Current Conditions

San Marcos, Texas

96°F36°C
Hot

Feels like103°F39°C

Wind

SSW 5 mph8 km/h

Humidity

42%

Cloud Cover

72%

As of Wednesday, September 2, 2026 at 1:25 PM CDT

Today's Outlook

Day

Mostly cloudy and hot, with a high of 100°F38°C and morning low of 77°F25°C. Light wind from the SSW around 5 mph8 km/h. Heat risk in the afternoon.

Night

Mostly cloudy, with a low around 89°F31°C. Breezy from the SE at 8 to 11 mph12 to 17 km/h.

7-Day Forecast

DayConditionHigh (°F)Low (°F)Precip (mm)Cloud Cover (%)Wind (mph)
HotHigh 100°F38°CFeels 103°F39°CLow 77°F25°CPrecip 0 in0 mmCloud 68%Wind S 6 mph9 km/hWednesday: Mostly cloudy and hot, with a high of 100°F38°C and morning low of 77°F25°C. Light wind from the SSW around 5 mph8 km/h. Heat risk in the afternoon. Wednesday Night: Mostly cloudy, with a low around 89°F31°C. Breezy from the SE at 8 to 11 mph12 to 17 km/h.
DrizzleHigh 99°F37°CFeels 102°F39°CLow 79°F26°CPrecip 0.02 in0.5 mm33%Cloud 61%Wind SSE 9 mph14 km/hThursday: Mostly cloudy and hot, with a high of 99°F37°C and morning low of 79°F26°C. Breezy from the S at 7 to 8 mph12 to 13 km/h. 11% chance of drizzle. Heat risk in the afternoon. Thursday Night: Mostly cloudy, with a low around 81°F27°C. Breezy from the SSE at 10 to 11 mph17 to 18 km/h. 33% chance of drizzle in the evening.
ShowersHigh 96°F35°CFeels 101°F38°CLow 79°F26°CPrecip 0.07 in1.9 mm52%Cloud 56%Wind SSE 7 mph11 km/hFriday: Mostly cloudy and hot, with a high of 96°F35°C and morning low of 79°F26°C. Light wind from the SSE around 6 mph9 km/h. 20% chance of drizzle throughout the day. Heat risk in the afternoon. Friday Night: Mostly cloudy, with a low around 81°F27°C. Breezy from the SSE at 8 to 9 mph13 to 15 km/h. 52% chance of showers before dawn.
DrizzleHigh 95°F35°CFeels 101°F38°CLow 77°F25°CPrecip 0.04 in0.9 mm34%Cloud 51%Wind SE 5 mph9 km/hSaturday: Partly cloudy and hot, with a high of 95°F35°C and morning low of 77°F25°C. Light wind from the SE around 4 mph7 km/h. Heat risk in the afternoon. Saturday Night: Mostly cloudy, with a low around 79°F26°C. Breezy from the SE at 6 to 8 mph10 to 12 km/h. 34% chance of drizzle in the evening.
DrizzleHigh 95°F35°CFeels 101°F39°CLow 77°F25°CPrecip 0.04 in1.1 mm23%Cloud 36%Wind SSE 5 mph7 km/hSunday: Partly cloudy and hot, with a high of 95°F35°C and morning low of 77°F25°C — feels like 102°F39°C. Light wind from the SE around 4 mph6 km/h. 22% chance of drizzle throughout the day. Heat risk in the afternoon. Sunday Night: Partly cloudy, with a low around 78°F26°C. Light wind from the SSE around 5 mph8 km/h. 23% chance of drizzle in the evening.
ShowersHigh 95°F35°CFeels 102°F39°CLow 77°F25°CPrecip 0.05 in1.3 mm40%Cloud 36%Wind SSE 6 mph9 km/hMonday: Partly cloudy and hot, with a high of 95°F35°C and morning low of 77°F25°C — feels like 102°F39°C. Breezy from the SSE at 5 to 7 mph8 to 11 km/h. 16% chance of drizzle throughout the day. Heat risk in the afternoon. Monday Night: Partly cloudy, with a low around 79°F26°C. Breezy from the SSE at 7 to 8 mph11 to 13 km/h. 40% chance of showers in the evening.
ShowersHigh 93°F34°CFeels 100°F38°CLow 77°F25°CPrecip 0.11 in2.8 mm52%Cloud 52%Wind SSE 7 mph11 km/hTuesday: Mostly cloudy and hot, with a high of 93°F34°C and morning low of 77°F25°C — feels like 100°F38°C. Breezy from the SSE at 6 to 8 mph10 to 13 km/h. 21% chance of showers throughout the day. Heat risk in the afternoon. Tuesday Night: Mostly cloudy, with a low around 78°F26°C. Breezy from the SSE at 8 to 9 mph12 to 15 km/h. 52% chance of showers before dawn.

15-Day Forecast

Day High Low Precip Cloud Cover Condition Wind
WednesdaySep 2100°F38°C
Feels 103°F39°C
77°F25°C0 in0 mm· —68%HotS 6 mph9 km/h
ThursdaySep 399°F37°C
Feels 102°F39°C
79°F26°C0.02 in0.5 mm· 33%61%DrizzleSSE 9 mph14 km/h
FridaySep 496°F35°C
Feels 101°F38°C
79°F26°C0.07 in1.9 mm· 52%56%ShowersSSE 7 mph11 km/h
SaturdaySep 595°F35°C
Feels 101°F38°C
77°F25°C0.04 in0.9 mm· 34%51%DrizzleSE 5 mph9 km/h
SundaySep 695°F35°C
Feels 101°F39°C
77°F25°C0.04 in1.1 mm· 23%36%DrizzleSSE 5 mph7 km/h
MondaySep 795°F35°C
Feels 102°F39°C
77°F25°C0.05 in1.3 mm· 40%36%ShowersSSE 6 mph9 km/h
TuesdaySep 893°F34°C
Feels 100°F38°C
77°F25°C0.11 in2.8 mm· 52%52%ShowersSSE 7 mph11 km/h
WednesdaySep 993°F34°C
Feels 100°F38°C
77°F25°C0.12 in3 mm· 45%55%ShowersSSE 7 mph11 km/h
ThursdaySep 1095°F35°C
Feels 101°F39°C
77°F25°C0.04 in0.9 mm· 20%47%DrizzleSSE 7 mph12 km/h
FridaySep 1196°F36°C
Feels 102°F39°C
77°F25°C0.02 in0.5 mm· 13%41%DrizzleS 8 mph13 km/h
SaturdaySep 1296°F35°C
Feels 102°F39°C
78°F25°C0.06 in1.4 mm· 18%50%DrizzleS 9 mph14 km/h
SundaySep 1394°F35°C
Feels 100°F38°C
78°F25°C0.09 in2.2 mm· 25%53%DrizzleSSE 9 mph15 km/h
MondaySep 1494°F34°C
Feels 100°F38°C
78°F25°C0.13 in3.4 mm· 23%50%ShowersSSE 9 mph15 km/h
TuesdaySep 1594°F34°C
Feels 99°F37°C
77°F25°C0.1 in2.5 mm· 22%47%ShowersSSE 8 mph14 km/h
WednesdaySep 1694°F35°C
Feels 98°F37°C
76°F24°C0.06 in1.4 mm· 17%48%DrizzleSSE 8 mph12 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