June 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 June

June offers the first taste of summer in San Antonio. From May to June, daylight hours extend further, reaching their highest value at 14 hours. However, despite the hot days, rainfall lessens to 2.09in in June compared to May. Characterized by more sunshine and fewer clouds, San Antonio indeed starts reflecting the summer season. Residents start to enjoy water activities as the city's famous rivers provide a fun and cool escape from the heat.

Temperature

The onset of June brings a minor temperature shift, with the average high-temperature moving from a warm 85.6°F (29.8°C) in May to a tropical 92.1°F (33.4°C). Nightly temperatures drop to an average low of 72.7°F (22.6°C) in June.

Heat index

The heat index for June is computed to be a blazing hot 113°F (45°C). Beware: Heat exhaustion along with heat cramps are on the cards. Heatstroke could result from sustained physical activity.
Remember that heat index calculations are made for conditions in the shade with light wind. Exposing to direct sunshine may enhance heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', determines the feeling of heat when you account for the relative humidity. The impact of weather on an individual can be subjective, affected by the person's activity and heat perception, which can vary due to elements including wind, clothing, and metabolic differences. Sunshine, when direct, has the potential to intensify weather effects, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly important for children. Youths are typically more endangered than adults since they usually sweat less. Their larger skin surface concerning their smaller bodies and higher heat production due to activity further adds to their vulnerability.
Perspiration and the resultant sweat evaporation are the body's natural thermostat, helping regulate temperature. Elevated relative humidity diminishes evaporation, thereby reducing the body's ability to shed heat and creating a feeling of being too warm. As the body gains more heat than it can dissipate, there's a risk of increasing temperatures and resultant overheating.

Humidity

In June, the average relative humidity is 70%.

Rainfall

In San Antonio, during June, the rain falls for 13.1 days and regularly aggregates up to 2.09" (53mm) of 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

March through November are months without snowfall.

Daylight

June has the longest days of the year, with an average of 14h and 0min of daylight.
On the first day of the month, sunrise is at 6:34 am and sunset at 8:29 pm. On the last day of June, 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. A UV Index value of 6 to 7 symbolizes a high health risk from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: The maximum UV index, 7 during June, leads to the following recommendations:
Follow precautions and abide by sun safety rules. Deterrence of sunburn is imperative. Make an effort to avoid direct sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation, and note that objects like parasols or canopies might not offer full sun protection. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation.
Updated: Jul 14, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How hot does it get in June?

During June, San Antonio experiences an average high-temperature of 92.1°F (33.4°C) and a low-temperature of 72.7°F (22.6°C). In June, the average heat index (a.k.a. 'feels like', 'real feel'), which combines air temperature and relative humidity, is computed to be 113°F (45°C).

What is the average humidity in June in San Antonio?

The average relative humidity in June is 70%.

How many days does it rain in June?

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

When are the longest days?

With an average of 14h and 0min of daylight, June has the longest days of the year.

What is the average length of the day in June?

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

When are sunrise and sunset in June?

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, in San Antonio, sunrise is at 6:37 am and sunset at 8:37 pm CDT.

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

In June, the average sunshine duration is 9.3h.

What is the month with the highest UV index?

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

How high is the UV index in June?

In June, the average daily maximum UV index is 7. A UV Index reading of 6 to 7 represents a high hazard to health 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 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).

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).

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).

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%).

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").

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).

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").

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).

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 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).

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).

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).

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).

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).

San Antonio, Texas, USA

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