July weather forecast
San Antonio, TX

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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

Embracing the heart of summer, San Antonio's July weather becomes extremely hot. With recorded average temperature highs soaring to 95.5°F (35.3°C), July is typically the hottest month in the city. In contrast to the intense heat, the number of rain days are decreased to 10.4 days. The consistent, powerful sun during this period urges the locals to seek refuge in the cooling waters of the Guadalupe and Comal rivers. This heat makes the city ideal for outdoor barbecues, cookouts, and garden parties.

Temperature

San Antonio experiences an average high-temperature of a fiery hot 95.5°F (35.3°C) in July, subtly different from June's 92.1°F (33.4°C). During July nights, San Antonio records an average temperature of 74.8°F (23.8°C).

Heat index

The heat index in July is estimated at a burning hot 118.4°F (48°C). Mindful: Heat cramps and heat exhaustion are to be expected. Extended physical effort might result in heatstroke.
Heat index's context suggests values are appropriate for shady areas and slight breezes. Direct sunlight might cause an increase of up to 15 Fahrenheit (8 Celsius) degrees in the heat index.
Note: The heat index, also known as 'real feel' or 'feels like', is a composite of temperature and humidity figures to convey how warm it feels. A person's impression of weather can be swayed by numerous aspects, among them metabolic variations, pregnancy, and activity levels. It is essential to be conscious of the fact that direct sunlight can intensify the felt heat, leading to an elevation in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for babies and toddlers. Younglings frequently fail to recognize the requirement to rest and rehydrate. Thirst emerges late in dehydration - it is imperative to keep hydration levels high, particularly during extended physical exertions.
When temperatures rise, the human body turns to perspiration, using the cooling power of evaporating sweat. Under conditions of increased relative humidity, the evaporation rate lessens, causing the body to retain more heat than under less humid conditions. With body temperatures on the rise, inefficient heat shedding can lead to dehydration and its associated complications.

Humidity

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

Rainfall

In San Antonio, in July, it is raining for 10.4 days, with typically 1.61" (41mm) of accumulated precipitation. In San Antonio, during the entire year, the rain falls for 144.5 days and collects up to 22.6" (574mm) of precipitation.

Snowfall

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

Daylight

The average length of the day in July is 13h and 49min.
On the first day of July, sunrise is at 6:38 am and sunset at 8:37 pm. On the last day of the month, sunrise is at 6:53 am and sunset at 8:26 pm CDT.

Sunshine

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

UV index

June through August, with an average maximum UV index of 7, are months with the highest UV index in San Antonio. A UV Index estimate of 6 to 7 represents a high health hazard from unsafe exposure to UV radiation for the average person.
Note: A maximum daily UV index of 7 during July morphs into the following directions:
Resist extreme sun exposure. Guarding against solar damage is essential. The Sun's UV radiation is most intense from 10 a.m. to 4 p.m. Try to avoid direct sun exposure during these hours. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized.
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Frequently asked questions

How hot is it in San Antonio in July?

In July, the average high-temperature and low-temperature in San Antonio, Texas, are 95.5°F (35.3°C) and 74.8°F (23.8°C) respectively. The average heat index (a.k.a. 'feels like', 'felt air temperature'), which combines air temperature and relative humidity, in July is estimated at 118.4°F (48°C).

What is the average humidity in July in San Antonio?

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

How much does it rain in San Antonio in July?

In San Antonio, in July, during 10.4 rainfall days, 1.61" (41mm) of precipitation is typically accumulated.

When it does not snow in San Antonio?

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

What is the average length of the day in July in San Antonio?

In San Antonio, Texas, the average day length in July is 13h and 49min.

When is the sunrise / sunset in July in San Antonio?

On the first day of July, sunrise is at 6:38 am and sunset at 8:37 pm. On the last day of the month, sunrise is at 6:53 am and sunset at 8:26 pm CDT.

What month has the most sunshine in San Antonio?

The month with the most sunshine in San Antonio is July, with an average of 10.3h of sunshine.

How long on average sun shines in July in San Antonio?

In July, the average sunshine duration in San Antonio is 10.3h.

What is the month with the highest UV index in San Antonio?

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

How high is the UV index in July in San Antonio?

In July, the average daily maximum UV index is 7. A UV Index value of 6 to 7 symbolizes a high health vulnerability from unsafe exposure to Sun's UV rays.
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 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 5min

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 2min

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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San Antonio, Texas, USA

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