 73 98 74 98 72 / - - - - - 
La Grange - Fayette regional 76 96 77 96 75 / - - - - - 
San Antonio International Airport 76 97 75 97 75 / - - - - - 
Stinson Muni Airport 75 98 74 98 74 / - - - - - 


&& 


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


$$ 


Mesoscale/aviation...04 
synoptic/grids...25 



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