What is the weather in San Marcos, TX right now?

The latest observation from San Marcos, San Marcos Municipal Airport was 68°F and clear, reported at 10/26/2026, 10:25 PM CDT.

Will it rain in San Marcos, TX in the next 24 hours?

The NWS hourly forecast does not show any hour with a 50% or higher chance of precipitation in the next 24 hours.

What is the 10-day forecast for San Marcos, TX?

The first 8 days come from the National Weather Service forecast. Days 9 to 10 (Nov 3 to Nov 4) come from the NOAA National Blend of Models, with highs of 77°F to 79°F. Model guidance this far out often changes.

What time is sunrise and sunset in San Marcos, TX today?

Sunrise is about 7:41 AM CDT and sunset is about 6:50 PM CDT (calculated for the center of the area, within a few minutes).

What is the normal October weather in San Marcos, TX?

At San Marcos, the 1991 to 2020 normal high in October is 82°F and the normal low is 58°F.

Checked Oct 26, 2026

San Marcos, TX Weather

Current conditions, hourly and 10-day forecast from the National Weather Service. Times are local (CDT).

San Marcos, TX current weather

68°F

Clear

H -- / L 63°Feels like 68°

No rain expected in the next 12 hours

Observed at San Marcos, San Marcos Municipal Airport (5.6 mi away), 10/26/2026, 10:25 PM CDT

Hourly forecast

NWS, updated 6:44 PM

Now69°
Tue12 AM68°
1 AM68°
2 AM66°
3 AM66°
4 AM65°
5 AM64°
6 AM64°
7 AM64°10%
8 AM63°10%
9 AM65°10%
10 AM70°23%
11 AM73°23%
12 PM75°23%
1 PM78°29%
2 PM79°29%
3 PM79°29%
4 PM81°18%
5 PM79°18%
6 PM79°18%
7 PM76°
8 PM71°
9 PM70°
10 PM69°
11 PM68°
Wed12 AM67°
1 AM66°
2 AM66°
3 AM65°
4 AM65°
5 AM65°
6 AM65°
7 AM65°24%
8 AM64°24%
9 AM67°24%
10 AM72°24%
11 AM75°24%
12 PM78°24%
1 PM81°30%
2 PM83°30%
3 PM84°30%
4 PM84°30%
5 PM83°30%
6 PM81°30%
7 PM78°
8 PM76°
9 PM73°
10 PM71°

10-day forecast

Tap a day for details

Today10/26Low 63°High
Tonight: Mostly cloudy, with a low around 63. East southeast wind around 0 mph.
Mostly Cloudy
Tue10/2729% chance of precipitationLow 64°High 81°
Tuesday: A slight chance of rain showers between 10am and 1pm, then a chance of showers and thunderstorms. Mostly cloudy, with a high near 81. East wind 0 to 5 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
Tuesday Night: A slight chance of showers and thunderstorms before 7pm. Partly cloudy, with a low around 64. East southeast wind 0 to 5 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
Slight Chance Rain Showers then Chance Showers And Thunderstorms
Wed10/2830% chance of precipitationLow 66°High 84°
Wednesday: A slight chance of rain showers between 7am and 1pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 84. East southeast wind 0 to 5 mph. Chance of precipitation is 30%.
Wednesday Night: A chance of showers and thunderstorms before 7pm. Mostly cloudy, with a low around 66. Southeast wind 0 to 5 mph. Chance of precipitation is 30%.
Slight Chance Rain Showers then Chance Showers And Thunderstorms
Thu10/2952% chance of precipitationLow 64°High 80°
Thursday: A slight chance of rain showers between 7am and 1pm, then a chance of showers and thunderstorms. Mostly cloudy, with a high near 80. East southeast wind around 5 mph. Chance of precipitation is 50%.
Thursday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 64. East southeast wind around 5 mph. Chance of precipitation is 50%.
Chance Showers And Thunderstorms
Fri10/3055% chance of precipitationLow 64°High 78°
Friday: Showers and thunderstorms likely. Mostly cloudy, with a high near 78. East southeast wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.
Friday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 64. East southeast wind 0 to 5 mph. Chance of precipitation is 50%.
Showers And Thunderstorms Likely
Sat10/3115% chance of precipitationLow 66°High 83°
Saturday: A slight chance of rain showers. Partly sunny, with a high near 83. Chance of precipitation is 20%.
Saturday Night: A slight chance of rain showers before 7pm. Partly cloudy, with a low around 66. Chance of precipitation is 20%.
Slight Chance Rain Showers
Sun11/1Low 68°High 85°
Sunday: Partly sunny, with a high near 85.
Sunday Night: Partly cloudy, with a low around 68.
Partly Sunny
Mon11/2Low High 86°
Monday: Partly sunny, with a high near 86.
Partly Sunny
Model blend
Tue11/3Model blend12% chance of precipitationLow 50°High 79°
Tuesday: Partly cloudy. High near 79°. Low that night near 50°.
Computer model guidance from the NOAA National Blend of Models, not a forecast written by NWS forecasters. Expect changes this far out.
Wed11/4Model blendLow 49°High 77°
Wednesday: Partly cloudy. High near 77°. Low that night near 49°.
Computer model guidance from the NOAA National Blend of Models, not a forecast written by NWS forecasters. Expect changes this far out.

Forecast for 29.868, -97.954 from the NWS EWX office, updated 10/26/2026, 6:44 PM CDT · Official forecast on weather.gov

Days 9 to 10: NOAA National Blend of Models, station KHYI (San Marcos Muni, 6 mi), model run 10/26/2026, 9:00 PM CDT

Forecaster's discussionIssued 10/26/2026, 7:03 PM CDT

: New AVIATION:

Key messages

Updated at 642 PM CDT Mon Oct 26 2026

- Isolated to scattered showers tonight through Wednesday.

- Locally heavy rain possible Thursday and Friday.

- Mild to warm conditions continue through the week.

Short term

(Tonight through Tuesday night) Issued at 1248 PM CDT Mon Oct 26 2026

Upper air analysis this morning shows southwesterly flow over TX with a ridge to the east and trough to the west. The low level flow is from the east across our CWA. There are isolated to scattered showers from northern Mexico to west Texas in the diffluent flow aloft. Some showers could spread over our western counties this afternoon and continue through the early evening. Low temperatures will be within a couple of degrees of Monday morning's. Tuesday the upper pattern will shift toward the east while to the low level flow turns a little toward the southeast. This will bring a bit more moist air across the Coastal Plains to the central part of our CWA. There will be another chance for isolated to scattered showers with a few thunderstorms possible. The best chances for rain will be along and south of I-10/Hwy90. Cloudiness will keep high temperatures down near Monday's highs. There may be some lingering showers Tuesday night, but most places will likely be dry. Temperatures will be about the same as Monday night.

Long term

(Wednesday through next Monday) Issued at 1248 PM CDT Mon Oct 26 2026

Another mid to upper level trough will dig down along the west coast and keep the flow over Texas southwesterly for the latter half of the week. The low level flow will continue to be southeasterly. PW values will increase from the southeast to northwest Wednesday into Thursday. A shortwave trough in the southwesterly flow aloft will interact with this moist airmass making showers and thunderstorms likely Thursday into early Friday. Models show PW 1.75-2.00 inches over the western half of our CWA which could lead to locally heavy rain. WPC has this area in the slight (Level 2 of 4) risk for rainfall to exceed flash flood guidance Thursday. Friday evening the upper shortwave will move away to the northeast, there still may be enough lift for isolated showers Friday night and Saturday. Dry weather will return for Saturday night through Monday.

With cloudy skies and rain, temperatures will be cooler Thursday and Friday with highs mostly in the 70s. The weekend should be warmer with less cloudiness and mainly dry weather.

Aviation

(00Z TAFS) Issued at 642 PM CDT Mon Oct 26 2026

VFR CIGs expected for all sites until early pre dawn hours (10Z/12Z) when MVFR CIGs return. Added in some TEMPOs for -SHRAs for KSAT and KSSF in the morning. There is the potential to see IFR CIGs at the two sites however confidence remains low at this time and will continue to monitor and amend as needed. Otherwise expect VFR CIGs to return late in the morning/early afternoon as moisture may stick around helping to keep the low cloud deck over the area. For KDRT continued prevailing VCSH for next few hours as -SHRAs continue to remain near the terminal. Otherwise VFR CIGs to return to MVFR by dawn before VFR CIGs continue late tomorrow afternoon.

Preliminary point temps/pops

Austin Camp Mabry 63 82 63 84 / 0 10 10 20 Austin Bergstrom Intl Airport 62 83 62 85 / 0 10 10 30 New Braunfels Muni Airport 63 82 62 84 / 0 30 10 30 Burnet Muni Airport 61 79 62 81 / 0 10 0 10 Del Rio Intl Airport 64 83 65 84 / 20 20 20 0 Georgetown Muni Airport 61 82 62 84 / 0 0 0 10 Hondo Muni Airport 64 81 63 84 / 0 30 20 10 San Marcos Muni Airport 62 83 62 85 / 0 30 10 40 La Grange - Fayette Regional 62 83 63 86 / 0 20 20 50 San Antonio Intl Airport 65 80 64 83 / 0 40 10 10 Stinson Muni Airport 66 81 65 84 / 0 40 10 10

Watches, warnings and advisories

None.

From the National Weather Service; may be delayed. Not for life-safety decisions. In an emergency, call 911.

Next 6 hours

NWS hourly forecast

Now69°Mostly Cloudy1%0 mph
12 AM68°Mostly Cloudy1%0 mph
1 AM68°Mostly Cloudy1%0 mph
2 AM66°Mostly Cloudy1%0 mph
3 AM66°Mostly Cloudy1%0 mph
4 AM65°Mostly Cloudy2%0 mph

Hourly details

Next 7 days: temperature chart, feels like, rain and snow amounts, sky cover, wind and gustsShow

Line: temperature °F. Bars: chance of precipitation.

MonNow69° 1% Sky 60%0g6
Tue 10/2712 AM68° 1% Sky 70%0g6
1 AM68° 1% Sky 63%0g6
2 AM66° 1% Sky 77%0g5
3 AM66° 1% Sky 65%0g6
4 AM65° 2% Sky 77%0g6
5 AM64° 2% Sky 75%0g6
6 AM64° 2% Sky 76%0g6
7 AM64° 10% Sky 81%0g5
8 AM63° 10% Sky 69%0g5
9 AM65° 10% Sky 75%0g6
10 AM70° 23% Sky 78%5
11 AM73° 23% Sky 81%5g12
12 PM75° 23% Sky 83%5g13
1 PM78° 29% Sky 86%5g14
2 PM79° 29% Sky 78%5g14
3 PM79° 29% Sky 73%5g14
4 PM81° 18% Sky 69%5g15
5 PM79° 18% Sky 45%5g14
6 PM79° 18% Sky 47%5g14
7 PM76° 3% Sky 41%5g12
8 PM71° 3% Sky 35%5
9 PM70° 3% Sky 32%5
10 PM69° 0% Sky 25%0g6
11 PM68° 0% Sky 24%0g5
Wed 10/2812 AM67° 0% Sky 19%0
1 AM66° 0% Sky 24%0
2 AM66° 0% Sky 25%0
3 AM65° 0% Sky 41%0
4 AM65° 8% Sky 61%0
5 AM65° 8% Sky 66%0
6 AM65° 8% Sky 65%0
7 AM65° 24%0.01"Sky 73%0g5
8 AM64° 24%0.01"Sky 59%0g5
9 AM67° 24%0.01"Sky 68%0g6
10 AM72° 24%0.01"Sky 77%5
11 AM75° 24%0.01"Sky 70%5
12 PM78° 24%0.01"Sky 63%5g12
1 PM81°Feels 84°30% Sky 56%5g13
2 PM83°Feels 87°30% Sky 53%5g13
3 PM84°Feels 87°30% Sky 50%5g13
4 PM84°Feels 87°30% Sky 47%5g13
5 PM83°Feels 86°30% Sky 53%5g13
6 PM81°Feels 84°30% Sky 60%5g12
7 PM78° 5% Sky 66%5g12
8 PM76° 5% Sky 66%5g10
9 PM73° 5% Sky 66%5g10
10 PM71° 5% Sky 66%5
11 PM70° 5% Sky 71%5
Thu 10/2912 AM69° 5% Sky 77%0g7
1 AM69° 2% Sky 82%0g6
2 AM68° 2% Sky 82%0g6
3 AM68° 2% Sky 81%0g6
4 AM68° 2% Sky 81%0g6
5 AM67° 2% Sky 82%0g6
6 AM66° 2% Sky 82%5
7 AM66° 18% Sky 83%5
8 AM68° 18% Sky 82%5
9 AM70° 18% Sky 80%5
10 AM72° 18% Sky 79%5
11 AM74° 18% Sky 80%5g12
12 PM76° 18% Sky 80%5g14
1 PM77° 52%0.02"Sky 81%5g15
2 PM79° 52%0.02"Sky 81%5g16
3 PM79° 52%0.02"Sky 80%5g16
4 PM79° 52%0.02"Sky 80%5g16
5 PM78° 52%0.02"Sky 82%5g15
6 PM77° 52%0.02"Sky 84%5g13
7 PM75° 30% Sky 86%5g10
8 PM73° 30% Sky 86%5g10
9 PM71° 30% Sky 86%5
10 PM70° 30% Sky 86%5
11 PM69° 30% Sky 86%5
Fri 10/3012 AM69° 30% Sky 86%5
1 AM68° 38% Sky 80%5
2 AM67° 38% Sky 80%5
3 AM67° 38% Sky 80%5
4 AM66° 38% Sky 80%5
5 AM65° 38% Sky 80%5
6 AM64° 38% Sky 80%5
7 AM64° 55%0.02"Sky 73%5g10
8 AM65° 55%0.02"Sky 73%5g12
9 AM67° 55%0.02"Sky 73%5g12
10 AM69° 55%0.02"Sky 73%5g13
11 AM71° 55%0.02"Sky 73%5g15
12 PM72° 55%0.02"Sky 73%5g17
1 PM74° 46%0.01"Sky 76%10g18
2 PM75° 46%0.01"Sky 76%10g20
3 PM77° 46%0.01"Sky 76%10g20
4 PM77° 46%0.01"Sky 76%5g18
5 PM77° 46%0.01"Sky 76%5g17
6 PM76° 46%0.01"Sky 76%5g15
7 PM74° 15% Sky 69%5g13
8 PM72° 15% Sky 69%5g10
9 PM70° 15% Sky 69%5
10 PM68° 15% Sky 69%5
11 PM67° 15% Sky 69%5
Sat 10/3112 AM66° 15% Sky 69%0g5
1 AM66° 15% Sky 68%0g5
2 AM66° 15% Sky 68%0g5
3 AM65° 15% Sky 68%0g5
4 AM65° 15% Sky 68%0g5
5 AM65° 15% Sky 68%0g5
6 AM64° 15% Sky 68%5
7 AM65° 15% Sky 76%5
8 AM67° 15% Sky 76%5
9 AM69° 15% Sky 76%5
10 AM72° 15% Sky 76%5
11 AM75° 15% Sky 76%5
12 PM77° 15% Sky 76%5g10
1 PM79° 15% Sky 60%5g12
2 PM81°Feels 85°15% Sky 60%5g13
3 PM82°Feels 86°15% Sky 60%5g13
4 PM82°Feels 85°15% Sky 60%5g12
5 PM81°Feels 84°15% Sky 60%5g10
6 PM80°Feels 83°15% Sky 60%0g8
7 PM78° 6% Sky 35%0g6
8 PM76° 6% Sky 35%0g5
9 PM73° 6% Sky 35%0
10 PM71° 6% Sky 35%0
11 PM70° 6% Sky 35%0
Sun 11/112 AM69° 6% Sky 35%0
1 AM69° 2% Sky 51%0
1 AM69° 2% Sky 51%0
2 AM68° 2% Sky 51%0
3 AM68° 2% Sky 51%0
4 AM67° 2% Sky 51%0
5 AM67° 2% Sky 51%0g5
6 AM67° 4% Sky 64%0g5
7 AM69° 4% Sky 64%0g6
8 AM71° 4% Sky 64%5
9 AM74° 4% Sky 64%5
10 AM77° 4% Sky 64%5g10
11 AM80°Feels 84°4% Sky 64%5g13
12 PM82°Feels 86°5% Sky 37%5g15
1 PM84°Feels 89°5% Sky 37%5g15
2 PM85°Feels 90°5% Sky 37%5g14
3 PM85°Feels 90°5% Sky 37%5g13
4 PM84°Feels 88°5% Sky 37%5g12
5 PM82°Feels 86°5% Sky 37%5g10
6 PM80°Feels 83°3% Sky 23%5
7 PM78° 3% Sky 23%5
8 PM75° 3% Sky 23%5
9 PM73° 3% Sky 23%5
10 PM72° 3% Sky 23%5
11 PM71° 3% Sky 23%5
Mon 11/212 AM70° 4% Sky 51%5
1 AM69° 4% Sky 51%5g10
2 AM69° 4% Sky 51%5g12
3 AM69° 4% Sky 51%5g13
4 AM69° 4% Sky 51%5g13
5 AM68° 4% Sky 51%5g13
6 AM69° 5% Sky 67%5g13
7 AM70° 5% Sky 67%10g15
8 AM73° 5% Sky 67%10g17

Temperature °F · chance of precipitation · amount in inches (T = trace) · sky cover · wind and gusts (g) in mph

NWS hourly forecast updated 10/26/2026, 6:44 PM CDT

Rain and snow totals

Next 3 days, NWS forecast grid

Rain (liquid): 0.20 in
Snow: 0.00 in
Ice: 0.00 in

Radar and satellite

National radar

NEXRAD (last 50 min) and GOES

Latest

Nearby hazards

Texas hazards

Severe storm and flash flood outlooks, expected rain, river flooding and wildfires near this area

Severe storm outlook today:No thunderstorm risk area over this locationOutlook map
Excessive rainfall outlook (flash flood risk):Could not check the Weather Prediction Center outlook right now.
River gauges within 40 miles at or above flood stage: None reported
Active wildfires within 50 miles: None reported

UV and air quality forecast

EPA and AirNow

UV index today (San Marcos): 5Moderate

UV index guide · Air quality

Drought

By county

Hays County, week of 10/20/2026

100% of the county is in moderate drought or worse.

Frequently asked questions

What is the weather in San Marcos, TX right now?: The latest observation from San Marcos, San Marcos Municipal Airport was 68°F and clear, reported at 10/26/2026, 10:25 PM CDT.
Will it rain in San Marcos, TX in the next 24 hours?: The NWS hourly forecast does not show any hour with a 50% or higher chance of precipitation in the next 24 hours.
What is the 10-day forecast for San Marcos, TX?: The first 8 days come from the National Weather Service forecast. Days 9 to 10 (Nov 3 to Nov 4) come from the NOAA National Blend of Models, with highs of 77°F to 79°F. Model guidance this far out often changes.
What time is sunrise and sunset in San Marcos, TX today?: Sunrise is about 7:41 AM CDT and sunset is about 6:50 PM CDT (calculated for the center of the area, within a few minutes).
What is the normal October weather in San Marcos, TX?: At San Marcos, the 1991 to 2020 normal high in October is 82°F and the normal low is 58°F.

Sun and moon

Local time, center of the area

Sunrise: 7:41 AM
Sunset: 6:50 PM
Daylight: 11 hr 9 min
Moon: Full Moon 99% lit

First light (civil dawn): 7:16 AM
Last light (civil dusk): 7:14 PM
Moonrise: 6:56 PM
Moonset: 8:10 AM

Normal October weather

Climate

Normal October high 82°, low 58°, precipitation 4.41 in for the month. 1991 to 2020 normals at San Marcos, 1 mi away.

Other places nearby

Data sources

National Weather Service APINOAA
National Blend of Models (NBM) text guidanceNOAA National Weather Service
Convective Outlooks and Storm ReportsNOAA Storm Prediction Center
Excessive Rainfall Outlook and Quantitative Precipitation ForecastsNOAA Weather Prediction Center
National Water Prediction ServiceNOAA National Weather Service
WFIGS Current Wildland Fire IncidentsNational Interagency Fire Center
UV Index Forecast (Envirofacts)U.S. Environmental Protection Agency and NOAA
AirNowU.S. Environmental Protection Agency
NWS HeatRisk (experimental)NOAA National Weather Service
U.S. Drought MonitorNational Drought Mitigation Center, USDA and NOAA
BEACON 2.0 Beach Advisory and Closing On-line NotificationU.S. Environmental Protection Agency
U.S. Climate Normals 1991-2020NOAA National Centers for Environmental Information
Tides & Currents (CO-OPS API)NOAA Center for Operational Oceanographic Products and Services
NEXRAD radar tilesIowa Environmental Mesonet, Iowa State University
GOES-East and GOES-West GeoColor imageryNOAA NESDIS Center for Satellite Applications and Research

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About this data

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