10-Day Weather Forecast for San Marcos, Texas 78666 - The Weather Channel | weather.com
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10 Day Weather-

As of 2:55 pm CDT

Today

Sunny Sunny
92°/57°
Rain drop 0%
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Day

92°
Sunny
S 16 mph

Sunny. Near record high temperatures. High 92F. Winds S at 10 to 20 mph.

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  • Humidity
    Humidity22%
  • UV index
    UV Index8 of 11
  • Sunrise
    Sunrise7:32 am
  • Sunset
    Sunset7:44 pm

Night

57°
Mostly Clear Night
Rain drop
20%
S 14 mph

A few passing clouds. Low 57F. Winds S at 10 to 20 mph.

  • Humidity
    Humidity68%
  • UV index
    UV Index0 of 11
  • Moonrise
    Moonrise9:39 am
  • Moonset
    Moonset--
  • Moon Phase - Day 4 Waxing Crescent

Mon 23

Partly Cloudy Day Partly Cloudy
88°/60°
Rain drop 17%
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Day

88°
Partly Cloudy Day
Rain drop
17%
SSE 8 mph

Some clouds in the morning will give way to mainly sunny skies for the afternoon. Very warm. High 88F. Winds SSE at 5 to 10 mph.

  • Humidity
    Humidity60%
  • UV index
    UV Index8 of 11
  • Sunrise
    Sunrise7:31 am
  • Sunset
    Sunset7:44 pm

Night

60°
Mostly Clear Night
Rain drop
21%
S 9 mph

Mainly clear skies. Low around 60F. Winds S at 5 to 10 mph.

  • Humidity
    Humidity66%
  • UV index
    UV Index0 of 11
  • Moonrise
    Moonrise10:28 am
  • Moonset
    Moonset12:08 am
  • Moon Phase - Day 5 Waxing Crescent

Tue 24

Partly Cloudy Day AM Clouds/PM Sun
88°/65°
Rain drop 20%
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Day

88°
Partly Cloudy Day
Rain drop
20%
S 12 mph

Morning clouds will give way to sunshine for the afternoon. High 88F. Winds S at 10 to 15 mph.

  • Humidity
    Humidity59%
  • UV index
    UV Index9 of 11
  • Sunrise
    Sunrise7:30 am
  • Sunset
    Sunset7:45 pm

Night

65°
Partly Cloudy Night
Rain drop
23%
SSE 13 mph

Clear skies early will become overcast later during the night. Low near 65F. Winds SSE at 10 to 20 mph.

  • Humidity
    Humidity71%
  • UV index
    UV Index0 of 11
  • Moonrise
    Moonrise11:23 am
  • Moonset
    Moonset1:18 am
  • Moon Phase - Day 6 Waxing Crescent

Wed 25

Partly Cloudy Day AM Clouds/PM Sun
90°/64°
Rain drop 22%
Add

Day

90°
Partly Cloudy Day
Rain drop
22%
S 13 mph

Morning clouds will give way to sunshine for the afternoon. High near 90F. Winds S at 10 to 20 mph.

  • Humidity
    Humidity57%
  • UV index
    UV Index9 of 11
  • Sunrise
    Sunrise7:29 am
  • Sunset
    Sunset7:46 pm

Night

64°
Mostly Clear Night
Rain drop
20%
S 14 mph

Partly cloudy. Low 64F. Winds S at 10 to 20 mph.

  • Humidity
    Humidity71%
  • UV index
    UV Index0 of 11
  • Moonrise
    Moonrise12:27 pm
  • Moonset
    Moonset2:24 am
  • Moon Phase - Day 7 First Quarter

Thu 26

Partly Cloudy Day AM Clouds/PM Sun
90°/63°
Rain drop 20%
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Day

90°
Partly Cloudy Day
Rain drop
20%
S 16 mph

Morning clouds will give way to sunshine for the afternoon. High around 90F. Winds S at 10 to 20 mph.

  • Humidity
    Humidity55%
  • UV index
    UV Index9 of 11
  • Sunrise
    Sunrise7:27 am
  • Sunset
    Sunset7:46 pm

Night

63°
Partly Cloudy Night
Rain drop
20%
S 17 mph

Clear during the evening followed by cloudy skies overnight. Low 63F. Winds S at 10 to 20 mph.

  • Humidity
    Humidity70%
  • UV index
    UV Index0 of 11
  • Moonrise
    Moonrise1:33 pm
  • Moonset
    Moonset3:21 am
  • Moon Phase - Day 8 Waxing Gibbous

Fri 27

Mostly Clear Day Mostly Sunny
89°/57°
Rain drop 20%
Add

Day

89°
Mostly Clear Day
Rain drop
20%
SSE 12 mph

Sunshine along with some cloudy intervals. High 89F. Winds SSE at 10 to 15 mph.

  • Humidity
    Humidity55%
  • UV index
    UV Index9 of 11
  • Sunrise
    Sunrise7:26 am
  • Sunset
    Sunset7:47 pm

Night

57°
Mostly Clear Night
Rain drop
8%
NE 15 mph

Mainly clear skies. Low 57F. Winds NE at 10 to 20 mph.

  • Humidity
    Humidity61%
  • UV index
    UV Index0 of 11
  • Moonrise
    Moonrise2:41 pm
  • Moonset
    Moonset4:11 am
  • Moon Phase - Day 9 Waxing Gibbous

Sat 28

Partly Cloudy Day Partly Cloudy
80°/55°
Rain drop 4%
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Day

80°
Partly Cloudy Day
Rain drop
4%
NNE 12 mph

Partly cloudy skies. High near 80F. Winds NNE at 10 to 15 mph.

  • Humidity
    Humidity53%
  • UV index
    UV Index8 of 11
  • Sunrise
    Sunrise7:25 am
  • Sunset
    Sunset7:47 pm

Night

55°
Partly Cloudy Night
Rain drop
7%
NE 13 mph

Partly cloudy. Low near 55F. Winds NE at 10 to 15 mph.

  • Humidity
    Humidity53%
  • UV index
    UV Index0 of 11
  • Moonrise
    Moonrise3:47 pm
  • Moonset
    Moonset4:53 am
  • Moon Phase - Day 10 Waxing Gibbous

Sun 29

Mostly Clear Day Mostly Sunny
85°/57°
Rain drop 3%
Add

Day

85°
Mostly Clear Day
Rain drop
3%
SE 12 mph

A few clouds early, otherwise mostly sunny. High around 85F. Winds SE at 10 to 15 mph.

  • Humidity
    Humidity45%
  • UV index
    UV Index9 of 11
  • Sunrise
    Sunrise7:24 am
  • Sunset
    Sunset7:48 pm

Night

57°
Partly Cloudy Night
Rain drop
20%
SSE 13 mph

A few clouds from time to time. Low 57F. Winds SSE at 10 to 15 mph.

  • Humidity
    Humidity61%
  • UV index
    UV Index0 of 11
  • Moonrise
    Moonrise4:50 pm
  • Moonset
    Moonset5:28 am
  • Moon Phase - Day 11 Waxing Gibbous

Mon 30

Partly Cloudy Day Partly Cloudy
85°/63°
Rain drop 24%
Add

Day

85°
Partly Cloudy Day
Rain drop
24%
SSE 15 mph

Partly to mostly cloudy. High around 85F. Winds SSE at 10 to 20 mph.

  • Humidity
    Humidity56%
  • UV index
    UV Index9 of 11
  • Sunrise
    Sunrise7:23 am
  • Sunset
    Sunset7:49 pm

Night

63°
Mostly Cloudy Night
Rain drop
24%
SSE 16 mph

Partly cloudy skies early will become overcast later during the night. Low 63F. Winds SSE at 10 to 20 mph.

  • Humidity
    Humidity70%
  • UV index
    UV Index0 of 11
  • Moonrise
    Moonrise5:50 pm
  • Moonset
    Moonset6:00 am
  • Moon Phase - Day 12 Waxing Gibbous

Tue 31

Scattered Showers Day AM Showers
85°/63°
Rain drop 34%
Add

Day

85°
Scattered Showers Day
Rain drop
34%
S 17 mph

A few showers early with mostly cloudy conditions later in the day. High around 85F. Winds S at 10 to 20 mph. Chance of rain 30%.

  • Humidity
    Humidity57%
  • UV index
    UV Index6 of 11
  • Sunrise
    Sunrise7:21 am
  • Sunset
    Sunset7:49 pm

Night

63°
Thunderstorms
Rain drop
53%
SSE 17 mph

Partly to mostly cloudy with scattered showers and thunderstorms developing late at night. Low 63F. Winds SSE at 10 to 20 mph. Chance of rain 50%.

  • Humidity
    Humidity73%
  • UV index
    UV Index0 of 11
  • Moonrise
    Moonrise6:48 pm
  • Moonset
    Moonset6:29 am
  • Moon Phase - Day 13 Waxing Gibbous

Wed 01

Scattered Thunderstorms Scattered Thunderstorms
84°/62°
Rain drop 59%
Add

Day

84°
Scattered Thunderstorms
Rain drop
59%
S 16 mph

Mixed clouds and sun with scattered thunderstorms. High 84F. Winds S at 10 to 20 mph. Chance of rain 60%.

  • Humidity
    Humidity61%
  • UV index
    UV Index6 of 11
  • Sunrise
    Sunrise7:20 am
  • Sunset
    Sunset7:50 pm

Night

62°
Scattered Thunderstorms Night
Rain drop
59%
SSE 16 mph

Scattered showers and thunderstorms. Low 62F. Winds SSE at 10 to 20 mph. Chance of rain 60%.

  • Humidity
    Humidity74%
  • UV index
    UV Index0 of 11
  • Moonrise
    Moonrise7:45 pm
  • Moonset
    Moonset6:56 am
  • Moon Phase - Day 14 Full Moon

Thu 02

Scattered Thunderstorms Scattered Thunderstorms
84°/61°
Rain drop 56%
Add

Day

84°
Scattered Thunderstorms
Rain drop
56%
S 13 mph

Mixed clouds and sun with scattered thunderstorms. High 84F. Winds S at 10 to 15 mph. Chance of rain 60%.

  • Humidity
    Humidity62%
  • UV index
    UV Index6 of 11
  • Sunrise
    Sunrise7:19 am
  • Sunset
    Sunset7:50 pm

Night

61°
Scattered Thunderstorms Night
Rain drop
39%
SSE 13 mph

Scattered thunderstorms in the evening, then variable clouds overnight with more showers at times. Low 61F. Winds SSE at 10 to 20 mph. Chance of rain 40%.

  • Humidity
    Humidity75%
  • UV index
    UV Index0 of 11
  • Moonrise
    Moonrise8:43 pm
  • Moonset
    Moonset7:24 am
  • Moon Phase - Day 15 Full Moon

Fri 03

Scattered Thunderstorms Scattered Thunderstorms
83°/62°
Rain drop 42%
Add

Day

83°
Scattered Thunderstorms
Rain drop
42%
S 14 mph

Scattered showers and thunderstorms, especially early in the day. High 83F. Winds S at 10 to 20 mph. Chance of rain 40%.

  • Humidity
    Humidity64%
  • UV index
    UV Index6 of 11
  • Sunrise
    Sunrise7:18 am
  • Sunset
    Sunset7:51 pm

Night

62°
Showers
Rain drop
46%
SSE 15 mph

Cloudy with occasional showers. Low 62F. Winds SSE at 10 to 20 mph. Chance of rain 50%.

  • Humidity
    Humidity76%
  • UV index
    UV Index0 of 11
  • Moonrise
    Moonrise9:40 pm
  • Moonset
    Moonset7:54 am
  • Moon Phase - Day 16 Waning Gibbous

Sat 04

Scattered Thunderstorms Scattered Thunderstorms
84°/61°
Rain drop 54%
Add

Day

84°
Scattered Thunderstorms
Rain drop
54%
S 13 mph

Variable clouds with scattered thunderstorms. High 84F. Winds S at 10 to 20 mph. Chance of rain 50%.

  • Humidity
    Humidity63%
  • UV index
    UV Index7 of 11
  • Sunrise
    Sunrise7:17 am
  • Sunset
    Sunset7:52 pm

Night

61°
Scattered Thunderstorms Night
Rain drop
59%
SSE 12 mph

Scattered thunderstorms in the evening, then variable clouds overnight with more showers at times. Low 61F. Winds SSE at 10 to 15 mph. Chance of rain 60%.

  • Humidity
    Humidity74%
  • UV index
    UV Index0 of 11
  • Moonrise
    Moonrise10:38 pm
  • Moonset
    Moonset8:27 am
  • Moon Phase - Day 17 Waning Gibbous

Sun 05

Scattered Thunderstorms Scattered Thunderstorms
80°/58°
Rain drop 59%
Add

Day

80°
Scattered Thunderstorms
Rain drop
59%
SSE 13 mph

Scattered showers and thunderstorms. High near 80F. Winds SSE at 10 to 20 mph. Chance of rain 60%.

  • Humidity
    Humidity66%
  • UV index
    UV Index7 of 11
  • Sunrise
    Sunrise7:15 am
  • Sunset
    Sunset7:52 pm

Night

58°
Showers
Rain drop
38%
E 12 mph

Cloudy with occasional rain showers. Low 58F. ESE winds shifting to NW at 10 to 15 mph. Chance of rain 40%.

  • Humidity
    Humidity74%
  • UV index
    UV Index0 of 11
  • Moonrise
    Moonrise11:36 pm
  • Moonset
    Moonset9:03 am
  • Moon Phase - Day 18 Waning Gibbous
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