SAN MARCOS, TX 78666 Weather Forecast & Current Conditions

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78666 WEATHER WARNINGS (SEVERE T-STORM & TORNADO)

CURRENT WEATHER
SAN MARCOS, TX Current Weather
3:56 PM CST NOV 30, 2025
Overcast 52°F
Feels Like:	47°F
Dewpoint:	30°F
Rel. Hum.:	43%
Visibility:	10 miles
Wind:	NE at 18 mph
Pressure:	30.20 inches
Last 72 hours
Local Area Snow Depth
Texas Current Weather
Texas MOS Forecast Weather

Regional Weather Maps

(Automated weather data from NWS/FAA)

78666 WEATHER FORECAST
10-Day model forecast maps 2025 Hurricanes	SAN MARCOS, TX 78666 Weather Forecast	Snowfall Forecast pages Snow Depth pages

THIS AFTERNOON
Cloudy and much cooler. Near steady temperature in the upper 40s. North winds 15 to 20 mph with gusts up to 30 mph.

TONIGHT
Cloudy. A slight chance of showers after midnight. Lows in the upper 30s. Northeast winds 10 to 15 mph. Chance of rain 20 percent.

MONDAY
Cloudy. A chance of showers, mainly in the morning. Highs around 50. North winds 5 to 10 mph. Chance of rain 30 percent.

MONDAY NIGHT
Mostly cloudy in the evening, then becoming partly cloudy. Lows in the mid 30s. North winds 5 to 10 mph.

TUESDAY
Partly cloudy in the morning, then clearing. Highs in the upper 50s. North winds 5 to 10 mph with gusts up to 20 mph, becoming east in the afternoon.

TUESDAY NIGHT
Mostly clear in the evening, then becoming partly cloudy. Lows in the upper 30s.

WEDNESDAY
Mostly cloudy. Highs in the mid 60s.

WEDNESDAY NIGHT
Cloudy. A slight chance of showers in the evening, then a chance of showers with a slight chance of thunderstorms after midnight. Lows in the upper 40s. Chance of rain 40 percent.

THURSDAY
Cloudy. A chance of showers and thunderstorms in the morning, then showers likely with a slight chance of thunderstorms in the afternoon. Cooler. Near steady temperature in the lower 50s. Chance of rain 60 percent.

THURSDAY NIGHT
Cloudy with a 50 percent chance of showers. Lows in the lower 40s.

FRIDAY
Mostly cloudy. A slight chance of showers in the morning. Highs in the lower 60s.

FRIDAY NIGHT
Partly cloudy with a slight chance of showers. Lows in the lower 40s.

SATURDAY
Partly cloudy in the morning, then clearing. Highs in the mid 60s.

78666 WEATHER SATELLITE LOOPS

Visible Weather Satellite
SAN MARCOS, TX 78666

Infrared Weather Satellite
SAN MARCOS, TX 78666

78666 WEATHER RADAR LOOP

NEXRAD Weather Radar
SAN MARCOS, TX 78666

MOS COMPUTER WEATHER FORECAST

SAN MARCOS, TX 3 hourly weather forecast

weather forecast created 7:00 AM EST 11/30/2025

DAY/DATE &
WEATHER FORECAST SUMMARY

Sunday
30 NOV 2025

12 PM

48°

41°

Mostly Cloudy

2%

0% Thunder
( 1% severe)

N 22

47%

29°

High 51°

3 PM

50°

43°

Mostly Cloudy

NNE 21

44%

29°

Overcast

Breezy

6 PM

47°

40°

Overcast

8%

0% Thunder
( 1% severe)

NNE 17

47%

28°

9 PM

45°

39°

Overcast

NNE 14

53%

29°

Monday
1 DEC 2025

12 AM

43°

37°

Overcast

23%
RAIN
<.01 in

0% Thunder
( 3% severe)

NNE 12

60%

30°

Low 40°

3 AM

42°

36°

Overcast

NNE 10

65%

31°

High 53°

6 AM

42°

36°

Overcast

33%
RAIN
<.01 in

0% Thunder
( 1% severe)

NNE 10

70%

33°

Overcast

Chance of Rain

9 AM

45°

40°

Overcast

NNE 9

71%

36°

12 PM

49°

45°

Overcast

18%
RAIN
<.01 in

0% Thunder
( 1% severe)

NNE 8

68%

39°

3 PM

51°

48°

Overcast

N 8

68%

41°

6 PM

50°

46°

Mostly Cloudy

9%

0% Thunder
( 1% severe)

NNE 9

71%

41°

9 PM

47°

42°

Mostly Cloudy

N 10

76%

40°

Tuesday
2 DEC 2025

12 AM

44°

38°

Mostly Cloudy

4%

0% Thunder
( 0% severe)

N 12

79%

38°

Low 36°

3 AM

41°

34°

Mostly Cloudy

N 12

76%

34°

High 57°

6 AM

38°

30°

Partly Cloudy

3%

0% Thunder
( 0% severe)

N 12

79%

32°

Partly Cloudy

9 AM

43°

37°

Partly Cloudy

N 12

65%

32°

12 PM

52°

48°

Partly Cloudy

1%

0% Thunder
( 0% severe)

NNE 10

44%

31°

3 PM

56°

54°

Partly Cloudy

NE 7

38%

31°

6 PM

50°

48°

Partly Cloudy

ESE 6

50%

32°


SAN MARCOS, TX extended weather forecast
Wednesday 3 DEC 2025	Thursday 4 DEC 2025	Friday 5 DEC 2025	Saturday 6 DEC 2025	Sunday 7 DEC 2025
Low 38°	Low 49°	Low 45°	Low 48°	Low 43°
High 68°	High 52°	High 61°	High 68°	High 68°

Mostly Cloudy 9% Rain	Overcast 80% Rain	Overcast 37% Rain	Overcast 22% Rain	Clear 15% Rain

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