San Marcos, TX Weather

San Marcos, TX climate is hot during summer when temperatures tend to be in the 80's and cool during winter when temperatures tend to be in the 50's.

The warmest month of the year is August with an average maximum temperature of 9.99 degrees Fahrenheit, while the coldest month of the year is January with an average minimum temperature of 9.99 degrees Fahrenheit.

Temperature variations between night and day tend to be moderate during summer with a difference that can reach 22 degrees Fahrenheit, and moderate during winter with an average difference of 23 degrees Fahrenheit.

The annual average precipitation at San Marcos is 9.99 Inches. Rainfall in is fairly evenly distributed throughout the year. The wettest month of the year is May with an average rainfall of 5.31 Inches.

Weather Data

Normal Climate

Normal Temperatures

(SAN MARCOS Weather station, 1.55 miles from San Marcos)

Month	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Annual
Max °F	61.1	65.8	73.4	79.6	85.7	91.5	95.1	95.4	90.7	82.3	71.3	63.3	79.6
Mean °F	49.9	53.9	61.6	68.2	75.6	81.5	84.4	84.4	79.7	70.5	59.9	52.1	68.5
Min °F	38.6	42.0	49.7	56.8	65.5	71.5	73.7	73.4	68.6	58.7	48.5	40.8	57.3

Normal Precipitation