San Marcos Texas Climate Data

Monthly Average Climate Data for San Marcos Texas

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January39.3 °F62.3 °F2.28 in.
February42.9 °F66.2 °F1.8 in.
March49.9 °F72.6 °F2.94 in.
April56.6 °F79.4 °F2.9 in.
May65.2 °F85.8 °F4.65 in.
June71.4 °F91.8 °F3.36 in.
July73.1 °F95.0 °F2.1 in.
August73.3 °F96.5 °F2.64 in.
September68.0 °F90.4 °F3.58 in.
October58.4 °F82.1 °F4.19 in.
November48.3 °F71.3 °F2.76 in.
December41.0 °F63.7 °F2.46 in.
Annual57.3 °F79.8 °F35.66 in.

Climate Data for San Marcos Texas

Average First Frost DateNov. 21 - Nov. 30
Average Last Frost DateMar. 1 - Mar. 10
Average Days With Frost10-20 Days
Plant Hardiness Zone - 2023Zone 9a : 20°F to 25°F
Plant Hardiness Zone - 2012Zone 8b : 15°F to 20°F
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationCfa - Humid Subtropical Climate