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      Elev 1432 ft, 14.973 °N 91.896 °W

      San Marcos, GT

      Sun, Oct 18, 2026
      Sunday
      Sun 10/18
      High 80°f
      66% Precip. / 0.45 in
      Rain showers in the morning with thunderstorms developing in the afternoon. High near 80F. Winds light and variable. Chance of rain 70%.
      Sunday night
      Sun 10/18
      Low 67°f
      63% Precip. / 0.19 in
      Rain early...then remaining cloudy with showers late. Low 67F. Winds light and variable. Chance of rain 60%.
      Sunrise 5:59 AM
      Sunset 5:45 PM
      Moonrise 12:42 PM
      Moonset -
      First Quarter, 51% visible
      Hourly Forecast
      12AM
      47%
      70°
      1AM
      46%
      69°
      2AM
      45%
      69°
      3AM
      39%
      68°
      4AM
      38%
      68°
      5AM
      38%
      68°
      5:59AM
      Sunrise
      6AM
      34%
      68°
      7AM
      41%
      69°
      8AM
      44%
      72°
      9AM
      54%
      76°
      10AM
      57%
      78°
      11AM
      58%
      79°
      12PM
      66%
      80°
      1PM
      66%
      80°
      2PM
      66%
      79°
      3PM
      65%
      78°
      4PM
      65%
      76°
      5PM
      64%
      75°
      5:45PM
      Sunset
      6PM
      64%
      73°
      7PM
      64%
      72°
      8PM
      63%
      71°
      9PM
      63%
      70°
      10PM
      62%
      70°
      11PM
      62%
      70°
      Time Conditions Temp. Feels Like Precip Amount Cloud Cover Dew Point Humidity Wind Pressure
      12:00 am
      Showers
      70°F 72°F 47% 0.01in 86% 67°F 90% 1 mph NE 29.96in
      1:00 am
      Showers
      69°F 71°F 46% 0.01in 86% 66°F 90% 1 mph NNW 29.95in
      2:00 am
      Showers
      69°F 71°F 45% 0.01in 85% 66°F 89% 1 mph ENE 29.95in
      3:00 am
      Showers
      68°F 70°F 39% 0.01in 85% 65°F 90% 2 mph NE 29.94in
      4:00 am
      Showers
      68°F 70°F 38% 0.01in 85% 65°F 90% 2 mph NE 29.94in
      5:00 am
      Showers
      68°F 70°F 38% 0.01in 84% 65°F 90% 2 mph NE 29.94in
      6:00 am
      Few Showers
      68°F 70°F 34% 0.01in 83% 65°F 90% 2 mph NE 29.94in
      7:00 am
      Showers
      69°F 70°F 41% 0.01in 81% 66°F 90% 1 mph NE 29.95in
      8:00 am
      Showers
      72°F 74°F 44% 0.01in 79% 67°F 84% 1 mph NNE 29.95in
      9:00 am
      Showers
      76°F 79°F 54% 0.02in 78% 68°F 77% 1 mph NNE 29.96in
      10:00 am
      Showers
      78°F 82°F 57% 0.02in 78% 69°F 73% 2 mph N 29.95in
      11:00 am
      Showers
      79°F 83°F 58% 0.02in 79% 69°F 72% 2 mph WSW 29.95in
      12:00 pm
      Thunderstorms
      80°F 84°F 66% 0.07in 90% 70°F 72% 3 mph WSW 29.94in
      1:00 pm
      Thunderstorms
      80°F 84°F 66% 0.07in 92% 70°F 72% 5 mph WSW 29.93in
      2:00 pm
      Thunderstorms
      79°F 84°F 66% 0.06in 96% 70°F 73% 5 mph SW 29.92in
      3:00 pm
      Thunderstorms
      78°F 82°F 65% 0.06in 89% 70°F 76% 6 mph SW 29.91in
      4:00 pm
      Thunderstorms
      76°F 80°F 65% 0.05in 90% 69°F 79% 4 mph WSW 29.9in
      5:00 pm
      Thunderstorms
      75°F 77°F 64% 0.04in 90% 69°F 83% 3 mph W 29.91in
      6:00 pm
      Thunderstorms
      73°F 75°F 64% 0.03in 89% 69°F 88% 2 mph NNE 29.92in
      7:00 pm
      Thunderstorms
      72°F 74°F 64% 0.03in 88% 69°F 90% 1 mph NNE 29.93in
      8:00 pm
      Rain
      71°F 73°F 63% 0.02in 100% 68°F 90% 1 mph NNE 29.95in
      9:00 pm
      Light Rain
      70°F 72°F 63% 0.02in 86% 68°F 90% 1 mph NNE 29.97in
      10:00 pm
      Light Rain
      70°F 72°F 62% 0.02in 85% 67°F 90% 1 mph NE 29.98in
      11:00 pm
      Light Rain
      70°F 72°F 62% 0.02in 84% 67°F 90% 1 mph NE 29.99in
      Additional Conditions
      1. Pressure 29.89 in
      2. Visibility 1.9 miles
      3. Clouds Cloudy
      4. Dew Point68°F
      5. Humidity 86%
      6. Rainfall 0.05 in
      7. Snow Depth 0 in
      MGSM Station History
      Almanac for
      1. Forecast Average Record
      2. Temperature
      3. High 79°F -°F -°F
      4. Low 65°F -°F -°F
      5. Rain/Snow Depth
      6. Precipitation 0.1 in - in -
      7. Snow 0 in - in -
      Almanac for
      1. Forecast Average Record
      2. Temperature
      3. High 80°F -°F -°F
      4. Low 67°F -°F -°F
      Astronomy
      1. Sun Rise Set
      2. Actual Time 5:58 AM 5:49 PM
      3. Civil Twilight 5:37 AM 6:11 PM
      4. Nautical Twilight 5:12 AM 6:36PM
      5. Astronomical Twilight 4:47 AM 7:01 PM
      1. Length of Visible Light 12h 34m
      2. Length of Day 11h 51m
      3. Tomorrow will be 48 seconds shorter
      1. Moon 6:44 AM 6:29 PM
      2. Waxing Crescent0% of the Moon is Illuminated
      Oct 18
      Waxing Half First Qtr
      Oct 25
      Full Moon
      Nov 1
      Waning Half Last Qtr
      Nov 9
      New Moon
      Nearby Weather Stations
      Station Location
      Temp
      Windchill
      Heat Index
      Dew Point
      Humidity
      Wind
      Precip.
      Elev.
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      Level Access
      Glossary