San Marcos, Texas Weather Conditions

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Current Conditions

  • 84°
  • Mostly Cloudy
  • Wind: SE 20 mph
  • Humidity: 51%
  • Visibility: 10.0 miles
  • Dew Point: 64°
  • Pressure: 29.88 in. -
  • Heat Index: 86

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Next 12 Hours

1  pm
4  pm
7  pm
10  pm
1  am
Partly Cloudy
Partly Cloudy
Partly Cloudy
Partly Cloudy
Clear
Clear
Partly Cloudy
Partly Cloudy
Chance of a Thunderstorm
Chance of T-storms
82°
88°
82°
70°
66°
Forecast data from the National Digital Forecast Database.

5 Day Forecast

  • Wednesday
  • Partly Cloudy
  • High: 88 °
  • Low: 61 °
  • Partly Cloudy
  • Thursday
  • Chance of Rain
  • High: 86 °
  • Low: 61 °
  • Chance of Rain
  • Friday
  • Partly Cloudy
  • High: 88 °
  • Low: 66 °
  • Partly Cloudy
  • Saturday
  • Partly Cloudy
  • High: 93 °
  • Low: 66 °
  • Partly Cloudy
  • Sunday
  • Chance of a Thunderstorm
  • High: 88 °
  • Low: 64 °
  • Chance of T-Storms

Forecast for San Marcos, Texas

Updated: 10:00 AM CDT on April 23, 2014

  • Wednesday

    Partly cloudy. High of 88F. Winds from the SSE at 5 to 15 mph.

  • Wednesday Night

    Partly cloudy in the evening, then overcast with a chance of a thunderstorm and a chance of rain. Low of 61F. Breezy. Winds from the SSE at 10 to 20 mph. Chance of rain 20%.

  • Thursday

    Partly cloudy with a chance of rain. High of 86F. Winds from the South at 5 to 15 mph. Chance of rain 20%.

  • Thursday Night

    Partly cloudy. Low of 61F. Winds less than 5 mph.

  • Friday

    Partly cloudy. Fog early. High of 88F. Winds from the ESE at 5 to 10 mph.

  • Friday Night

    Partly cloudy in the evening, then overcast. Fog overnight. Low of 66F. Winds from the SSE at 5 to 15 mph.

  • Saturday

    Overcast. Fog early. High of 93F with a heat index of 99F. Winds from the SSE at 5 to 15 mph.

  • Saturday Night

    Partly cloudy. Low of 66F. Breezy. Winds from the SSE at 10 to 20 mph.

  • Sunday

    Overcast with a chance of a thunderstorm and rain. High of 88F. Winds from the South at 5 to 10 mph. Chance of rain 50%.

  • Sunday Night

    Partly cloudy with a chance of a thunderstorm. Fog overnight. Low of 64F. Winds from the South at 5 to 10 mph. Chance of rain 40%.

  • Monday

    Clear. High of 90F. Winds from the West at 5 to 10 mph.

  • Monday Night

    Clear. Low of 59F. Winds from the North at 5 to 10 mph.

  • Tuesday

    Clear. High of 88F. Winds from the North at 10 to 15 mph.

  • Tuesday Night

    Clear. Low of 55F. Winds from the NW at 5 to 10 mph.

  • Wednesday

    Clear. High of 81F. Breezy. Winds from the NW at 15 to 20 mph.

  • Wednesday Night

    Clear. Low of 54F. Winds from the NNW at 5 to 15 mph.

  • Thursday

    Clear. High of 77F. Winds from the North at 5 to 10 mph.

  • Thursday Night

    Clear. Low of 52F. Winds less than 5 mph.

  • Friday

    Partly cloudy. High of 79F. Winds less than 5 mph.

  • Friday Night

    Partly cloudy. Low of 55F. Winds less than 5 mph.

  • Saturday

    Partly cloudy. High of 81F. Winds from the South at 5 to 10 mph.

  • Saturday Night

    Clear. Low of 55F. Winds from the South at 5 to 10 mph.

Personal Weather Stations

Personal Weather Stations [Add your weather station!]

Location: Spring Lake Hills, San Marcos, TX

Updated: 2:29 PM CDT

Temperature: 84.4 °F Dew Point: 72 °F Humidity: 66% Wind: Calm Pressure: 30.06 in Hourly Precipitation: 0.00 in Heat Index: 90 °F Graphs

Location: Lime Kiln, San Marcos, TX

Updated: 2:29 PM CDT

Temperature: 87.6 °F Dew Point: 67 °F Humidity: 51% Wind: South at 6.0 mph Pressure: 29.81 in Hourly Precipitation: 0.00 in Heat Index: 91 °F Graphs

Location: Hunter Ridge, San Marcos, TX

Updated: 2:29 PM CDT

Temperature: 86.2 °F Dew Point: 69 °F Humidity: 56% Wind: ESE at 4.0 mph Pressure: 29.84 in Hourly Precipitation: 0.00 in Heat Index: 90 °F Graphs

Location: Quail Run, Martindale, TX

Updated: 2:29 PM CDT

Temperature: 82.8 °F Dew Point: 66 °F Humidity: 56% Wind: Calm Pressure: 29.76 in Hourly Precipitation: 0.00 in Heat Index: 85 °F Graphs

Location: Williams Ranch, San Marcos, TX

Updated: 2:26 PM CDT

Temperature: 85.6 °F Dew Point: 64 °F Humidity: 48% Wind: South at 9.2 mph Pressure: 29.45 in Hourly Precipitation: 0.00 in Heat Index: 87 °F Graphs

Location: Downtown, Staples, TX

Updated: 2:29 PM CDT

Temperature: 83.7 °F Dew Point: 68 °F Humidity: 58% Wind: SW at 6.7 mph Pressure: 29.84 in Hourly Precipitation: 0.00 in Heat Index: 87 °F Graphs

Location: paradise hills, Wimberley, TX

Updated: 2:29 PM CDT

Temperature: 82.7 °F Dew Point: 32 °F Humidity: 16% Wind: South at 3.4 mph Pressure: 29.91 in Hourly Precipitation: 0.00 in Heat Index: 80 °F Graphs

Location: rolling oaks, New Braunfels, TX

Updated: 2:29 PM CDT

Temperature: 86.5 °F Dew Point: 66 °F Humidity: 51% Wind: Calm Pressure: 29.52 in Hourly Precipitation: 0.00 in Heat Index: 89 °F Graphs

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

Updated: 1:35 PM CDT

Temperature: 82 °F Dew Point: - Humidity: - Wind: Calm Pressure: - Hourly Precipitation: 0.00 in Heat Index: 80 °F Graphs

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

Updated: 2:21 PM CDT

Temperature: 82.5 °F Dew Point: 66 °F Humidity: 57% Wind: SE at 7.0 mph Pressure: 29.81 in Hourly Precipitation: 0.00 in Heat Index: 85 °F Graphs

Location: River Road/Lange Road, Wimberley, TX

Updated: 2:26 PM CDT

Temperature: 90.3 °F Dew Point: 82 °F Humidity: 77% Wind: SSE at 8.3 mph Pressure: 29.70 in Hourly Precipitation: - Heat Index: 112 °F Graphs

Location: MesoWest LKHART TX US UPR, Lockhart, TX

Updated: 12:55 PM CDT

Temperature: 82 °F Dew Point: - Humidity: - Wind: Calm Pressure: - Hourly Precipitation: 0.00 in Heat Index: 80 °F Graphs

Location: River Chase, New Braunfels, TX

Updated: 2:25 PM CDT

Temperature: 88.5 °F Dew Point: 78 °F Humidity: 71% Wind: North at 4.3 mph Pressure: 29.64 in Hourly Precipitation: - Heat Index: 102 °F Graphs

Location: Gruene Crossing, New Braunfels, TX

Updated: 2:29 PM CDT

Temperature: 87.6 °F Dew Point: 27 °F Humidity: 11% Wind: ESE at 6.3 mph Pressure: 29.53 in Hourly Precipitation: 0.00 in Heat Index: 84 °F Graphs

Location: Preiss Heights, New Braunfels, TX

Updated: 2:29 PM CDT

Temperature: 88.1 °F Dew Point: 68 °F Humidity: 52% Wind: Calm Pressure: 29.78 in Hourly Precipitation: 0.00 in Heat Index: 92 °F Graphs

Location: Flying Horses Ranch, Buda, TX

Updated: 2:29 PM CDT

Temperature: 83.5 °F Dew Point: 66 °F Humidity: 56% Wind: SE at 11.0 mph Pressure: 29.86 in Hourly Precipitation: 0.00 in Heat Index: 86 °F Graphs

Location: Canyon Falls RV Park, Canyon Lake, TX

Updated: 2:29 PM CDT

Temperature: 85.8 °F Dew Point: 63 °F Humidity: 46% Wind: Calm Pressure: 29.82 in Hourly Precipitation: 0.00 in Heat Index: 87 °F Graphs

Location: Garlic Creek West, Buda, TX

Updated: 2:24 PM CDT

Temperature: 84.8 °F Dew Point: 68 °F Humidity: 58% Wind: SSW at 7.0 mph Pressure: 29.79 in Hourly Precipitation: - Heat Index: 88 °F Graphs

Location: Oakwood Estates, New Braunfels, TX

Updated: 2:29 PM CDT

Temperature: 84.3 °F Dew Point: 69 °F Humidity: 60% Wind: SE at 4.0 mph Pressure: 29.82 in Hourly Precipitation: 0.00 in Heat Index: 88 °F Graphs

Location: LCYC, Canyon Lake, TX

Updated: 2:29 PM CDT

Temperature: 77.7 °F Dew Point: 65 °F Humidity: 65% Wind: South at 12.0 mph Pressure: 29.80 in Hourly Precipitation: 0.00 in Heat Index: 80 °F Graphs

Location: Turnersville, Buda, TX

Updated: 2:29 PM CDT

Temperature: 81.4 °F Dew Point: 63 °F Humidity: 54% Wind: SE at 20.0 mph Pressure: 29.78 in Hourly Precipitation: 0.00 in Heat Index: 83 °F Graphs

Location: Wood Creek North, Wimberley, TX

Updated: 2:25 PM CDT

Temperature: 86.4 °F Dew Point: 64 °F Humidity: 48% Wind: NW at 9.9 mph Pressure: 29.62 in Hourly Precipitation: - Heat Index: 88 °F Graphs

Location: La Ventana, Driftwood, TX

Updated: 2:24 PM CDT

Temperature: 83.7 °F Dew Point: 66 °F Humidity: 55% Wind: SE at 6.0 mph Pressure: 29.78 in Hourly Precipitation: 0.00 in Heat Index: 86 °F Graphs

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

Updated: 1:40 PM CDT

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

Location: Turkey Cove, Canyon Lake, TX

Updated: 2:20 PM CDT

Temperature: 82.1 °F Dew Point: 67 °F Humidity: 60% Wind: ESE at 13.0 mph Pressure: 29.81 in Hourly Precipitation: 0.00 in Heat Index: 85 °F Graphs

Location: Lake Dunlap, New Braunfels, TX

Updated: 2:29 PM CDT

Temperature: 82.7 °F Dew Point: 68 °F Humidity: 61% Wind: East at 6.0 mph Pressure: 29.81 in Hourly Precipitation: 0.00 in Heat Index: 86 °F Graphs

Location: Goldenwood West, Austin, TX

Updated: 2:29 PM CDT

Temperature: 83.9 °F Dew Point: 64 °F Humidity: 51% Wind: SE at 7.2 mph Pressure: 29.85 in Hourly Precipitation: 0.00 in Heat Index: 85 °F Graphs

Location: Big Dog at Ledgerock, Wimberley, TX

Updated: 2:15 PM CDT

Temperature: 84.2 °F Dew Point: 64 °F Humidity: 51% Wind: South at 7.0 mph Pressure: 29.77 in Hourly Precipitation: 0.00 in Heat Index: 86 °F Graphs

Location: Stallion Springs, Fischer, TX

Updated: 2:25 PM CDT

Temperature: 87.1 °F Dew Point: 66 °F Humidity: 50% Wind: NE at 2.2 mph Pressure: 29.63 in Hourly Precipitation: - Heat Index: 90 °F Graphs

Location: County Line Road Area, New Braunfels, TX

Updated: 2:29 PM CDT

Temperature: 82.5 °F Dew Point: 67 °F Humidity: 60% Wind: East at 16.1 mph Pressure: 29.84 in Hourly Precipitation: 0.00 in Heat Index: 85 °F Graphs

MSN Maps of:

Temp: Dew Point: Humidity Wind Pressure Hr Precip -

NWS Forecaster Discussion




Area forecast discussion...updated 
National Weather Service Austin/San Antonio Texas 
1230 PM CDT Wednesday Apr 23 2014 


Aviation... 
an upper level disturbance passing to the north could trigger a 
few rain showers/thunderstorms and rain late this afternoon across the Rio Grande and a few 
of these may hold together and move east overnight and into the 
early morning hours of Thursday. VFR conditions will continue this 
afternoon and into the evening. Satellite imagery indicated cumulus 
field starting to form across The Hill Country and this will 
continue through the afternoon. Moist southerly flow is increasing 
the cumulus field over the coastal plains and some of this cumulus will work 
into the region from the south. After 06s low clouds will develop 
and MVFR/IFR ceilings are expected through 18z-19z. S/southeast winds 
10-20 knots will prevail through 02z then wind speeds drop off to near 
10 knots. Have included a mention of thunderstorms and rain in the kdrt forecast but 
left out of the other terminals due to timing issues. 


&& 


Previous discussion... /issued 1041 am CDT Wednesday Apr 23 2014/ 


Update... 
have let the dense fog advisory expire as fog has dissipated with 
mixing. Remainder of south central Texas forecast on track. 


Previous discussion... /issued 839 am CDT Wednesday Apr 23 2014/ 


Update... 
issued dense fog advisory until 10 am for areas east of I-35. 
Visibilities of less than one quarter mile and near zero at times 
will persist until around 930 am and then dissipate by 10 am. 


Previous discussion... /issued 652 am CDT Wednesday Apr 23 2014/ 


Aviation... 
may see brief light fog and MVFR ceilings develop across southern 
taf sites around sunrise...but clouds should dissipate quickly 
this morning. A few thunderstorms will be possible out west near 
drt during the afternoon/evening hours...with a few showers 
overnight for the rest of the area. Expect more widespread low 
clouds overnight tonight with MVFR and possibly IFR ceilings after 
midnight. Winds remaining generally southeast in the 5 to 15 knots 
range. 


Previous discussion... /issued 337 am CDT Wednesday Apr 23 2014/ 


Short term (today through thursday)... 
moisture return from deep south Texas will fill in through around 
6000 feet this morning with scattered to broken cloud decks at 
several levels. Good mixing to fair weather cumulus in the 
afternoon should warm temperatures to similar numbers to that of 
Tuesday despite the slight increase in clouds. Late afternoon 
conditions could result in the breaking of the capping inversion 
over higher terrain of the Edwards Plateau and northern Mexico. The 
storms could approach severe levels given the middle level lapse 
rates...but stronger convective focus is expected to be mainly 
west and north of the forecast area. Weaker showers and thunderstorms 
will be possible overnight as the finer res models track the 
evening cells eastward along with a moisture axis and weak middle 
level energy that is in phase with a shallow upper trough passing 
through the central/Southern Plains. As the moisture axis becomes 
confined to the coastal plains Thursday...so GOES the chance for 
showers and isolated thunderstorms. With drier air filling in from 
the west...temperature trends continue to go upward for most areas 
Thursday. 


Long term (thursday night through tuesday)... 
the low level moisture pool moves back deeper inland Friday as a 
deepening upper trough over the western US increases surface 
winds. The progressive upper trough is expected to bring a 
slightly better chance of rain and strong thunderstorms Saturday 
night into Sunday. Model run-to-run trends are slowing the 
system...so future forecasts may need to show more emphasis on 
Sunday. The trends also are showing good warming potential from 
downsloping winds Sunday into Monday...with a shift toward the 
cooler model solutions seen after a front arrives by early 
Tuesday. 


Fire weather... 
elevated fire weather conditions will be possible Monday through 
Wednesday from mainly west to northwest winds and dry conditions... 
as a large deepening upper low is slow to shift east across the 
central and eastern US. 


&& 


Preliminary point temps/pops... 
Austin Camp Mabry 88 65 88 64 87 / - 20 10 10 - 
Austin Bergstrom international Airport 88 64 88 63 87 / - 20 20 10 10 
New Braunfels Muni Airport 89 64 89 65 88 / - 20 20 10 10 
Burnet Muni Airport 86 64 88 62 87 / - 20 10 - - 
del Rio International Airport 93 68 96 68 94 / 20 20 10 10 - 
Georgetown Muni Airport 87 65 87 63 86 / - 20 10 10 - 
Hondo Muni Airport 94 66 94 65 94 / - 20 10 10 10 
San Marcos Muni Airport 88 64 88 64 87 / - 20 20 10 10 
La Grange - Fayette regional 86 65 86 65 87 / - 20 20 10 10 
San Antonio International Airport 91 65 90 66 90 / - 20 10 10 10 
Stinson Muni Airport 93 65 92 66 91 / - 20 20 10 10 


&& 


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


$$ 


Mesoscale/aviation...10 
synoptic/grids...04 
public service/data collection...12 










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