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      Elev 1432 ft, 14.973 °N 91.896 °W

      San Marcos, GT

      Sun, Oct 18, 2026
      Tomorrow
      Sun 10/18
      High 80°f
      96% Precip. / 1.21 in
      Thunderstorms. High near 80F. Winds light and variable. Chance of rain 100%. 1 to 2 inches of rain expected.
      Tomorrow night
      Sun 10/18
      Low 68°f
      63% Precip. / 0.21 in
      Thunderstorms in the evening with a few showers possible overnight. Hazy. Low 68F. 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
      67°
      1AM
      67°
      2AM
      67°
      3AM
      66°
      4AM
      66°
      5AM
      69°
      5:59AM
      Sunrise
      6AM
      68°
      7AM
      69°
      8AM
      73°
      9AM
      77°
      10AM
      48%
      79°
      11AM
      76%
      79°
      12PM
      90%
      79°
      1PM
      97%
      79°
      2PM
      95%
      79°
      3PM
      90%
      78°
      4PM
      92%
      76°
      5PM
      93%
      75°
      5:45PM
      Sunset
      6PM
      79%
      74°
      7PM
      63%
      73°
      8PM
      41%
      72°
      9PM
      42%
      71°
      10PM
      52%
      71°
      11PM
      42%
      71°
      Time Conditions Temp. Feels Like Precip Amount Cloud Cover Dew Point Humidity Wind Pressure
      12:00 am
      Mostly Cloudy
      67°F 67°F 10% 0in 60% 64°F 91% 2 mph NE 29.94in
      1:00 am
      Mostly Cloudy
      67°F 67°F 11% 0in 66% 64°F 90% 1 mph N 29.92in
      2:00 am
      Mostly Cloudy
      67°F 67°F 4% 0in 68% 64°F 91% 1 mph E 29.91in
      3:00 am
      Mostly Cloudy
      66°F 66°F 5% 0in 71% 64°F 93% 2 mph ENE 29.9in
      4:00 am
      Mostly Cloudy
      66°F 66°F 5% 0in 76% 64°F 93% 2 mph NE 29.9in
      5:00 am
      Mostly Cloudy
      69°F 70°F 6% 0in 69% 66°F 92% 2 mph NE 29.87in
      6:00 am
      Partly Cloudy
      68°F 70°F 6% 0in 56% 66°F 93% 2 mph NE 29.88in
      7:00 am
      Partly Cloudy
      69°F 71°F 7% 0in 53% 67°F 95% 2 mph ENE 29.89in
      8:00 am
      Partly Cloudy
      73°F 75°F 7% 0in 57% 69°F 90% 1 mph NNE 29.9in
      9:00 am
      Partly Cloudy
      77°F 81°F 24% 0in 55% 71°F 83% 2 mph SW 29.9in
      10:00 am
      Scattered Thunderstorms
      79°F 83°F 48% 0.04in 78% 71°F 78% 4 mph WSW 29.91in
      11:00 am
      Thunderstorms
      79°F 84°F 76% 0.08in 99% 72°F 79% 4 mph SW 29.9in
      12:00 pm
      Thunderstorms
      79°F 84°F 90% 0.1in 98% 72°F 81% 5 mph SW 29.88in
      1:00 pm
      Thunderstorms
      79°F 84°F 97% 0.13in 100% 72°F 80% 6 mph SW 29.85in
      2:00 pm
      Thunderstorms
      79°F 84°F 95% 0.15in 100% 72°F 81% 5 mph SW 29.83in
      3:00 pm
      Thunderstorms
      78°F 83°F 90% 0.2in 100% 72°F 83% 6 mph SSW 29.82in
      4:00 pm
      Thunderstorms
      76°F 80°F 92% 0.23in 97% 72°F 87% 4 mph SSW 29.83in
      5:00 pm
      Thunderstorms
      75°F 80°F 93% 0.24in 97% 72°F 89% 3 mph S 29.84in
      6:00 pm
      Thunderstorms
      74°F 77°F 79% 0.06in 100% 71°F 91% 2 mph E 29.87in
      7:00 pm
      Thunderstorms
      73°F 76°F 63% 0.02in 98% 70°F 91% 1 mph NE 29.89in
      8:00 pm
      Scattered Thunderstorms
      72°F 75°F 41% 0.01in 95% 70°F 92% 1 mph NE 29.9in
      9:00 pm
      Showers
      71°F 74°F 42% 0.01in 94% 70°F 95% 1 mph NE 29.92in
      10:00 pm
      Scattered Thunderstorms
      71°F 73°F 52% 0.04in 95% 69°F 94% 1 mph NNE 29.93in
      11:00 pm
      Scattered Thunderstorms
      71°F 73°F 42% 0.04in 89% 69°F 95% 1 mph NNE 29.93in
      Additional Conditions
      1. Pressure 29.96 in
      2. Visibility 4 miles
      3. Clouds Cloudy
      4. Dew Point65°F
      5. Humidity 93%
      6. Rainfall 0 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 67°F -°F -°F
      5. Rain/Snow Depth
      6. Precipitation 0 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 5:59 AM 5:46 PM
      3. Civil Twilight 5:37 AM 6:07 PM
      4. Nautical Twilight 5:12 AM 6:32PM
      5. Astronomical Twilight 4:47 AM 6:57 PM
      1. Length of Visible Light 12h 29m
      2. Length of Day 11h 46m
      3. Tomorrow will be 47 seconds shorter
      1. Moon 11:57 AM 11:19 PM
      2. Waxing Crescent41% 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