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San Marcos, United States Snapshot 2026
Where is San Marcos?
San Marcos, United States
- Continent
- Americas
- Country
- United States
- City
- San Marcos
- Population
- 60.7K
- Elevation
- 188 m
- Coordinates
- 29.88°, -97.94°
San Marcos is a city in United States with a population of approximately 60.7K. Average temperatures range from 7°C (44°F) in January to 36°C (96°F) in August. The best time to visit is March, April, October, November. The city sits at an elevation of 188 m above sea level.
Time in San Marcos right now
Open full time & time zone page 06:22 22
Tuesday, June 16, 2026
IANA time zone
America/Chicago
Daylight saving
DST in effect
CST / CDT
Next DST change
November 1
backward -1h
Live weather in San Marcos
Daylight in San Marcos today
View full sunrise & sunset page Sunrise
Sunset
Day length
14h 04m
Climate normals for San Marcos
Long-term monthly averages based on historical data.
January
Fair 
February
Good March best
Excellent April best
Excellent May
Fair June
Fair July
Poor August
Poor September
Fair October best
Excellent November best
Excellent December
Good | Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January | 17°C / 7°C | 15°C / 4°C | 7days (54 mm) Good | 7h Good | 66% Muggy | 4.5 Moderate | Fair | View Details |
| February | 19°C / 9°C | 18°C / 6°C | 8days (49 mm) Wet | 6.7h Fair | 70% Muggy | 5 Moderate | Good | View Details |
| March best | 24°C / 13°C | 24°C / 12°C | 9days (61 mm) Wet | 8h Good | 67% Muggy | 6.6 High | Excellent | View Details |
| April best | 27°C / 16°C | 27°C / 15°C | 11days (101 mm) Wet | 8.8h Good | 68% Muggy | 7.5 Very High | Excellent | View Details |
| May | 30°C / 20°C | 32°C / 22°C | 14days (127 mm) Wet | 9.9h Good | 74% Muggy | 8.1 Very High | Fair | View Details |
| June | 33°C / 24°C | 37°C / 27°C | 10days (79 mm) Wet | 11.9h Excellent | 70% Muggy | 9.3 Very High | Fair | View Details |
| July | 35°C / 25°C | 38°C / 28°C | 8days (75 mm) Wet | 12h Excellent | 65% Muggy | 9.6 Very High | Poor | View Details |
| August | 36°C / 25°C | 39°C / 29°C | 8days (91 mm) Wet | 11.5h Excellent | 62% Muggy | 8.9 Very High | Poor | View Details |
| September | 32°C / 23°C | 35°C / 26°C | 8days (73 mm) Wet | 10.1h Excellent | 66% Muggy | 7.5 Very High | Fair | View Details |
| October best | 28°C / 18°C | 29°C / 18°C | 7days (66 mm) Good | 9.2h Good | 63% Muggy | 6.2 High | Excellent | View Details |
| November best | 22°C / 13°C | 22°C / 11°C | 8days (56 mm) Wet | 7.1h Good | 70% Muggy | 4.4 Moderate | Excellent | View Details |
| December | 19°C / 10°C | 18°C / 7°C | 7days (62 mm) Good | 6.4h Fair | 70% Muggy | 3.8 Moderate | Good | View Details |
Monthly Temperatures
HighLow
Line chart showing monthly temperatures. Jan: 17°C / 7°C . Feb: 19°C / 9°C . Mar: 24°C / 13°C . Apr: 27°C / 16°C . May: 30°C / 20°C . Jun: 33°C / 24°C . Jul: 35°C / 25°C . Aug: 36°C / 25°C . Sep: 32°C / 23°C . Oct: 28°C / 18°C . Nov: 22°C / 13°C . Dec: 19°C / 10°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 54 mm. Feb: 49 mm. Mar: 61 mm. Apr: 101 mm. May: 127 mm. Jun: 79 mm. Jul: 75 mm. Aug: 91 mm. Sep: 73 mm. Oct: 66 mm. Nov: 56 mm. Dec: 62 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 66%. Feb: 70%. Mar: 67%. Apr: 68%. May: 74%. Jun: 70%. Jul: 65%. Aug: 62%. Sep: 66%. Oct: 63%. Nov: 70%. Dec: 70%.
Monthly Wind Speed
Wind SpeedGusts
Bar chart showing monthly wind speed. Jan: 18 km/h . Feb: 19 km/h . Mar: 20 km/h . Apr: 20 km/h . May: 19 km/h . Jun: 17 km/h . Jul: 17 km/h . Aug: 16 km/h . Sep: 15 km/h . Oct: 16 km/h . Nov: 17 km/h . Dec: 18 km/h .
UV Index
UV Index
Bar chart showing monthly UV index. Jan: UV 5. Feb: UV 5. Mar: UV 7. Apr: UV 8. May: UV 8. Jun: UV 9. Jul: UV 10. Aug: UV 9. Sep: UV 8. Oct: UV 6. Nov: UV 4. Dec: UV 4.
Frequently Asked Questions
San Marcos has a population of approximately 60.7K.
The best months to visit San Marcos are March, April, October, November, when temperatures are pleasant and rainfall is lower.
San Marcos receives approximately 894mm of rainfall annually across 105 rainy days.
San Marcos is located in United States, in the Americas region.
San Marcos sits at an elevation of 188 m (617 ft) above sea level.