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Climate & Weather Averages in San Marcos, Texas, USA. Currently: 80 °F. Overcast. (Weather station: San Marcos Municipal Airport, USA). See more current weather.
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San Marcos weather averages and climate San Marcos, Texas. Monthly temperature, precipitation and hours of sunshine. A climate graph showing rainfall, temperatures and normals.
Weather.com brings you the most accurate monthly weather forecast for San Marcos, TX with average/record and high/low temperatures, precipitation and more.
San Marcos, TX enjoys a temperate climate, with mild winters and warm to hot summers. The average high temperatures range from 65 degrees F in the winter months to 95 degrees F in the summer months. Rainfall is most common during the spring and summer months, reaching an average of 32 inches of rain per year throughout the region.
Expand. Contents. Weather in January. January, the same as December, in San Marcos, Texas, is another refreshing winter month, with an average temperature ranging between max 59.9°F (15.5°C) and min 42.8°F (6°C). The month of January, characterized by an average high of 59.9°F (15.5°C) and a low of 42.8°F (6°C), is recognized as the coldest.
- During the coldest month in San Marcos, January , temperatures average a high of 59.9°F and a low of 42.8°F .
- Throughout the year, in San Marcos, there are 151.8 rainfall days , and 26.89" of precipitation is accumulated.
- January , February and December are months with snowfall in San Marcos.
- The months with the most snowfall in San Marcos, Texas, are January and February , with an average 0.12" of accumulated snow .
- In San Marcos, during the entire year, snow falls for 0.7 days and aggregates up to 0.28" of snow .
- The month with the least rainfall is February , when the rain falls for 11.3 days and typically collects 1.1" of precipitation .
- March through November are months without snowfall in San Marcos.
- On Sunday, March 12. 2023 , at 2:00 am, Daylight Saving Time starts in San Marcos, Texas, and the time zone changes from CST to CDT. Daylight Sa...
- May is the most humid month , with an average relative humidity of 77% .
In San Marcos, the average annual temperature is 20.5 °C | 68.9 °F. The precipitation level on a yearly basis amounts to 936 mm | 36.9 inch as per the meteorological records. San Marcos are in the northern hemisphere. Summer starts here at the end of June and ends in September. There are the months of summer: June, July, August, September.
San Marcos, TX's climate averages. Monthly weather conditions like average temps, precipitation, wind, and more. San Marcos's yearly averages for humidity, fog, sun, and snow days.
