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      Elev 4671 ft, 9.532 °S 77.072 °W

      San Marcos, PE

      San Marcos Station38°
      Updated: 7:08 AM GMT-05:00 on September 21, 2026 (GMT -5)
      1 minute ago
      55°
      31°
      38
      Feels Like 38
      Partly Cloudy
      N
      3
      Same 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 55°f
         59% Precip. / 0.07 in
        Partly cloudy this morning. Increasing clouds with periods of showers this afternoon. High near 55F. Winds NE at 10 to 15 mph. Chance of rain 60%.
        Tonight
        Mon 09/21
        Low 34°f
         16% Precip. / 0 in
        Cloudy. Low 34F. Winds light and variable.
        Tomorrow
        Tue 09/22
        High 53°f32°f
         54% Precip. / 0.08 in
        Scattered thunderstorms developing during the afternoon. High 53F. Winds NE at 10 to 15 mph. Chance of rain 50%.
        Hourly Forecast
        Now
        32°
        8AM
        37°
        9AM
        42°
        10AM
        46°
        11AM
        49°
        12PM
        51°
        1PM
        52°
        2PM
        36%
        52°
        3PM
        48%
        53°
        4PM
        59%
        51°
        5PM
        44%
        48°
        6PM
        45°
        6:04PM
        Sunset
        7PM
        43°
        8PM
        41°
        9PM
        39°
        10PM
        39°
        11PM
        38°
        12AM
        38°
        1AM
        37°
        2AM
        36°
        3AM
        36°
        4AM
        36°
        5AM
        35°
        5:57AM
        Sunrise
        6AM
        35°
        7AM
        37°
        Precipitation
        59%
        Pollen
        None
        Air Quality
        78
        Moderate
        UV Index
        1
        Low
        Additional Conditions
        1. Pressure 30.08 in
        2. Visibility 10 miles
        3. Clouds Partly Cloudy
        4. Dew Point28°F
        5. Humidity 82%
        6. Rainfall 0.24 in
        7. Snow Depth 0 in
         SPHZ Station History
        Almanac for
        1. Forecast Average Record
        2. Temperature
        3. High 55°F -°F -°F
        4. Low 31°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 53°F -°F -°F
        4. Low 31°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
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