My Profile
  1. Member Settings
  2. My Devices
  3. Sign Out
Log In
    Favorites
        More Settings
      Elev 4671 ft, 9.532 °S 77.072 °W

      San Marcos, PE

      San Marcos Station39°
      Updated: 8:36 AM GMT-05:00 on September 21, 2026 (GMT -5)
      7 minutes ago
      54°
      30°
      39
      Feels Like 39
      Partly Cloudy
      N
      5
      Similar temperature is expected today
      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 09/21
        High 54°f
         55% Precip. / 0.07 in
        Partly cloudy skies this morning will give way to occasional showers during the afternoon. High 54F. Winds NE at 10 to 15 mph. Chance of rain 60%.
        Tonight
        Mon 09/21
        Low 33°f
         18% Precip. / 0 in
        Overcast. Low 33F. Winds light and variable.
        Tomorrow
        Tue 09/22
        High 52°f32°f
         60% Precip. / 0.09 in
        Cloudy skies during the morning hours followed by scattered showers and thunderstorms in the afternoon. High 52F. Winds NE at 10 to 15 mph. Chance of rain 60%.
        Hourly Forecast
        Now
        40°
        9AM
        42°
        10AM
        46°
        11AM
        49°
        12PM
        51°
        1PM
        52°
        2PM
        51°
        3PM
        55%
        50°
        4PM
        48%
        50°
        5PM
        53%
        47°
        6PM
        33%
        45°
        6:04PM
        Sunset
        7PM
        42°
        8PM
        40°
        9PM
        39°
        10PM
        38°
        11PM
        38°
        12AM
        37°
        1AM
        36°
        2AM
        36°
        3AM
        35°
        4AM
        35°
        5AM
        34°
        5:57AM
        Sunrise
        6AM
        34°
        7AM
        37°
        8AM
        39°
        Precipitation
        55%
        Rain possible after 3 PM
        Pollen
        None
        Air Quality
        78
        Moderate
        UV Index
        5
        Moderate
        Additional Conditions
        1. Pressure 30.04 in
        2. Visibility 10 miles
        3. Clouds Partly Cloudy
        4. Dew Point28°F
        5. Humidity 63%
        6. Rainfall 0.24 in
        7. Snow Depth 0 in
         SPHZ Station History
        Almanac for
        1. Forecast Average Record
        2. Temperature
        3. High 54°F -°F -°F
        4. Low 30°F -°F -°F
        5. Rain/Snow Depth
        6. Precipitation 0.07 in - in -
        7. Snow 0 in - in -
        Almanac for
        1. Forecast Average Record
        2. Temperature
        3. High 52°F -°F -°F
        4. Low 30°F -°F -°F
        Astronomy
        1. Sun Rise Set
        2. Actual Time 5:58 AM 6:04 PM
        3. Civil Twilight 5:37 AM 6:25 PM
        4. Nautical Twilight 5:13 AM 6:49PM
        5. Astronomical Twilight 4:48 AM 7:13 PM
        1. Length of Visible Light 12h 47m
        2. Length of Day 12h 5m
        3. Tomorrow will be 32 seconds longer
        1. Moon 2:05 PM 2:14 AM
        2. Waxing Gibbous76% of the Moon is Illuminated
        Sep 26
        Full Moon
        Oct 3
        Waning Half Last Qtr
        Oct 10
        New Moon
        Oct 18
        Waxing Half First Qtr
        Precipitation
        Loading…
        Health
        Loading…
        Weather Alerts
        Loading…
        Our AppsAbout UsContactCareersWeather Data APIs
        PWS NetworkWundermap
        Terms of UsePrivacy PolicyCookie NoticeAccessibility StatementAdChoicesData Vendors
        essentialaccessibility.com
        We recognize our responsibility to use data and technology for good. We may use or share your data with our data vendors. Take control of your data.
        Review All Privacy and Ad Settings
        Choose how my information is shared
        Data Rights
        The Weather Company The Weather Channel Weather Underground Storm Radar
        © The Weather Company, LLC 2026
        Glossary