August weather forecast
San Marcos, TX

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Weather in August

August, the last month of the summer in San Marcos, is a sweltering month, with an average temperature ranging between max 95.9°F (35.5°C) and min 74.7°F (23.7°C).

Temperature

San Marcos's August weather reaches an average high of 95.9°F (35.5°C) and an average low of 74.7°F (23.7°C), making it the warmest month.

Heat index

Throughout August, the heat index is evaluated at a blazing hot 118.4°F (48°C). Observe: Heat exhaustion and heat cramps are probable. Heatstroke is on the horizon with prolonged exertion.
The heat index's values are generally associated with conditions in shade and light breezes. The heat index might be elevated by 15 Fahrenheit (8 Celsius) degrees due to direct sun exposure.
Note: The heat index, also known as 'feels like' or 'apparent temperature', ties air temperature with relative humidity to produce the perceived temperature sensation. The individual's impression of temperature can be affected by numerous factors such as metabolic variations, physical exertion, and attire. Exposure to direct sun rays can influence the heat you feel, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Children often overlook the need for breaks and fluid intake. Thirst is a late-stage sign of dehydration - hence, it is necessary to stay hydrated, especially during extended periods of physical activities.
The human body keeps its cool primarily through perspiration, as this process enables sweat to evaporate, taking away the excess heat. An upsurge in relative humidity affects normal body cooling mechanisms by slowing evaporation, hence reducing the rate at which the body cools and intensifying the perception of heat. Exceeding the body's heat disposal threshold results in a rise in body temperature and potential thermal disorders.

Humidity

The least humid month in San Marcos is August, with an average relative humidity of 62%.

Rainfall

In August, in San Marcos, Texas, the rain falls for 10.9 days. Throughout August, 2.05" (52mm) of precipitation is accumulated. Throughout the year, in San Marcos, there are 151.8 rainfall days, and 26.89" (683mm) of precipitation is accumulated.

Snowfall

In San Marcos, snow does not fall in March through November.

Daylight

The average length of the day in August in San Marcos is 13h and 11min.
On the first day of the month, sunrise is at 6:51 am and sunset at 8:24 pm. On the last day of August, in San Marcos, sunrise is at 7:08 am and sunset at 7:54 pm CDT.

Sunshine

July and August, with an average of 10h of sunshine, are months with the most sunshine.

UV index

The months with the highest UV index are June through August, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV radiation for the average person.
Note: In August, the UV index of 7 transforms into the following advice:
Guard oneself from overexposure. Defence against sun injury is vital. Limit your direct sun exposure, especially between 10 a.m. and 4 p.m., when UV radiation is strongest. Shade structures might not provide complete sun protection. Boost your sun resistance with garments that are densely woven yet spacious.
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Frequently asked questions

What part of the year is the hottest in San Marcos?

San Marcos, Texas, experiences its average highest temperatures in August, reaching a peak of 95.9°F (35.5°C) and a minimum of 74.7°F (23.7°C).

How hot is it in San Marcos in August?

The average high-temperature and low-temperature in San Marcos, Texas, during August are 95.9°F (35.5°C) and 74.7°F (23.7°C) respectively. The average heat index (a.k.a. 'felt air temperature', 'real feel'), which combines air temperature and relative humidity, in August is evaluated at 118.4°F (48°C).

What is the least humid month in San Marcos?

August is the least humid month, with an average relative humidity of 62%.

What is the average humidity in August in San Marcos?

In August, the average relative humidity in San Marcos is 62%.

How many days does it rain in August in San Marcos?

In August, the rain falls for 10.9 days. Throughout August, 2.05" (52mm) of precipitation is accumulated.

When it does not snow in San Marcos?

In San Marcos, Texas, snow does not fall in March through November.

How many hours of daylight does San Marcos have in August?

In August, the average day length in San Marcos is 13h and 11min.

When are sunrise and sunset in August in San Marcos?

On the first day of August in San Marcos, Texas, sunrise is at 6:51 am and sunset at 8:24 pm. On the last day of the month, sunrise is at 7:08 am and sunset at 7:54 pm CDT.

What are the months with the most sunshine in San Marcos?

The months with the most sunshine in San Marcos, Texas, are July and August, with an average of 10h of sunshine.

How long on average sun shines in August in San Marcos?

The average sunshine duration in August in San Marcos, Texas, is 10h.

What are the months with the highest UV index in San Marcos?

The months with the highest UV index in San Marcos, Texas, are June through August, with an average maximum UV index of 7.

What is the UV index intensity in August in San Marcos?

In August, the average daily maximum UV index is 7. A UV Index of 6 to 7 symbolizes a high health threat from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in August
San Marcos, TX

Average temperature in August - San Marcos, TX
  • Average high temperature in August: 95.9°F

The warmest month (with the highest average high temperature) is August (95.9°F).
The month with the lowest average high temperature is January (59.9°F).

  • Average low temperature in August: 74.7°F

The month with the highest average low temperature is August (74.7°F).
The coldest month (with the lowest average low temperature) is January (42.8°F).

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Average pressure in August
San Marcos, TX

Average pressure in August - San Marcos, TX
  • Average pressure in August: 29.93"Hg

The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).

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Average wind speed in August
San Marcos, TX

Average wind speed in August - San Marcos, TX
  • Average wind speed in August: 6.9mph

The windiest month (with the highest average wind speed) is February (9.1mph).
The calmest month (with the lowest average wind speed) is September (6.1mph).

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Average humidity in August
San Marcos, TX

Average humidity in August - San Marcos, TX
  • Average humidity in August: 62%

The month with the highest relative humidity is May (77%).
The month with the lowest relative humidity is August (62%).

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Average rainfall in August
San Marcos, TX

Average rainfall in August - San Marcos, TX
  • Average rainfall in August: 2.05"

The wettest month (with the highest rainfall) is May (4.57").
The driest month (with the least rainfall) is February (1.1").

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Average rainfall days in August
San Marcos, TX

Average rainfall days in August - San Marcos, TX
  • Average rainfall days in August: 10.9 days

The month with the highest number of rainy days is May (16.6 days).
The month with the least rainy days is January (9.4 days).

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Average snowfall in August
San Marcos, TX

Average snowfall in August - San Marcos, TX
  • Average snowfall in August: 0"

The months with the highest snowfall are January and February (0.12").
The months with the least snowfall are March, April, May, June, July, August, September, October and November (0").

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Average snowfall days in August
San Marcos, TX

Average snowfall days in August - San Marcos, TX
  • Average snowfall days in August: 0 days

The months with the highest number of snowfall days are January and February (0.3 days).
The months with the least snowfall days are March, April, May, June, July, August, September, October and November (0 days).

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Average daylight in August /
Average sunshine in August
San Marcos, TX

Average daylight in August / Average sunshine in August - San Marcos, TX
  • Average daylight in August: 13h and 1min

The month with the longest days is June (Average daylight: 14h and 0min).
The month with the shortest days is December (Average daylight: 10h and 18min).

  • Average sunshine in August: 10h and 0min

The months with the most sunshine are July and August (Average sunshine: 10h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 12min).

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Average sunshine days in August
San Marcos, TX

Average sunshine days in August - San Marcos, TX
  • Average sunshine days in August: 18.4 days

The month with the most sunshine days is January (19.4 days).
The month with the least sunshine days is May (11.9 days).

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Average UV index in August
San Marcos, TX

Average UV index in August - San Marcos, TX
  • Average UV index in August: 7

The months with the highest UV index are June, July and August (UV index 7).
The month with the lowest UV index is December (UV index 3).

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Average cloud cover in August
San Marcos, TX

Average cloud cover in August - San Marcos, TX
  • Average cloud cover in August: 25

The month with the most cloud cover is March (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 25).

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Average visibility in August
San Marcos, TX

Average visibility in August - San Marcos, TX
  • Average visibility in August: 6mi

The months with the highest visibility are January, February, March, April, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is May (5mi).

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San Marcos, Texas, USA

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