Current Conditions

San Marcos, Texas

80°F27°C
Drizzle

Wind

S 5 mph9 km/h

Humidity

72%

Cloud Cover

41%

As of Wednesday, September 23, 2026 at 12:54 AM CDT

Today's Outlook

Day

Mostly cloudy and hot, with a high of 95°F35°C and morning low of 74°F23°C. Breezy from the ESE at 5 to 7 mph7 to 12 km/h. Heat risk in the afternoon.

Night

Mostly cloudy, with a low around 77°F25°C. Breezy from the SE at 6 to 7 mph9 to 12 km/h. 32% chance of drizzle in the evening.

7-Day Forecast

DayConditionHigh (°F)Low (°F)Precip (mm)Cloud Cover (%)Wind (mph)
DrizzleHigh 95°F35°CFeels 99°F37°CLow 74°F23°CPrecip 0.02 in0.4 mm32%Cloud 75%Wind SE 5 mph8 km/hWednesday: Mostly cloudy and hot, with a high of 95°F35°C and morning low of 74°F23°C. Breezy from the ESE at 5 to 7 mph7 to 12 km/h. Heat risk in the afternoon. Wednesday Night: Mostly cloudy, with a low around 77°F25°C. Breezy from the SE at 6 to 7 mph9 to 12 km/h. 32% chance of drizzle in the evening.
HotHigh 94°F35°CFeels 98°F37°CLow 74°F23°CPrecip 0 in0.1 mm4%Cloud 77%Wind ESE 5 mph8 km/hThursday: Mostly cloudy and hot, with a high of 94°F35°C and morning low of 74°F23°C. Breezy from the ESE at 5 to 7 mph8 to 11 km/h. Heat risk in the afternoon. Thursday Night: Overcast, with a low around 76°F25°C. Light wind from the SE around 5 mph8 km/h.
Partly CloudyHigh 94°F34°CLow 75°F24°CPrecip 0 in0.1 mm2%Cloud 57%Wind SE 4 mph7 km/hFriday: Mostly cloudy and hot, with a high of 94°F34°C and morning low of 75°F24°C. Light wind from the ESE around 4 mph6 km/h. Humid. Friday Night: Mostly cloudy, with a low around 77°F25°C. Light wind from the SE around 5 mph8 km/h.
Partly CloudyHigh 94°F34°CLow 73°F23°CPrecip 0 in0 mmCloud 71%Wind SSE 5 mph8 km/hSaturday: Overcast and hot, with a high of 94°F34°C and morning low of 73°F23°C. Light wind from the S around 4 mph7 km/h. Humid. Saturday Night: Mostly cloudy, with a low around 75°F24°C. Light wind from the SE around 6 mph9 km/h.
HotHigh 97°F36°CLow 74°F23°CPrecip 0.01 in0.2 mm9%Cloud 45%Wind S 5 mph9 km/hSunday: Partly cloudy and hot, with a high of 97°F36°C and morning low of 74°F23°C. Light wind from the SSW around 5 mph8 km/h. Heat risk in the afternoon. Sunday Night: Mostly cloudy, with a low around 76°F25°C. Breezy from the SSE at 6 to 7 mph10 to 11 km/h.
HotHigh 96°F36°CLow 75°F24°CPrecip 0.01 in0.2 mm8%Cloud 37%Wind S 7 mph11 km/hMonday: Partly cloudy and hot, with a high of 96°F36°C and morning low of 75°F24°C. Light wind from the S around 6 mph10 km/h. Heat risk in the afternoon. Monday Night: Partly cloudy, with a low around 78°F25°C. Breezy from the SSE at 8 to 10 mph12 to 16 km/h.
ShowersHigh 94°F34°CFeels 98°F37°CLow 76°F24°CPrecip 0.09 in2.4 mm26%Cloud 52%Wind S 8 mph14 km/hTuesday: Mostly cloudy and hot, with a high of 94°F34°C and morning low of 76°F24°C. Breezy from the S at 8 to 9 mph13 to 15 km/h. 13% chance of drizzle throughout the day. Heat risk in the afternoon. Tuesday Night: Partly cloudy, with a low around 77°F25°C. Breezy from the SSE at 8 to 9 mph14 to 15 km/h. 26% chance of showers in the evening.

15-Day Forecast

Day High Low Precip Cloud Cover Condition Wind
WednesdaySep 2395°F35°C
Feels 99°F37°C
74°F23°C0.02 in0.4 mm· 32%75%DrizzleSE 5 mph8 km/h
ThursdaySep 2494°F35°C
Feels 98°F37°C
74°F23°C0 in0.1 mm· 4%77%HotESE 5 mph8 km/h
FridaySep 2594°F34°C75°F24°C0 in0.1 mm· 2%57%Partly CloudySE 4 mph7 km/h
SaturdaySep 2694°F34°C73°F23°C0 in0 mm· —71%Partly CloudySSE 5 mph8 km/h
SundaySep 2797°F36°C74°F23°C0.01 in0.2 mm· 9%45%HotS 5 mph9 km/h
MondaySep 2896°F36°C75°F24°C0.01 in0.2 mm· 8%37%HotS 7 mph11 km/h
TuesdaySep 2994°F34°C
Feels 98°F37°C
76°F24°C0.09 in2.4 mm· 26%52%ShowersS 8 mph14 km/h
WednesdaySep 3089°F32°C74°F24°C0.38 in9.6 mm· 31%54%ShowersSE 8 mph13 km/h
ThursdayOct 187°F30°C68°F20°C0.14 in3.6 mm· 15%35%ShowersNNE 7 mph12 km/h
FridayOct 288°F31°C66°F19°C0.07 in1.8 mm· 10%26%DrizzleE 6 mph10 km/h
SaturdayOct 390°F32°C66°F19°C0.05 in1.2 mm· 10%27%DrizzleSSE 6 mph10 km/h
SundayOct 487°F31°C68°F20°C0.07 in1.9 mm· 15%34%DrizzleNE 7 mph12 km/h
MondayOct 587°F30°C66°F19°C0.07 in1.9 mm· 11%34%DrizzleENE 6 mph10 km/h
TuesdayOct 688°F31°C66°F19°C0.09 in2.2 mm· 14%35%DrizzleE 6 mph10 km/h
WednesdayOct 786°F30°C65°F18°C0.05 in1.3 mm· 13%30%DrizzleNNE 7 mph11 km/h

Nearby Cities

About This Forecast

This forecast is powered by WeatherMesh, the world's most advanced and accurate weather model powered by AI. WeatherMesh is built on proprietary data from WindBorne's Global Sounding Balloon constellation — the world's largest fleet of autonomous, long-duration weather balloons — collecting observations across 100% of Earth, including over oceans and remote regions where no other data exists.

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Coordinates: 29.8833°N, 97.9414°W·Elevation: 188m·Timezone: America/Chicago·Population: 60,684