Observed 12:56 AM CDT at KHYI

San Marcos, TX weather

Clear and 61°16°.

Forecasts agree

Now 61°16°

Clear

Wind: 3 mph5 km/h; From the south-southeast. Up to 10 mph16 km/h through 1 PM
Dew point: 56°13°; A little sticky
UV index: 0Low; High 1–4 PM · peak 6
Pressure: 30.16 inHg1021 hPa; Steady over the next 3 h

No precipitation expected in the next 2 hours.

From forecast models

Next 48 hours

About the same as this time yesterday (63°17° then, 61°16° now)

Good hours for

Low 60°16° tonight at 4 AM
Above 70°21° today by 10 AM
High 86°30° today at 4 PM

TonightNear 62°17° · Clear
This morningUp to 76°24° by 11 AM · Partly cloudy
This afternoonUp to 86°30° by 4 PM · Partly cloudy
TonightDown to 63°17° by 4 AM · Mostly cloudy
Tomorrow morningUp to 75°24° by 11 AM · Cloudy
Tomorrow afternoonUp to 83°28° by 5 PM · Cloudy
Tomorrow nightDown to 66°19° by midnight · Cloudy

Hourly forecast, next 48 hours, in the place's local time
Hour	Conditions	Temperature	Feels like	Precipitation	Wind	Humidity	Cloud cover	UV index
Sat 1a	Clear	63°17° (likely 63°17° to 67°19°)	63°17°	0%	5 mph8 km/h from S, gusts 9 mph14 km/h	84%	1%	0
Sat 2a	Clear	63°17° (likely 63°17° to 66°19°)	63°17°	0%	0 mph0 km/h, gusts 8 mph12 km/h	87%	0%	0
Sat 3a	Clear	61°16° (likely 61°16° to 64°18°)	61°16°	0%	0 mph0 km/h, gusts 5 mph8 km/h	93%	0%	0
Sat 4a	Clear	60°16° (likely 60°16° to 63°17°)	60°16°	0%	0 mph0 km/h, gusts 3 mph5 km/h	96%	7%	0
Sat 5a	Clear	60°16° (likely 60°16° to 62°17°)	60°16°	0%	0 mph0 km/h, gusts 3 mph5 km/h	96%	10%	0
Sat 6a	Clear	60°16° (likely 60°16° to 62°17°)	60°16°	0%	0 mph0 km/h, gusts 3 mph5 km/h	96%	15%	0
Sat 7a	Clear	60°16° (likely 60°16° to 63°17°)	60°16°	0%	0 mph0 km/h, gusts 4 mph7 km/h	96%	20%	0
Sat 8a	Sunny	61°16° (likely 61°16° to 64°18°)	61°16°	0%	0 mph0 km/h, gusts 5 mph8 km/h	97%	28%	0
Sat 9a	Partly sunny	65°18° (likely 65°18° to 68°20°)	65°18°	0%	5 mph8 km/h from ENE, gusts 10 mph16 km/h	87%	41%	1
Sat 10a	Partly sunny	71°22° (likely 71°22° to 72°22°)	71°22°	0%	5 mph8 km/h from ESE, gusts 14 mph22 km/h	73%	44%	2
Sat 11a	Sunny	76°24° (likely 76°24° to 77°25°)	76°24°	0%	10 mph16 km/h from SE, gusts 15 mph24 km/h	62%	46%	4
Sat 12p	Partly sunny	79°26° (likely 79°26° to 80°27°)	79°26°	0%	10 mph16 km/h from SE, gusts 16 mph25 km/h	56%	53%	5
Sat 1p	Mostly sunny	83°28° (likely 80°27° to 83°28°)	84°29°	0%	10 mph16 km/h from SE, gusts 15 mph25 km/h	49%	59%	6
Sat 2p	Partly sunny	84°29° (likely 82°28° to 85°29°)	84°29°	0%	10 mph16 km/h from SE, gusts 16 mph25 km/h	46%	44%	6
Sat 3p	Partly sunny	85°29° (likely 83°28° to 86°30°)	85°29°	0%	10 mph16 km/h from SE, gusts 16 mph26 km/h	45%	37%	6
Sat 4p	Partly sunny	86°30° (likely 85°29° to 86°30°)	86°30°	0%	10 mph16 km/h from SE, gusts 16 mph26 km/h	42%	39%	4
Sat 5p	Cloudy	85°29° (likely 84°29° to 86°30°)	85°29°	0%	10 mph16 km/h from SE, gusts 16 mph26 km/h	43%	70%	3
Sat 6p	Partly sunny	84°29° (likely 82°28° to 84°29°)	84°29°	0%	10 mph16 km/h from SE, gusts 18 mph28 km/h	44%	69%	1
Sat 7p	Cloudy	82°28° (likely 79°26° to 82°28°)	82°28°	0%	10 mph16 km/h from ESE, gusts 16 mph26 km/h	47%	71%	0
Sat 8p	Cloudy	78°26° (likely 77°25° to 78°26°)	78°26°	0%	10 mph16 km/h from SE, gusts 15 mph24 km/h	56%	68%	0
Sat 9p	Cloudy	75°24° (likely 74°23° to 76°24°)	75°24°	0%	10 mph16 km/h from SE, gusts 16 mph26 km/h	62%	64%	0
Sat 10p	Cloudy	73°23° (likely 73°23° to 74°23°)	73°23°	0%	10 mph16 km/h from SSE, gusts 18 mph29 km/h	68%	64%	0
Sat 11p	Cloudy	71°22° (likely 71°22° to 72°22°)	71°22°	0%	5 mph8 km/h from SSE, gusts 16 mph26 km/h	73%	65%	0
Sun 12a	Cloudy	69°21° (likely 69°21° to 71°22°)	69°21°	0%	5 mph8 km/h from SE, gusts 12 mph19 km/h	78%	66%	0
Sun 1a	Cloudy	67°19° (likely 67°19° to 69°21°)	67°19°	0%	5 mph8 km/h from SE, gusts 10 mph16 km/h	84%	64%	0
Sun 2a	Cloudy	66°19° (likely 66°19° to 68°20°)	66°19°	0%	5 mph8 km/h from SE, gusts 8 mph13 km/h	87%	65%	0
Sun 3a	Cloudy	64°18° (likely 64°18° to 67°19°)	64°18°	0%	5 mph8 km/h from ESE, gusts 6 mph9 km/h	90%	64%	0
Sun 4a	Cloudy	63°17° (likely 63°17° to 65°18°)	63°17°	0%	5 mph8 km/h from E, gusts 4 mph7 km/h	93%	65%	0
Sun 5a	Cloudy	63°17° (likely 63°17° to 65°18°)	63°17°	0%	5 mph8 km/h from E, gusts 4 mph7 km/h	93%	69%	0
Sun 6a	Cloudy	62°17° (likely 62°17° to 64°18°)	62°17°	0%	5 mph8 km/h from ENE, gusts 5 mph7 km/h	97%	78%	0
Sun 7a	Cloudy	62°17° (likely 62°17° to 64°18°)	62°17°	0%	5 mph8 km/h from ENE, gusts 5 mph7 km/h	97%	83%	0
Sun 8a	Cloudy	63°17° (likely 61°16° to 65°18°)	63°17°	0%	5 mph8 km/h from ENE, gusts 5 mph8 km/h	93%	84%	0
Sun 9a	Cloudy	66°19° (likely 66°19° to 68°20°)	66°19°	0%	5 mph8 km/h from E, gusts 6 mph10 km/h	84%	85%	1
Sun 10a	Cloudy	71°22° (likely 70°21° to 72°22°)	71°22°	0%	5 mph8 km/h from E, gusts 12 mph20 km/h	71%	92%	2
Sun 11a	Cloudy	75°24° (likely 74°23° to 75°24°)	75°24°	0%	10 mph16 km/h from ESE, gusts 13 mph21 km/h	60%	93%	3
Sun 12p	Cloudy	77°25° (likely 77°25° to 78°26°)	77°25°	0%	10 mph16 km/h from ESE, gusts 15 mph24 km/h	54%	93%	4
Sun 1p	Cloudy	80°27° (likely 79°26° to 81°27°)	81°27°	0%	10 mph16 km/h from ESE, gusts 14 mph23 km/h	47%	96%	4
Sun 2p	Cloudy	81°27° (likely 80°27° to 82°28°)	81°27°	0%	10 mph16 km/h from ESE, gusts 13 mph21 km/h	44%	96%	5
Sun 3p	Cloudy	82°28° (likely 80°27° to 83°28°)	82°28°	0%	10 mph16 km/h from ESE, gusts 14 mph22 km/h	41%	96%	4
Sun 4p	Cloudy	82°28° (likely 80°27° to 83°28°)	81°27°	0%	10 mph16 km/h from ESE, gusts 13 mph22 km/h	40%	97%	3
Sun 5p	Cloudy	83°28° (likely 79°26° to 83°28°)	82°28°	0%	5 mph8 km/h from ESE, gusts 13 mph22 km/h	37%	98%	2
Sun 6p	Cloudy	81°27° (likely 77°25° to 81°27°)	81°27°	0%	5 mph8 km/h from ESE, gusts 14 mph22 km/h	39%	98%	1
Sun 7p	Cloudy	79°26° (likely 75°24° to 79°26°)	79°26°	0%	5 mph8 km/h from E, gusts 12 mph19 km/h	41%	98%	0
Sun 8p	Cloudy	76°24° (likely 72°22° to 76°24°)	76°24°	0%	5 mph8 km/h from ESE, gusts 11 mph18 km/h	43%	99%	0
Sun 9p	Cloudy	73°23° (likely 70°21° to 74°23°)	73°23°	0%	5 mph8 km/h from ESE, gusts 13 mph21 km/h	48%	98%	0
Sun 10p	Cloudy	70°21° (likely 69°21° to 73°23°)	70°21°	0%	5 mph8 km/h from ESE, gusts 15 mph23 km/h	53%	94%	0
Sun 11p	Mostly cloudy	68°20° (likely 67°19° to 71°22°)	68°20°	0%	5 mph8 km/h from ESE, gusts 14 mph23 km/h	59%	77%	0
Mon 12a	Mostly cloudy	66°19° (likely 65°18° to 70°21°)	66°19°	0%	0 mph0 km/h, gusts 13 mph21 km/h	63%	77%	0

Days ahead

Shaded: typical range for these dates (1991–2020)

Today, Oct 24. Cloudy. High 86°30°, low 60°16°. Typical 80°27° / 55°13°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Partly sunny, 61°16°
  Dry
2. Afternoon
  noon–6 PM
  Partly sunny, 86°30°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 78°26°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 63°17°
  Dry
Official NWS forecast
Today: Mostly sunny, with a high near 86. East wind 0 to 10 mph, with gusts as high as 20 mph.
Tonight: Mostly clear, with a low around 60. South southeast wind 0 to 5 mph.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
85°29°–86°30°
Low, likely
60°16°–62°17°
Typical high / low
80°27° / 55°13°
Wind
13 mph21 km/h, gusts 22 mph35 km/h
UV peak
6
Tomorrow, Oct 25. Cloudy. High 83°28°, low 56°13°. Typical 79°26° / 55°13°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 63°17°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 83°28°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 76°24°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 59°15°
  Dry
Official NWS forecast
Day: Mostly cloudy, with a high near 83. East wind 5 to 10 mph.
Night: Mostly cloudy, with a low around 56. East southeast wind 0 to 5 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
80°27°–83°28°
Low, likely
56°13°–64°18°
Typical high / low
79°26° / 55°13°
Wind
14 mph23 km/h, gusts 25 mph41 km/h
UV peak
5
Monday, Oct 26. Cloudy. High 83°28°, low 62°17°. Typical 79°26° / 55°13°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Mostly sunny, 57°14°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 80°26°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 72°22°
  Dry
4. Overnight
  midnight–6 AM
  Partly cloudy, 64°18°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Partly sunny, with a high near 83. East northeast wind 0 to 5 mph.
Night: Mostly cloudy, with a low around 62. East southeast wind 0 to 5 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
78°26°–83°28°
Low, likely
55°13°–62°17°
Typical high / low
79°26° / 55°13°
Wind
11 mph17 km/h, gusts 23 mph36 km/h
UV peak
5
Tuesday, Oct 27. Showers. High 79°26°, low 60°16°. Typical 78°26° / 54°12°. Rain 0.1 in2.5 mm, 20% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 66°19°
  20% chance
2. Afternoon
  noon–6 PM
  Partly sunny, 78°26°
  20% chance · 0.03 in0.9 mm
3. Evening
  6 PM–midnight
  Clear, 71°22°
  20% chance · 0.01 in0.3 mm
4. Overnight
  midnight–6 AM
  Cloudy, 66°19°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: A slight chance of rain showers after 7am. Partly sunny, with a high near 79. East wind 0 to 5 mph. Chance of precipitation is 20%.
Night: A slight chance of rain showers before 7pm. Partly cloudy, with a low around 60. East northeast wind 0 to 5 mph. Chance of precipitation is 20%.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
73°23°–82°28°
Low, likely
60°16°–66°19°
Typical high / low
78°26° / 54°12°
Wind
13 mph21 km/h, gusts 20 mph33 km/h
UV peak
5
Wednesday, Oct 28. Partly sunny. High 83°28°, low 62°17°. Typical 78°26° / 54°12°. Dry. Mostly agree. Best day outdoors this week.
1. Morning
  6 AM–noon
  Partly sunny, 66°19°
  Dry
2. Afternoon
  noon–6 PM
  Mostly sunny, 82°28°
  Dry
3. Evening
  6 PM–midnight
  Partly cloudy, 73°23°
  Dry
4. Overnight
  midnight–6 AM
  Partly cloudy, 66°19°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: A slight chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 83. Chance of precipitation is 20%.
Night: A slight chance of showers and thunderstorms before 7pm. Partly cloudy, with a low around 62. Chance of precipitation is 20%.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
Best day outdoors this week: the one dry, mild day the forecasts agree on (high 83°28°).
High, likely
79°26°–83°28°
Low, likely
62°17°–66°19°
Typical high / low
78°26° / 54°12°
Wind
12 mph20 km/h, gusts 27 mph43 km/h
UV peak
5
Thursday, Oct 29. Thunderstorms. High 81°27°, low 62°17°. Typical 78°26° / 54°12°. Storms 0.15 in3.8 mm, 40% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 67°19°
  Dry
2. Afternoon
  noon–6 PM
  Drizzle, 82°28°
  40% chance · 0.05 in1.2 mm
3. Evening
  6 PM–midnight
  Cloudy, 76°24°
  40% chance
4. Overnight
  midnight–6 AM
  Cloudy, 67°19°
  30% chance
Hours this far out come from computer models only.
Official NWS forecast
Day: A slight chance of rain showers between 7am and 1pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 81. Chance of precipitation is 40%.
Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 62. Chance of precipitation is 40%.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
77°25°–84°29°
Low, likely
62°17°–67°19°
Typical high / low
78°26° / 54°12°
Wind
12 mph20 km/h, gusts 26 mph41 km/h
UV peak
3
Friday, Oct 30. Drizzle. High 78°26°, low 67°19°. Typical 77°25° / 53°12°. Rain 0.13 in3.3 mm, 50% chance. Forecasts agree.
1. Morning
  6 AM–noon
  Cloudy, 67°20°
  40% chance
2. Afternoon
  noon–6 PM
  Drizzle, 75°24°
  50% chance · 0.03 in0.7 mm
3. Evening
  6 PM–midnight
  Drizzle, 73°23°
  50% chance · 0.02 in0.5 mm
4. Overnight
  midnight–6 AM
  Drizzle, 65°19°
  30% chance · 0.02 in0.6 mm
Hours this far out come from computer models only.
Official NWS forecast
Day: A chance of rain showers. Mostly cloudy, with a high near 78.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
75°24°–78°26°
Low, likely
65°18°–68°20°
Typical high / low
77°25° / 53°12°
Wind
10 mph17 km/h, gusts 24 mph39 km/h
UV peak
4
Saturday, Oct 31. Drizzle. High 82°28°, low 67°19°. Typical 77°25° / 53°12°. Rain 0.15 in3.8 mm, 30% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Drizzle, 68°20°
  30% chance · 0.04 in1 mm
2. Afternoon
  noon–6 PM
  Drizzle, 82°28°
  20% chance · 0.07 in1.9 mm
3. Evening
  6 PM–midnight
  Drizzle, 77°25°
  20% chance · 0.01 in0.3 mm
4. Overnight
  midnight–6 AM
  Cloudy, 72°22°
  Dry
Hours this far out come from computer models only.
The National Weather Service writes about seven days ahead; this day is our model forecast only.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
78°26°–86°30°
Low, likely
63°17°–69°21°
Typical high / low
77°25° / 53°12°
Wind
14 mph23 km/h, gusts 24 mph38 km/h
UV peak
5
Sunday, Nov 1. Drizzle. High 83°28°, low 71°22°. Typical 77°25° / 53°12°. Rain 0.07 in1.8 mm, 20% chance. Mostly agree.
1. Morning
  6 AM–noon
  Partly sunny, 74°23°
  Dry
2. Afternoon
  noon–6 PM
  Partly sunny, 83°28°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 79°26°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 72°22°
  Dry
Hours this far out come from computer models only.
The National Weather Service writes about seven days ahead; this day is our model forecast only.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
81°27°–86°30°
Low, likely
69°21°–72°22°
Typical high / low
77°25° / 53°12°
Wind
14 mph23 km/h, gusts 24 mph38 km/h
UV peak
4
Monday, Nov 2. Showers. High 85°29°, low 69°21°. Typical 76°24° / 52°11°. Rain 0.13 in3.3 mm, 20% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 74°24°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 80°27°
  Dry
3. Evening
  6 PM–midnight
  Showers, 77°25°
  Dry
Hours this far out come from computer models only.
The National Weather Service writes about seven days ahead; this day is our model forecast only.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
78°26°–89°32°
Low, likely
64°18°–73°23°
Typical high / low
76°24° / 52°11°
Wind
11 mph18 km/h, gusts 22 mph35 km/h
UV peak
5

10 days15 days30 days

The outlook

Today
Dry, high 86°, low 60°.
Tomorrow
Dry, high 83°, low 56°, cooling off.
Monday
Dry, high 83°, low 62°.
Rest of week
Highs 78–85°; chance of precipitation on Thursday, Friday.

Want the meteorologists’ reasoning? Read the NWS forecast discussion (EWX) (opens in a new tab)

What changed since yesterday

No meaningful changes from yesterday’s forecast.

Radar

Radar data: NOAA MRMS, rendered by forecast.blue

Radar loads when scrolled into view

Full-screen radar

Rivers

NOAA river gauges within 25 mi

Blanco River at Wimberley

12 mi

Below flood stage

Level: 3.5 ft
Flow: 6 cfs

Forecast peak 3.5 ft Sat 1 AM

Reading from Sat 12 AM · NWS gauge page

Guadalupe River at Sattler

15 mi

Below flood stage

Level: 4.5 ft
Flow: 103 cfs

Forecast peak 4.5 ft Sat 1 AM

Reading from Fri 11:50 PM · NWS gauge page

Guadalupe River above Comal River at New Braunfels

15 mi

Below flood stage

Level: 2.0 ft
Flow: 131 cfs

Forecast peak 2.0 ft Sat 1 AM

Reading from Sat 12 AM · NWS gauge page

San Marcos River at San Marcos

1.1 mi

Level: 3.6 ft
Flow: 95 cfs

Reading from Fri 11:45 PM · NWS gauge page

For your home

What this week’s weather means for heating, cooling, pipes and fresh air.

Cooling this week

About 66% more cooling than a typical week.

This week 16Typical 10

Cooling degree days, base 65°F

Comfort

Comfortable, non-humid air (dew point 56°F).

Open the windows?

Today, 2:00 AM–8:00 AM

Good stretch to open the windows (air quality forecast not available for part of this window).

Is this typical?

SAN MARCOS · official normals 1991–2020 · records 1895–2026

Oct 24, today vs a typical year

Today’s expected high is 6°3° warmer than typical.

Last 7 days vs normal

—SunOct 18
—MonOct 19
—TueOct 20
—WedOct 21
—ThuOct 22
—FriOct 23
—SatOct 24

San Marcos weather by month: normals, records, snow and freeze dates

Sun & moon

Sun

Daylight: 11 h 12 min; Losing 1 min 38 s a day; shortest Dec 21, 59 min less
Golden hour: 6:19–7:06 PM; Morning 7:24–8:12 AM
Blue hour: 7:06–7:16 PM; Morning 7:15–7:24 AM; first light 7:15 AM

Stars tonight? Good

Clear 1:33–7:15 AM; moon 96% lit, sets 6:00 AM.

Moon

Waxing gibbous

95% lit · growing

Today: sets 6:00 AM · rises 5:47 PM
Full moon: Oct 25
New moon: Nov 9

Looking west from San Marcos. The highest point on the skyline is about 1,300 ft, 13 mi away.Skyline from USGS elevation data, heights drawn up to 6× taller. Sky, sun and moon as they are now.

San Marcos, TX weather

Next 2 hours

Next 48 hours

Days ahead

The outlook

Today

Tomorrow

Monday

Rest of week

What changed since yesterday

Radar

Rivers

Blanco River at Wimberley

Guadalupe River at Sattler

Guadalupe River above Comal River at New Braunfels

San Marcos River at San Marcos

For your home

Cooling this week

Comfort

Open the windows?

Is this typical?

Oct 24, today vs a typical year

Last 7 days vs normal

Sun & moon

Sun

Stars tonight? Good

Moon