July weather forecast
San Antonio, TX

Buildings in San Antonio, Texas, with a calm view of the bridges across the waterfront
Buildings in San Antonio, Texas, with a calm view of the bridges across the waterfront

Weather in July

July is a very hot summer month in San Antonio, Texas, with temperature in the range of an average low of 74.8°F (23.8°C) and an average high of 95.5°F (35.3°C).

Temperature

In San Antonio, the average high-temperature in July is almost the same as in June - a sweltering 95.5°F (35.3°C). In San Antonio, the average low-temperature is 74.8°F (23.8°C).

Heat index

The average heat index in July is computed to be a burning hot 118.4°F (48°C). Beware: Heat cramps and heat exhaustion are very likely. Heatstroke is imminent with prolonged activity.
Note that heat index values are valued for light wind and location in the shade. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature', 'apparent temperature', 'real feel', or 'feels like', combines air temperature and relative humidity to represent a human perceived temperature equivalent. Additional factors like wind, metabolic differences, pregnancy, and activity influence one's weather impression. Be aware that direct exposure to sunlight increases heat impact and may raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.
The human body cools itself through perspiration, as excessive warmth is removed from the body through sweat evaporation. Under high air temperature and humidity (high heat index) conditions, perspiration is limited, and the perception of heat is increased. If the body can not disperse the excessive heat and body temperature reaches conditions of hyperthermia, above 99.5°F (37.5°C) to 100.9°F (38.3°C), thermal conditions are potentially life-threatening.

Humidity

The average relative humidity in July in San Antonio is 64%.

Rainfall

In San Antonio, it is raining for 10.4 days, with typically 1.61" (41mm) of accumulated precipitation. Throughout the year, in San Antonio, there are 144.5 rainfall days, and 22.6" (574mm) of precipitation is accumulated.

Snowfall

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

Daylight

In July, the average length of the day in San Antonio is 13h and 49min.
On the first day of the month, sunrise is at 6:37 am and sunset at 8:37 pm. On the last day of July, in San Antonio, Texas, sunrise is at 6:53 am and sunset at 8:27 pm CDT.

Sunshine

With an average of 10.3h of sunshine, July has the most sunshine of the year in San Antonio.

UV index

The months with the highest UV index are June through August, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV rays for ordinary individuals.
Note: The daily maximum UV index of 7 in July interpret into the following advice:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
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FAQ

What is the temperature in July in San Antonio?

The average high-temperature, in July, is 95.5°F (35.3°C), while the average low-temperature is 74.8°F (23.8°C). in July, the average heat index (a.k.a. 'feels like', 'real feel'), which combines relative humidity and air temperature, is computed to be 118.4°F (48°C).

What is the average humidity in July in San Antonio?

In July, the average relative humidity in San Antonio is 64%.

How much does it rain in San Antonio in July?

In San Antonio, Texas, in July, it is raining for 10.4 days, with typically 1.61" (41mm) of accumulated precipitation.

When it does not snow in San Antonio?

March through November are months without snowfall in San Antonio, Texas.

How many hours of daylight does San Antonio have in July?

The average day length in July in San Antonio is 13h and 49min.

When are sunrise and sunset in July in San Antonio?

On the first day of July in San Antonio, sunrise is at 6:37 am and sunset at 8:37 pm. On the last day of the month, sunrise is at 6:53 am and sunset at 8:27 pm CDT.

What month has the most sunshine in San Antonio?

With an average of 10.3h of sunshine, July has the most sunshine of the year in San Antonio, Texas.

How many hours of sunshine does San Antonio have in July?

The average sunshine duration in July in San Antonio is 10.3h.

When is the highest UV index in San Antonio?

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

What is the UV index intensity in July in San Antonio?

The average daily maximum UV index in July in San Antonio is 7. A UV Index of 6 to 7 symbolizes a high health risk from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in July
San Antonio, TX

Average temperature in July - San Antonio, TX
  • Average high temperature in July: 95.5°F

The warmest month (with the highest average high temperature) is August (96.6°F).
The month with the lowest average high temperature is January (61.7°F).

  • Average low temperature in July: 74.8°F

The month with the highest average low temperature is August (75.7°F).
The coldest month (with the lowest average low temperature) is January (44.2°F).

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Average pressure in July
San Antonio, TX

Average pressure in July - San Antonio, TX
  • Average pressure in July: 29.94"Hg

The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).

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Average wind speed in July
San Antonio, TX

Average wind speed in July - San Antonio, TX
  • Average wind speed in July: 7.6mph

The windiest month (with the highest average wind speed) is May (9mph).
The calmest month (with the lowest average wind speed) is September (6.5mph).

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Average humidity in July
San Antonio, TX

Average humidity in July - San Antonio, TX
  • Average humidity in July: 64%

The month with the highest relative humidity is May (73%).
The month with the lowest relative humidity is August (59%).

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Average rainfall in July
San Antonio, TX

Average rainfall in July - San Antonio, TX
  • Average rainfall in July: 1.61"

The wettest month (with the highest rainfall) is May (3.66").
The driest month (with the least rainfall) is February (0.98").

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Average rainfall days in July
San Antonio, TX

Average rainfall days in July - San Antonio, TX
  • Average rainfall days in July: 10.4 days

The month with the highest number of rainy days is September (17 days).
The month with the least rainy days is January (9.1 days).

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Average snowfall in July
San Antonio, TX

Average snowfall in July - San Antonio, TX
  • Average snowfall in July: 0"

The months with the highest snowfall are January and February (0.08").
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 July
San Antonio, TX

Average snowfall days in July - San Antonio, TX
  • Average snowfall days in July: 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 July /
Average sunshine in July
San Antonio, TX

Average daylight in July / Average sunshine in July - San Antonio, TX
  • Average daylight in July: 13h and 49min

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 July: 10h and 18min

The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is December (Average sunshine: 5h and 18min).

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Average sunshine days in July
San Antonio, TX

Average sunshine days in July - San Antonio, TX
  • Average sunshine days in July: 18.1 days

The month with the most sunshine days is January (20.3 days).
The months with the least sunshine days are May and September (11.8 days).

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Average UV index in July
San Antonio, TX

Average UV index in July - San Antonio, TX
  • Average UV index in July: 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 July
San Antonio, TX

Average cloud cover in July - San Antonio, TX
  • Average cloud cover in July: 28

The month with the most cloud cover is March (Cloud cover 47).
The month with the least cloud cover is August (Cloud cover 23).

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Average visibility in July
San Antonio, TX

Average visibility in July - San Antonio, TX
  • Average visibility in July: 6mi

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

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