San Marcos, TX Air Quality & Pollen

Tonight

Wed 09/30

Low 76°f

23% Precip. / 0 in

Partly cloudy skies this evening will become overcast overnight. Low 76F. Winds SE at 10 to 20 mph.

Tomorrow

Thu 10/01

High 96°f

24% Precip. / 0 in

Cloudy skies early will become partly cloudy later in the day. High 96F. Winds SSE at 10 to 20 mph.

Tomorrow night

Thu 10/01

Low 76°f

58% Precip. / 0.17 in

Partly cloudy skies early will give way to occasional showers later during the night. Low 76F. Winds SSE at 10 to 20 mph. Chance of rain 60%.

Hourly Forecast

Now

90°

7:19PM

Sunset

8PM

87°

9PM

85°

10PM

83°

11PM

82°

12AM

80°

1AM

79°

2AM

79°

3AM

78°

4AM

78°

5AM

77°

6AM

77°

7AM

77°

7:24AM

Sunrise

8AM

77°

9AM

36%

80°

10AM

84°

11AM

86°

12PM

90°

1PM

92°

2PM

93°

3PM

94°

4PM

93°

5PM

91°

6PM

90°

7PM

88°

Additional Conditions

Pressure 29.74 in
Visibility 10 miles
Clouds Partly Cloudy
Dew Point70°F
Humidity 52%
Rainfall 0 in
Snow Depth 0 in

KHYI Station History

Almanac for September 29, 2026

Forecast Average Record
Temperature
High 96°F 87°F 103°F 2005
Low 73°F 64°F 42°F 1967
Rain/Snow Depth
Precipitation 0 in 2.9 in -
Snow 0 in 0 in -

Almanac for September 30, 2026

Forecast Average Record
Temperature
High 96°F 87°F 99°F
Low 76°F 64°F 42°F

Astronomy

Sun Rise Set
Actual Time 7:24 AM 7:19 PM
Civil Twilight 7:00 AM 7:43 PM
Nautical Twilight 6:32 AM 8:10PM
Astronomical Twilight 6:04 AM 8:38 PM

Length of Visible Light 12h 43m
Length of Day 11h 55m
Tomorrow will be 1 minute 47 seconds shorter

Moon 9:09 PM 10:30 AM
Waning Gibbous85% of the Moon is Illuminated

Oct 3

Waning Half Last Qtr

Oct 10

New Moon

Oct 18

Waxing Half First Qtr

Oct 25

Full Moon

Nearby Weather Stations

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