My Profile
  1. Member Settings
  2. My Devices
  3. Sign Out
Log In
    Favorites
        More Settings
      Elev 560 ft, 29.893 °N 97.931 °W

      San Marcos, TX

      San Marcos Station89°
      Updated: 12:08 PM CDT on September 27, 2026 (GMT -5)
      3 minutes ago
      97°
      69°
      89
      Feels Like 96
      Sunny
      N
      4
      Higher temperature is expected today
      Wundermap
      50
      50
      575
      90
      50
      7
      0 mph
      50
      50
      50
      50
      50
      50
      Radar · Now
        Hyper-local data from Weather Underground's network of
        400,000+ personal weather stations worldwide
        Today
        Mon 09/28
        High 97°f
         1% Precip. / 0 in
        Sun and clouds mixed. High 97F. Winds light and variable.
        Tonight
        Mon 09/28
        Low 71°f
         6% Precip. / 0 in
        Cloudy skies early, followed by partial clearing. Low 71F. Winds SSE at 5 to 10 mph.
        Tomorrow
        Tue 09/29
        High 96°f73°f
         15% Precip. / 0 in
        Intervals of clouds and sunshine. A stray shower or thunderstorm is possible. High 96F. Winds SSE at 5 to 10 mph.
        Hourly Forecast
        Now
        92°
        1PM
        93°
        2PM
        95°
        3PM
        97°
        4PM
        96°
        5PM
        95°
        6PM
        95°
        7PM
        92°
        7:21PM
        Sunset
        8PM
        88°
        9PM
        85°
        10PM
        84°
        11PM
        82°
        12AM
        80°
        1AM
        78°
        2AM
        77°
        3AM
        76°
        4AM
        75°
        5AM
        74°
        6AM
        73°
        7AM
        72°
        7:23AM
        Sunrise
        8AM
        73°
        9AM
        78°
        10AM
        82°
        11AM
        86°
        12PM
        89°
        Precipitation
        10%
        Pollen
        None
        Air Quality
        65
        Moderate
        UV Index
        8
        Very High
        Additional Conditions
        1. Pressure 29.92 in
        2. Visibility 10 miles
        3. Clouds Clear
        4. Dew Point68°F
        5. Humidity 47%
        6. Rainfall 0 in
        7. Snow Depth 0 in
         KHYI Station History
        Almanac for September 27, 2026
        1. Forecast Average Record
        2. Temperature
        3. High 97°F 88°F 101°F 2011
        4. Low 69°F 65°F 42°F 1942
        5. Rain/Snow Depth
        6. Precipitation 0 in 2.9 in -
        7. Snow 0 in 0 in -
        Almanac for September 28, 2026
        1. Forecast Average Record
        2. Temperature
        3. High 96°F 87°F 101°F
        4. Low 69°F 65°F 39°F
        Astronomy
        1. Sun Rise Set
        2. Actual Time 7:22 AM 7:21 PM
        3. Civil Twilight 6:59 AM 7:45 PM
        4. Nautical Twilight 6:31 AM 8:13PM
        5. Astronomical Twilight 6:03 AM 8:41 PM
        1. Length of Visible Light 12h 46m
        2. Length of Day 11h 59m
        3. Tomorrow will be 1 minute 47 seconds shorter
        1. Moon 7:51 PM 8:18 AM
        2. Waning Gibbous97% 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
        Station Location
        Temp
        Windchill
        Heat Index
        Dew Point
        Humidity
        Wind
        Precip.
        Elev.
        Updated
        Loading nearby stations…
        Precipitation
        Loading…
        Health
        Loading…
        Weather Alerts
        Loading…
        Our AppsAbout UsContactCareers
        PWS NetworkWunderMap
        Trust CenterTerms of UsePrivacy PolicyData RightsPrivacy SettingsCookie NoticeData VendorsAccessibility Statement
        Level Access
        The Weather Company The Weather Channel Weather Underground Storm Radar
        © The Weather Company, LLC 2026
        Glossary