SAN MARCOS, TX 78666 Weather Forecast & Current Conditions

Enter ZIP code or City, State   
    


SAN MARCOS, TX
Current Weather

4:56 AM CDT APR 28, 2025
Scattered Clouds
72°F
Feels Like: 72°F
Dewpoint: 72°F
Rel. Hum.: 100%
Visibility: 10 miles
Wind: S at 10 mph
Pressure: 29.98 inches
Last 72 hours

Local Area Snow Depth

Texas Current Weather

Texas MOS Forecast Weather


Weather Map


(Automated weather data from NWS/FAA)
10-Day model forecast maps
2024 Hurricanes

SAN MARCOS, TX 78666
Weather Forecast

Snowfall Forecast pages
Snow Depth pages
TODAY
Mostly cloudy. Highs in the upper 80s. South winds 15 to 20 mph with gusts up to 30 mph.
TONIGHT
Cloudy. Lows in the upper 60s. South winds 10 to 15 mph with gusts up to 30 mph.
TUESDAY
Mostly cloudy. Highs in the mid 80s. South winds 10 to 15 mph with gusts up to 30 mph.
TUESDAY NIGHT
Cloudy. A slight chance of showers and thunderstorms after midnight. Lows in the upper 60s. Southeast winds 10 to 15 mph with gusts up to 30 mph.
WEDNESDAY
Mostly cloudy. A chance of showers with a slight chance of thunderstorms in the morning, then showers likely with a chance of thunderstorms in the afternoon. Highs in the mid 80s. South winds 15 to 20 mph with gusts up to 30 mph. Chance of rain 60 percent.
WEDNESDAY NIGHT
Partly cloudy with a chance of showers and thunderstorms in the evening, then mostly cloudy after midnight. Lows in the mid 60s. Chance of rain 30 percent.
THURSDAY AND THURSDAY NIGHT
Partly cloudy with a slight chance of showers and thunderstorms. Highs in the lower 90s. Lows in the mid 60s.
FRIDAY
Mostly cloudy in the morning, then becoming partly cloudy. A chance of showers and thunderstorms. Highs in the upper 80s. Chance of rain 50 percent.
FRIDAY NIGHT AND SATURDAY
Mostly cloudy with a chance of showers and thunderstorms. Lows in the mid 60s. Highs in the lower 80s. Chance of rain 40 percent.
SATURDAY NIGHT AND SUNDAY
Mostly cloudy with a chance of showers and thunderstorms. Lows in the mid 60s. Highs in the lower 80s. Chance of rain 30 percent.

Visible Weather Satellite
SAN MARCOS, TX 78666
Infrared Weather Satellite
SAN MARCOS, TX 78666
NEXRAD Weather Radar
SAN MARCOS, TX 78666

SAN MARCOS, TX 3 hourly weather forecast

weather forecast created  8:00 PM EDT  4/27/2025
Monday
28 APR 2025
SAN MARCOS, TX 78666 weather forecast Day 1, 0 hours 1 AM 73° 73° Mostly Cloudy 2%

0% Thunder
( 9% severe)
S   12 93% 71°
Low 69° SAN MARCOS, TX 78666 weather forecast Day 1, 3 hours 4 AM 72° 72° Mostly Cloudy S   12 93% 70°
High 89° SAN MARCOS, TX 78666 weather forecast Day 1, 6 hours 7 AM 70° 70° Overcast 7%

0% Thunder
( 14% severe)
S   12 100% 70°

Mostly Cloudy




Breezy
SAN MARCOS, TX 78666 weather forecast Day 1, 9 hours 10 AM 76° 77° Mostly Cloudy S   15 85% 71°
SAN MARCOS, TX 78666 weather forecast Day 1, 12 hours 1 PM 83° 87° Mostly Cloudy 2%

0% Thunder
( 11% severe)
S   18 65% 70°
SAN MARCOS, TX 78666 weather forecast Day 1, 15 hours 4 PM 88° 91° Mostly Cloudy SSE   21 50% 67°
SAN MARCOS, TX 78666 weather forecast Day 1, 18 hours 7 PM 84° 86° Mostly Cloudy 1%

0% Thunder
( 9% severe)
SSE   21 55% 66°
SAN MARCOS, TX 78666 weather forecast Day 1, 21 hours 10 PM 75° 75° Mostly Cloudy S   15 79% 68°
Tuesday
29 APR 2025
SAN MARCOS, TX 78666 weather forecast Day 2, 0 hours 1 AM 72° 72° Mostly Cloudy 1%

0% Thunder
( 9% severe)
S   12 93% 70°
Low 69° SAN MARCOS, TX 78666 weather forecast Day 2, 3 hours 4 AM 71° 71° Mostly Cloudy SSE   12 97% 70°
High 89° SAN MARCOS, TX 78666 weather forecast Day 2, 6 hours 7 AM 70° 70° Overcast 1%

0% Thunder
( 12% severe)
SSE   10 97% 69°

Mostly Cloudy



SAN MARCOS, TX 78666 weather forecast Day 2, 9 hours 10 AM 76° 77° Mostly Cloudy SSE   15 82% 70°
SAN MARCOS, TX 78666 weather forecast Day 2, 12 hours 1 PM 83° 86° Mostly Cloudy 2%

0% Thunder
( 8% severe)
SSE   18 61% 68°
SAN MARCOS, TX 78666 weather forecast Day 2, 15 hours 4 PM 87° 89° Mostly Cloudy SSE   20 48% 65°
SAN MARCOS, TX 78666 weather forecast Day 2, 18 hours 7 PM 83° 84° Mostly Cloudy 2%

0% Thunder
( 9% severe)
SSE   21 53% 64°
SAN MARCOS, TX 78666 weather forecast Day 2, 21 hours 10 PM 75° 75° Mostly Cloudy SSE   16 79% 68°

SAN MARCOS, TX extended weather forecast

Wednesday
30 APR 2025
Thursday
1 MAY 2025
Friday
2 MAY 2025
Saturday
3 MAY 2025
Sunday
4 MAY 2025
Low 73° Low 69° Low 67° Low 65° Low 61°
High 88° High 95° High 90° High 81° High 84°
SAN MARCOS, TX 78666 weather forecast Day 3 SAN MARCOS, TX 78666 weather forecast Day 4 SAN MARCOS, TX 78666 weather forecast Day 5 SAN MARCOS, TX 78666 weather forecast Day 6 SAN MARCOS, TX 78666 weather forecast Day 7
Overcast
35% Rain
Partly Cloudy
30% Rain
Partly Cloudy
19% Rain
Overcast
51% Rain
Overcast
39% Rain
SELECT BOX EXAMPLES:
for LOCAL WEATHER:
SNOW DEPTH:
LOCAL WEATHER RADAR:
STATE WEATHER MAP:
San Marcos, TX
San Marcos, TX snow
San Marcos, TX radar
TX map
-or-
-or-
-or-
 
78666
78666 snow
78666 radar
 
-or-
-or-
 
 
TX
TX snow
 
 
Copyright © 2024 WeatherStreet.com
Put our free WeatherStreet weather lookup on your web page.
Terms & Conditions