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

As of 12:02 am CDT

Tonight

Mostly Cloudy Night Mostly Cloudy
--/66°
Rain drop 22%
Subtract

Night

66°
Mostly Cloudy Night
Rain drop
22%
S 11 mph

Partly cloudy this evening, then becoming cloudy after midnight. Low 66F. Winds S at 10 to 15 mph.

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Breaking Down Thursday’s Storm Threat


  • Humidity
    Humidity88%
  • 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°/65°
Rain drop 22%
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Day

90°
Partly Cloudy Day
Rain drop
22%
S 16 mph

Cloudy early, becoming mostly sunny in the afternoon. Near record high temperatures. High near 90F. Winds S at 10 to 20 mph.

  • Humidity
    Humidity58%
  • UV index
    UV Index9 of 11
  • Sunrise
    Sunrise7:28 am
  • Sunset
    Sunset7:46 pm

Night

65°
Partly Cloudy Night
Rain drop
24%
S 17 mph

Clear skies in the evening then becoming cloudy overnight. Low near 65F. Winds S at 10 to 20 mph.

  • Humidity
    Humidity72%
  • UV index
    UV Index0 of 11
  • Moonrise
    Moonrise1:33 pm
  • Moonset
    Moonset3:21 am
  • Moon Phase - Day 8 Waxing Gibbous

Fri 27

Partly Cloudy Day AM Clouds/PM Sun
86°/54°
Rain drop 19%
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Day

86°
Partly Cloudy Day
Rain drop
19%
SSE 14 mph

Cloudy skies early, then partly cloudy in the afternoon. High 86F. Winds SSE at 10 to 20 mph.

  • Humidity
    Humidity60%
  • UV index
    UV Index9 of 11
  • Sunrise
    Sunrise7:26 am
  • Sunset
    Sunset7:47 pm

Night

54°
Partly Cloudy Night
Rain drop
17%
NNE 16 mph

Partly cloudy skies. Low 54F. Winds NNE at 10 to 20 mph.

  • Humidity
    Humidity65%
  • 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
71°/52°
Rain drop 11%
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Day

71°
Partly Cloudy Day
Rain drop
11%
NNE 14 mph

Considerable clouds early. Some decrease in clouds later in the day. High 71F. Winds NNE at 10 to 20 mph.

  • Humidity
    Humidity57%
  • UV index
    UV Index9 of 11
  • Sunrise
    Sunrise7:25 am
  • Sunset
    Sunset7:48 pm

Night

52°
Partly Cloudy Night
Rain drop
8%
ESE 9 mph

Clear to partly cloudy. Low 52F. Winds ESE at 5 to 10 mph.

  • Humidity
    Humidity63%
  • UV index
    UV Index0 of 11
  • Moonrise
    Moonrise3:47 pm
  • Moonset
    Moonset4:53 am
  • Moon Phase - Day 10 Waxing Gibbous

Sun 29

Partly Cloudy Day Partly Cloudy
82°/63°
Rain drop 8%
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Day

82°
Partly Cloudy Day
Rain drop
8%
S 12 mph

Intervals of clouds and sunshine. High 82F. Winds S at 10 to 15 mph.

  • Humidity
    Humidity63%
  • UV index
    UV Index9 of 11
  • Sunrise
    Sunrise7:24 am
  • Sunset
    Sunset7:48 pm

Night

63°
Partly Cloudy Night
Rain drop
11%
SSE 14 mph

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

  • Humidity
    Humidity73%
  • 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
88°/65°
Rain drop 10%
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Day

88°
Partly Cloudy Day
Rain drop
10%
S 16 mph

Intervals of clouds and sunshine. High 88F. Winds S at 10 to 20 mph.

  • Humidity
    Humidity55%
  • UV index
    UV Index9 of 11
  • Sunrise
    Sunrise7:23 am
  • Sunset
    Sunset7:49 pm

Night

65°
Mostly Cloudy Night
Rain drop
20%
SSE 18 mph

Partly cloudy during the evening followed by cloudy skies overnight. Low near 65F. Winds SSE at 15 to 25 mph.

  • Humidity
    Humidity72%
  • UV index
    UV Index0 of 11
  • Moonrise
    Moonrise5:50 pm
  • Moonset
    Moonset6:00 am
  • Moon Phase - Day 12 Waxing Gibbous

Tue 31

Partly Cloudy Day AM Clouds/PM Sun
89°/66°
Rain drop 24%
Add

Day

89°
Partly Cloudy Day
Rain drop
24%
S 18 mph

Cloudy skies early will become partly cloudy later in the day. High 89F. Winds S at 15 to 25 mph.

  • Humidity
    Humidity58%
  • UV index
    UV Index9 of 11
  • Sunrise
    Sunrise7:22 am
  • Sunset
    Sunset7:49 pm

Night

66°
Mostly Cloudy Night
Rain drop
14%
SSE 18 mph

Partly cloudy skies early will become overcast later during the night. Low 66F. Winds SSE at 15 to 25 mph.

  • Humidity
    Humidity72%
  • UV index
    UV Index0 of 11
  • Moonrise
    Moonrise6:49 pm
  • Moonset
    Moonset6:29 am
  • Moon Phase - Day 13 Waxing Gibbous

Wed 01

Partly Cloudy Day AM Clouds/PM Sun
91°/66°
Rain drop 21%
Add

Day

91°
Partly Cloudy Day
Rain drop
21%
S 18 mph

Cloudy early with partial sunshine expected late. High 91F. Winds S at 15 to 25 mph.

  • Humidity
    Humidity56%
  • UV index
    UV Index9 of 11
  • Sunrise
    Sunrise7:20 am
  • Sunset
    Sunset7:50 pm

Night

66°
Scattered Showers Night
Rain drop
46%
SSE 19 mph

Partly cloudy skies early will give way to occasional showers later during the night. Low 66F. Winds SSE at 15 to 25 mph. Chance of rain 50%.

  • Humidity
    Humidity71%
  • UV index
    UV Index0 of 11
  • Moonrise
    Moonrise7:45 pm
  • Moonset
    Moonset6:57 am
  • Moon Phase - Day 14 Full Moon

Thu 02

Scattered Showers Day AM Showers
82°/59°
Rain drop 42%
Add

Day

82°
Scattered Showers Day
Rain drop
42%
S 13 mph

Showers in the morning with some clearing in the afternoon. High 82F. Winds S at 10 to 15 mph. Chance of rain 40%.

  • Humidity
    Humidity64%
  • UV index
    UV Index6 of 11
  • Sunrise
    Sunrise7:19 am
  • Sunset
    Sunset7:51 pm

Night

59°
Scattered Thunderstorms Night
Rain drop
33%
SSE 13 mph

Isolated thunderstorms in the evening, mainly cloudy overnight with a few showers. Low 59F. Winds SSE at 10 to 20 mph. Chance of rain 30%.

  • Humidity
    Humidity73%
  • UV index
    UV Index0 of 11
  • Moonrise
    Moonrise8:43 pm
  • Moonset
    Moonset7:24 am
  • Moon Phase - Day 15 Full Moon

Fri 03

Partly Cloudy Day AM Clouds/PM Sun
86°/63°
Rain drop 24%
Add

Day

86°
Partly Cloudy Day
Rain drop
24%
SSE 16 mph

Cloudy skies early will become partly cloudy later in the day. High 86F. Winds SSE at 10 to 20 mph.

  • Humidity
    Humidity52%
  • UV index
    UV Index9 of 11
  • Sunrise
    Sunrise7:18 am
  • Sunset
    Sunset7:51 pm

Night

63°
Scattered Showers Night
Rain drop
32%
SSE 17 mph

Partly cloudy during the evening. A few showers developing later during the night. Low 63F. Winds SSE at 10 to 20 mph. Chance of rain 30%.

  • Humidity
    Humidity65%
  • UV index
    UV Index0 of 11
  • Moonrise
    Moonrise9:40 pm
  • Moonset
    Moonset7:54 am
  • Moon Phase - Day 16 Waning Gibbous

Sat 04

Partly Cloudy Day Partly Cloudy
87°/61°
Rain drop 24%
Add

Day

87°
Partly Cloudy Day
Rain drop
24%
SSE 14 mph

Partly cloudy skies. High 87F. Winds SSE at 10 to 20 mph.

  • Humidity
    Humidity55%
  • UV index
    UV Index8 of 11
  • Sunrise
    Sunrise7:17 am
  • Sunset
    Sunset7:52 pm

Night

61°
Showers
Rain drop
50%
SE 15 mph

Cloudy with occasional rain showers. Low 61F. Winds SE at 10 to 20 mph. Chance of rain 50%.

  • Humidity
    Humidity68%
  • UV index
    UV Index0 of 11
  • Moonrise
    Moonrise10:38 pm
  • Moonset
    Moonset8:27 am
  • Moon Phase - Day 17 Waning Gibbous

Sun 05

Showers Showers
85°/58°
Rain drop 52%
Add

Day

85°
Showers
Rain drop
52%
SSE 14 mph

Showers early becoming less numerous later in the day. High around 85F. Winds SSE at 10 to 20 mph. Chance of rain 50%.

  • Humidity
    Humidity56%
  • UV index
    UV Index8 of 11
  • Sunrise
    Sunrise7:16 am
  • Sunset
    Sunset7:52 pm

Night

58°
Showers
Rain drop
56%
SE 14 mph

Overcast with rain showers at times. Low 58F. Winds SE at 10 to 20 mph. Chance of rain 60%.

  • Humidity
    Humidity70%
  • UV index
    UV Index0 of 11
  • Moonrise
    Moonrise11:36 pm
  • Moonset
    Moonset9:03 am
  • Moon Phase - Day 18 Waning Gibbous

Mon 06

Showers Showers
80°/57°
Rain drop 56%
Add

Day

80°
Showers
Rain drop
56%
SSE 14 mph

Considerable cloudiness with occasional rain showers. High near 80F. Winds SSE at 10 to 20 mph. Chance of rain 60%.

  • Humidity
    Humidity61%
  • UV index
    UV Index8 of 11
  • Sunrise
    Sunrise7:14 am
  • Sunset
    Sunset7:53 pm

Night

57°
Showers
Rain drop
45%
SE 14 mph

Cloudy with occasional rain showers. Low 57F. Winds SE at 10 to 20 mph. Chance of rain 50%.

  • Humidity
    Humidity78%
  • UV index
    UV Index0 of 11
  • Moonrise
    Moonrise--
  • Moonset
    Moonset9:44 am
  • Moon Phase - Day 19 Waning Gibbous

Tue 07

Scattered Thunderstorms Scattered Thunderstorms
80°/60°
Rain drop 49%
Add

Day

80°
Scattered Thunderstorms
Rain drop
49%
SSE 12 mph

Rain showers in the morning with scattered thunderstorms arriving in the afternoon. High near 80F. Winds SSE at 10 to 15 mph. Chance of rain 50%.

  • Humidity
    Humidity65%
  • UV index
    UV Index8 of 11
  • Sunrise
    Sunrise7:13 am
  • Sunset
    Sunset7:54 pm

Night

60°
Showers
Rain drop
42%
SSE 13 mph

Cloudy with showers. Low around 60F. Winds SSE at 10 to 15 mph. Chance of rain 40%.

  • Humidity
    Humidity72%
  • UV index
    UV Index0 of 11
  • Moonrise
    Moonrise12:33 am
  • Moonset
    Moonset10:30 am
  • Moon Phase - Day 20 Waning Gibbous

Wed 08

Showers Showers
82°/59°
Rain drop 45%
Add

Day

82°
Showers
Rain drop
45%
SSE 12 mph

Cloudy with occasional rain showers. High 82F. Winds SSE at 10 to 15 mph. Chance of rain 50%.

  • Humidity
    Humidity61%
  • UV index
    UV Index6 of 11
  • Sunrise
    Sunrise7:12 am
  • Sunset
    Sunset7:54 pm

Night

59°
Showers
Rain drop
42%
E 13 mph

Cloudy with showers. Low 59F. Winds E at 10 to 15 mph. Chance of rain 40%.

  • Humidity
    Humidity66%
  • UV index
    UV Index0 of 11
  • Moonrise
    Moonrise1:26 am
  • Moonset
    Moonset11:21 am
  • Moon Phase - Day 21 Waning Gibbous
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