San Marcos, TX Weather - Forecast & Monthly Averages

TEMPERATURE	75
HUMIDITY	83
PRESSURE	101970
WIND COND.	170 16.6

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Weather Quick Facts

The highest monthly average temperature in San Marcos for August is 85.1 degrees
The lowest monthly average temperature in San Marcos for January is 50.5 degrees
The most monthly precipitation in San Marcos occurs in April with 18.2 inches
The air quality index in San Marcos is 5% worse than the national average
The pollution index in San Marcos is 31% better than the national average

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San Marcos Average Temperature

In the event that the weather data was unavailable for this city, estimates based upon nearby cities were used.
Month	Temp. _(min)	Temp. _(max)	Temp. _(avg)	Precipitation
January	40°F	64°F	50°F	8.7"
February	44°F	69°F	55°F	2.4"
March	52°F	76°F	62°F	12.6"
April	59°F	82°F	69°F	18.2"
May	65°F	87°F	75°F	7.9"
June	72°F	94°F	82°F	6.3"
July	74°F	96°F	84°F	9.3"
August	74°F	98°F	85°F	13.2"
September	69°F	92°F	79°F	7.0"
October	59°F	84°F	70°F	6.2"
November	50°F	74°F	61°F	5.4"
December	43°F	65°F	52°F	3.5"

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San Marcos air quality index & pollution index

In the event that the air quality/pollution data was unavailable for this city, estimates based upon nearby cities were used.
Index	San Marcos	Texas	National
Air quality index	44	52	42
Pollution index	1,877,920	2,009,300	2,726,193

San Marcos air quality information

Measurement	Total
Days measured	365
Days with good air quality	249
Days with moderate air quality	114
Days w/ poor A.Q. for sensitive groups	2
Days with unhealthy air quality	0

San Marcos air quality information

Pollutant	Total
Arsenic	0.001%
Benzene	0.020%
Carbon Tetrachloride	0.002%
Lead	0.001%
Mercury	0.010%

Average monthly San Marcos temperature with heat index

San Marcos monthly precipitation with daily maximum

San Marcos monthly snow depth with daily maximum

San Marcos monthly wind speed information

Nearby cities with good air quality

City	Population	Air Quality Index	National Avg.
Redwood, TX	3,349	44	12.0%
Mountain City, TX	536	44	12.0%
Wimberley, TX	3,168	44	12.0%
Staples, TX	180	44	12.0%
Mustang Ridge, TX	1,229	44	12.0%
San Marcos, TX	64,053	44	12.0%

Cities with similar population

City	Population	Air Quality Index	National Avg.
Cheyenne, WY	64,099	43	14.0%
South Hill, WA	64,104	30	40.0%
Bellevue, NE	63,970	40	20.0%
Youngstown, OH	64,152	42	16.0%
Lake Elsinore, CA	64,201	89	78.0%
San Marcos, TX	64,053	44	12.0%

Source: The San Marcos, TX weather data displayed above is derived from the NOAA (National Oceanic and Atmospheric). Air quality and pollution data is derived from the EPA (United States Environmental Protection Agency). Air quality and pollution levels measured in a particular area may not be representative of the entire county.