Current Conditions

San Marcos, Texas

93°F34°C
Drizzle

Wind

E 6 mph9 km/h

Humidity

40%

Cloud Cover

36%

As of Tuesday, September 22, 2026 at 8:12 PM CDT

Today's Outlook

Night

Mostly cloudy, with a low around 77°F25°C. Breezy from the SE at 6 to 7 mph9 to 12 km/h. 26% 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 0.01 in0.3 mm26%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. 26% chance of drizzle in the evening.
HotHigh 94°F34°CFeels 98°F37°CLow 74°F23°CPrecip 0.01 in0.2 mm7%Cloud 70%Wind ESE 5 mph8 km/hThursday: Mostly cloudy and hot, with a high of 94°F34°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: Mostly cloudy, with a low around 76°F25°C. Breezy from the SE at 5 to 7 mph8 to 11 km/h.
HotHigh 94°F35°CLow 75°F24°CPrecip 0.01 in0.2 mm5%Cloud 54%Wind SE 4 mph7 km/hFriday: Mostly cloudy and hot, with a high of 94°F35°C and morning low of 75°F24°C. Light wind from the SE around 4 mph6 km/h. Heat risk in the afternoon. Friday Night: Mostly cloudy, with a low around 77°F25°C. Light wind from the SE around 5 mph8 km/h.
Partly CloudyHigh 94°F35°CLow 74°F23°CPrecip 0 in0 mmCloud 68%Wind S 5 mph9 km/hSaturday: Mostly cloudy and hot, with a high of 94°F35°C and morning low of 74°F23°C. Light wind from the SSW around 5 mph7 km/h. Humid. Saturday Night: Mostly cloudy, with a low around 76°F24°C. Breezy from the SSE at 6 to 7 mph10 to 11 km/h.
DrizzleHigh 96°F36°CLow 75°F24°CPrecip 0.01 in0.3 mm13%Cloud 51%Wind S 6 mph9 km/hSunday: Partly cloudy and hot, with a high of 96°F36°C and morning low of 75°F24°C. Light wind from the SSW around 5 mph8 km/h. Heat risk in the afternoon. Sunday Night: Mostly cloudy, with a low around 77°F25°C. Breezy from the SSE at 7 to 8 mph10 to 13 km/h. 13% chance of drizzle in the evening.
HotHigh 95°F35°CLow 75°F24°CPrecip 0.02 in0.5 mm9%Cloud 44%Wind S 7 mph11 km/hMonday: Partly cloudy and hot, with a high of 95°F35°C and morning low of 75°F24°C. Light wind from the S around 6 mph9 km/h. Heat risk in the afternoon. Monday Night: Mostly cloudy, with a low around 77°F25°C. Breezy from the SSE at 7 to 9 mph12 to 15 km/h.
ShowersHigh 93°F34°CFeels 98°F36°CLow 76°F25°CPrecip 0.11 in2.7 mm29%Cloud 58%Wind S 8 mph13 km/hTuesday: Mostly cloudy and hot, with a high of 93°F34°C and morning low of 76°F25°C. Breezy from the S at 8 to 9 mph13 to 15 km/h. 23% chance of showers throughout the day. Heat risk in the afternoon. Tuesday Night: Mostly cloudy, with a low around 77°F25°C. Breezy from the SSE at 8 to 9 mph13 to 14 km/h. 29% chance of showers throughout the night.

15-Day Forecast

Day High Low Precip Cloud Cover Condition Wind
WednesdaySep 2395°F35°C
Feels 99°F37°C
74°F23°C0.01 in0.3 mm· 26%75%DrizzleSE 5 mph8 km/h
ThursdaySep 2494°F34°C
Feels 98°F37°C
74°F23°C0.01 in0.2 mm· 7%70%HotESE 5 mph8 km/h
FridaySep 2594°F35°C75°F24°C0.01 in0.2 mm· 5%54%HotSE 4 mph7 km/h
SaturdaySep 2694°F35°C74°F23°C0 in0 mm· —68%Partly CloudyS 5 mph9 km/h
SundaySep 2796°F36°C75°F24°C0.01 in0.3 mm· 13%51%DrizzleS 6 mph9 km/h
MondaySep 2895°F35°C75°F24°C0.02 in0.5 mm· 9%44%HotS 7 mph11 km/h
TuesdaySep 2993°F34°C
Feels 98°F36°C
76°F25°C0.11 in2.7 mm· 29%58%ShowersS 8 mph13 km/h
WednesdaySep 3089°F32°C74°F24°C0.25 in6.3 mm· 30%54%ShowersSE 7 mph12 km/h
ThursdayOct 189°F31°C69°F21°C0.09 in2.4 mm· 17%38%DrizzleNE 7 mph11 km/h
FridayOct 289°F31°C67°F20°C0.08 in2 mm· 14%42%DrizzleESE 7 mph10 km/h
SaturdayOct 387°F31°C69°F21°C0.13 in3.3 mm· 21%52%ShowersSE 7 mph11 km/h
SundayOct 485°F30°C69°F20°C0.16 in4.1 mm· 22%50%ShowersNE 7 mph12 km/h
MondayOct 584°F29°C66°F19°C0.14 in3.5 mm· 21%48%ShowersNE 7 mph11 km/h
TuesdayOct 686°F30°C66°F19°C0.06 in1.4 mm· 14%41%DrizzleNE 7 mph11 km/h
WednesdayOct 785°F30°C65°F18°C0.07 in1.7 mm· 12%35%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