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Climate & Weather Averages in San Marcos, Texas, USA

Currently: 84 °F. Sunny. (Weather station: San Marcos Municipal Airport, USA). See more current weather

Annual Weather Averages Near San Marcos

Averages are for San Marcos Municipal Airport, which is 5 miles from San Marcos.

Based on weather reports collected during 1985–2015.

All Year Climate & Weather Averages in San Marcos

High Temp: 97 °F

Low Temp: 40 °F

Mean Temp: 69 °F

Precipitation: 0.73"

Humidity: 66%

Dew Point: 55 °F

Wind: 8 mph

Pressure: 30.02 "Hg

Visibility: 10 mi

January Climate & Weather Averages in San Marcos

High Temp: 63 °F

Low Temp: 40 °F

Mean Temp: 51 °F

Precipitation: 0.66"

Humidity: 65%

Dew Point: 38 °F

Wind: 9 mph

Pressure: 30.15 "Hg

Visibility: 10 mi

February Climate & Weather Averages in San Marcos

High Temp: 67 °F

Low Temp: 43 °F

Mean Temp: 55 °F

Precipitation: 0.67"

Humidity: 65%

Dew Point: 42 °F

Wind: 9 mph

Pressure: 30.09 "Hg

Visibility: 10 mi

March Climate & Weather Averages in San Marcos

High Temp: 74 °F

Low Temp: 50 °F

Mean Temp: 62 °F

Precipitation: 0.74"

Humidity: 64%

Dew Point: 48 °F

Wind: 10 mph

Pressure: 30.02 "Hg

Visibility: 10 mi

April Climate & Weather Averages in San Marcos

High Temp: 81 °F

Low Temp: 58 °F

Mean Temp: 69 °F

Precipitation: 0.69"

Humidity: 65%

Dew Point: 56 °F

Wind: 10 mph

Pressure: 29.95 "Hg

Visibility: 10 mi

May Climate & Weather Averages in San Marcos

High Temp: 87 °F

Low Temp: 66 °F

Mean Temp: 76 °F

Precipitation: 1.47"

Humidity: 71%

Dew Point: 65 °F

Wind: 9 mph

Pressure: 29.92 "Hg

Visibility: 10 mi

June Climate & Weather Averages in San Marcos

High Temp: 93 °F

Low Temp: 72 °F

Mean Temp: 82 °F

Precipitation: 1.24"

Humidity: 68%

Dew Point: 69 °F

Wind: 8 mph

Pressure: 29.92 "Hg

Visibility: 10 mi

July Climate & Weather Averages in San Marcos

High Temp: 95 °F

Low Temp: 74 °F

Mean Temp: 85 °F

Precipitation: 0.53"

Humidity: 66%

Dew Point: 70 °F

Wind: 8 mph

Pressure: 29.98 "Hg

Visibility: 10 mi

August Climate & Weather Averages in San Marcos

High Temp: 97 °F

Low Temp: 74 °F

Mean Temp: 85 °F

Precipitation: 0.32"

Humidity: 62%

Dew Point: 69 °F

Wind: 7 mph

Pressure: 29.97 "Hg

Visibility: 10 mi

September Climate & Weather Averages in San Marcos

High Temp: 92 °F

Low Temp: 69 °F

Mean Temp: 80 °F

Precipitation: 0.88"

Humidity: 66%

Dew Point: 65 °F

Wind: 7 mph

Pressure: 29.97 "Hg

Visibility: 10 mi

October Climate & Weather Averages in San Marcos

High Temp: 83 °F

Low Temp: 59 °F

Mean Temp: 71 °F

Precipitation: 0.68"

Humidity: 66%

Dew Point: 57 °F

Wind: 8 mph

Pressure: 30.03 "Hg

Visibility: 10 mi

November Climate & Weather Averages in San Marcos

High Temp: 72 °F

Low Temp: 49 °F

Mean Temp: 61 °F

Precipitation: 0.46"

Humidity: 67%

Dew Point: 48 °F

Wind: 8 mph

Pressure: 30.10 "Hg

Visibility: 10 mi

December Climate & Weather Averages in San Marcos

High Temp: 64 °F

Low Temp: 41 °F

Mean Temp: 53 °F

Precipitation: 0.43"

Humidity: 67%

Dew Point: 40 °F

Wind: 8 mph

Pressure: 30.13 "Hg

Visibility: 10 mi

Quick Climate Info

Hottest MonthAugust (85 °F avg)
Coldest MonthJanuary (51 °F avg)
Wettest MonthMay (1.47" avg)
Windiest MonthMarch (10 mph avg)
Annual precip.8.78" (per year)

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