June 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 June

The first month of the summer, June, is a tropical month in San Antonio, Texas, with an average temperature fluctuating between 72.7°F (22.6°C) and 92.1°F (33.4°C).

Temperature

In June, the average high-temperature slightly increases from a warm 85.6°F (29.8°C) in May to a tropical 92.1°F (33.4°C). In San Antonio, in June, the average low-temperature is 72.7°F (22.6°C).

Heat index

The average heat index in June is estimated at a life-threatening hot 113°F (45°C). Be wary: Heat exhaustion and heat cramps are highly anticipated. With continued activity, heatstroke is very likely.
Take into consideration that the heat index values are calculated for shade and light wind conditions. With exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel', 'felt air temperature', 'apparent temperature', or 'feels like', is a measure of how hot it feels when the actual air humidity is factored in. This effect is individual, with diverse people perceiving weather differently for numerous reasons (clothing, wind, metabolic differences), and activity. 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 normally cools itself by perspiration, as evaporated sweat carries heat away from the body. With a lot of moisture in the air, the evaporation process is not as effective, and the body does not cool down as efficiently, creating a perception of overheating. When heat gain surpasses the level the body can shed, body temperature begins to increase, and consequently, overheating and dehydration can occur, with varying severity.

Humidity

In San Antonio, the average relative humidity in June is 70%.

Rainfall

In San Antonio, it is raining for 13.1 days, with typically 2.09" (53mm) of accumulated precipitation. Throughout the year, there are 144.5 rainfall days, and 22.6" (574mm) of precipitation is accumulated.

Snowfall

March through November are months without snowfall.

Daylight

With an average of 14h and 0min of daylight, June has the longest days of the year.
On the first day of June, sunrise is at 6:34 am and sunset at 8:29 pm. On the last day of the month, sunrise is at 6:37 am and sunset at 8:37 pm CDT.

Sunshine

In San Antonio, the average sunshine in June is 9.3h.

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 value of 6 to 7 symbolizes a high health risk from unprotected exposure to Sun's UV rays for the ordinary person.
Note: The daily maximum UV index of 7 in June interpret into the following advice:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.
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FAQ

What is the temperature in June in San Antonio?

In San Antonio, Texas, in June, the average high-temperature is 92.1°F (33.4°C), and the average low-temperature is 72.7°F (22.6°C). The average heat index (a.k.a. 'real feel', 'felt air temperature'), which takes the relative humidity and factors it into the air temperature reading, in June is estimated at 113°F (45°C).

What is the average humidity in June in San Antonio?

The average relative humidity in June is 70%.

How much does it rain in San Antonio in June?

In San Antonio, Texas, in June, it is raining for 13.1 days, with typically 2.09" (53mm) of accumulated precipitation.

When it does not snow in San Antonio?

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

When are the longest days in San Antonio?

June has the longest days of the year in San Antonio, Texas, with an average of 14h and 0min of daylight.

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

In June, the average day length in San Antonio is 14h and 0min.

When are sunrise and sunset in June in San Antonio?

In June, on the first day of the month, sunrise is at 6:34 am and sunset at 8:29 pm. On the last day of the month, sunrise is at 6:37 am and sunset at 8:37 pm CDT.

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

The average sunshine duration in June is 9.3h.

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

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

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

The average daily maximum UV index in June is 7. A UV Index estimate of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in June
San Antonio, TX

Average temperature in June - San Antonio, TX
  • Average high temperature in June: 92.1°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 June: 72.7°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 June
San Antonio, TX

Average pressure in June - San Antonio, TX
  • Average pressure in June: 29.89"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 June
San Antonio, TX

Average wind speed in June - San Antonio, TX
  • Average wind speed in June: 8mph

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 June
San Antonio, TX

Average humidity in June - San Antonio, TX
  • Average humidity in June: 70%

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 June
San Antonio, TX

Average rainfall in June - San Antonio, TX
  • Average rainfall in June: 2.09"

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 June
San Antonio, TX

Average rainfall days in June - San Antonio, TX
  • Average rainfall days in June: 13.1 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 June
San Antonio, TX

Average snowfall in June - San Antonio, TX
  • Average snowfall in June: 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 June
San Antonio, TX

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

Average daylight in June / Average sunshine in June - San Antonio, TX
  • Average daylight in June: 14h and 0min

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 June: 9h 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 June
San Antonio, TX

Average sunshine days in June - San Antonio, TX
  • Average sunshine days in June: 14.2 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 June
San Antonio, TX

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

Average cloud cover in June - San Antonio, TX
  • Average cloud cover in June: 37

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 June
San Antonio, TX

Average visibility in June - San Antonio, TX
  • Average visibility in June: 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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