San Antonio, Texas, boasts a subtropical climate that offers warm summers and mild winters, making it an appealing destination year-round.
The hottest month is August, with average high temperatures reaching 95°F. Meanwhile, the coldest month is January, with lows averaging around 43°F. This makes San Antonio an ideal place for those who enjoy a warm climate with minimal extreme cold.
From late November to late February, the city experiences its cool season, where daily high temperatures stay below 70°F.
Rainfall tends to peak in May, with an average of 3.66 inches, which is the wettest month of the year.
Visitors and residents alike can expect a humid climate, especially during the spring when humidity levels rise noticeably.
For a city with so much to offer in terms of outdoor activities and cultural experiences, understanding the weather trends is essential for planning.
Whether you’re a local or just planning a visit, having a grasp on the climate in San Antonio can help you make the most of your time in this vibrant Texan city.
Average Temperature In San Antonio, Texas
San Antonio experiences a wide range of temperatures throughout the year.
Hot Season:
- The hot season lasts from May 29 to September 18.
- During this time, the average daily high temperature is above 89°F.
- August is the hottest month, with highs around 95°F and lows of 75°F.
Cool Season:
- The cool season lasts from November 26 to February 20.
- Average daily high temperatures during this period are below 74°F.
- January is the coldest month, with highs of 70°F and lows around 48°F.
Year-Round Temperature Highlights:
| Month | Average High (°F) | Average Low (°F) |
|---|---|---|
| January | 70 | 48 |
| August | 95 | 75 |
San Antonio rarely sees freezing temperatures. Winters are mild, making it a comfortable place year-round.
Summer nights remain warm, with temperatures often above 69°F.
It’s common for summer days to exceed 100°F, indicating extremely hot conditions.
For more detailed readings on hourly average temperatures, one can explore specific weather resources.
Terms like warm, cold, hot, and cool all apply to different times of the year, reflecting a varied climate.
Average Precipitation In San Antonio, Texas
San Antonio experiences a varied climate with periods of both significant rainfall and dry spells.
Average Rainfall In San Antonio, Texas
San Antonio receives about 32 inches of rain annually.
The rainiest months generally fall between May and October, with May often being the wettest month, seeing over 4 inches of rain.
Rain during these months can be frequent and intense.
The high amount of rain is a result of thunderstorms that often occur during late spring and summer.
The wetter season typically lasts for 5 months, starting in late spring.
Wet days are common in this period, with rainfall often arriving in short, heavy bursts.
During the drier months from November to April, rainfall decreases significantly.
This period sees sporadic rain, with some months receiving less than 2 inches.
The total precipitation during these months is much lower, leading to a more dry and arid climate.
Average Snow In San Antonio, Texas
Snowfall in San Antonio is extremely rare. The city’s climate does not support frequent snow events with an average snowfall of less than 1 inch per year.
This makes snow a rare occurrence usually bringing excitement when it does happen.
Most winters see no snow at all, with the coolest months being December and January.
These months can still maintain temperatures that rarely drop low enough to produce snow. However, in rare cases, light snow or ice can occur, though it rarely disrupts daily life.
During these rare events, roads can become slippery, and caution is advised.
For deep dives into snow patterns, publications such as Snow and Ice offer more detailed insights.
It’s important to monitor weather updates during the cold months to stay prepared.
San Antonio’s minimal snowfall and significant rainfall make for a dynamic climate that offers various weather patterns throughout the year.
Average Sun In San Antonio, Texas
San Antonio enjoys a significant amount of sunlight throughout the year, with notable variations between seasons.
Residents can expect changes in daylight hours from winter to summer, affecting the amount of sunshine they receive daily.
Average Daily Shortwave Solar Energy In San Antonio, Texas
San Antonio experiences an average of over 5 kWh/m² of solar energy per day.
The highest solar energy occurs in June, when the sun is at its highest elevation, contributing to longer daylight hours.
Winter months, especially December, see the shortest days with approximately 10 hours of daylight.
During the summer, especially in June, San Antonio sees upwards of 14 hours of daylight.
The abundance of clear skies in summer leads to maximum sunshine.
Daylight saving time also impacts the perception of daylight, typically adding an hour of sunlight in the evening during the summer months.
More specifics on the sunshine hours and related info can be referenced from the detailed weather averages for San Antonio.
Average Humidity In San Antonio, Texas
San Antonio experiences varying humidity throughout the year. The city’s average annual relative humidity sits at approximately 67%.
May is the most humid month, with an average relative humidity of 71%. Meanwhile, March tends to be the least humid, averaging around 63%.
The dew point also fluctuates, affecting how muggy it feels.
Higher dew points make the air feel more humid and uncomfortable, especially during the summer.
The spring months of March, April, and May see increasing humidity, with May reaching about 73%.
This time of year is characterized by the most significant changes in muggy conditions.
| Month | Average Relative Humidity |
|---|---|
| January | 66% |
| February | 64% |
| March | 63% |
| April | 66% |
| May | 71% |
| June | 70% |
| July | 68% |
| August | 67% |
| September | 68% |
| October | 69% |
| November | 67% |
| December | 66% |
For more details, visit World Weather & Climate Information.
Average Wind In San Antonio, Texas
San Antonio experiences moderate wind speeds throughout the year. The average wind speed typically ranges from 5 to 10 mph.
During the spring, wind speeds often increase, making this period one of the windiest times.
The windiest month in San Antonio is usually March. In March, wind speeds can exceed 10 mph, providing a noticeable breeze compared to other months.
The direction of the wind generally comes from the southeast. This contributes to the city’s weather patterns, bringing in warm and moist air from the Gulf of Mexico.
The calmest period tends to be late summer.
From August to September, wind speeds drop to around 5 mph, creating a more stable and less breezy environment.
| Month | Average Wind Speed |
|---|---|
| January | 6 mph |
| February | 7 mph |
| March | 10 mph |
| April | 9 mph |
| May | 8 mph |
| June | 7 mph |
| July | 6 mph |
| August | 5 mph |
| September | 5 mph |
| October | 6 mph |
| November | 7 mph |
| December | 6 mph |
Average Air Quality In San Antonio, Texas
San Antonio generally enjoys good air quality throughout the year. The Air Quality Index (AQI) often falls into the “Good” range, with occasional fluctuations into the “Moderate” category during the spring and summer months.
In 2019, monthly averages ranged from AQI 25 (“Good”) in October to AQI 54 (“Moderate”) in May.
Spring and summer tend to see higher pollution levels compared to fall and winter.
| Month | AQI Range | Air Quality Description |
|---|---|---|
| October | 25 | Good |
| May | 54 | Moderate |
| June | Higher | Moderate |
| July | Higher | Moderate |
Residents and visitors can track the real-time air quality using resources like AccuWeather’s Air Quality Index, which helps in making healthier lifestyle decisions, especially for those with respiratory conditions.
IQAir provides detailed data on PM2.5 and PM10 particle pollution, which are significant pollutants in San Antonio.
This data is useful for understanding daily air quality and planning outdoor activities.
Tracking the air quality is crucial for visibility and health.
Poor air quality can reduce visibility and affect activities such as driving or outdoor events. Therefore, staying informed can help everyone enjoy San Antonio safely and comfortably.
Topography Of San Antonio, Texas
San Antonio lies in Bexar County at coordinates approximately 29.4241° N, 98.4936° W. The city’s terrain is varied, featuring flatlands, rolling hills, and even some rugged areas.
The average elevation of San Antonio is 810 feet above sea level. The minimum elevation in parts of the city is as low as 384 feet, while the highest terrain reaches up to 1,886 feet in elevation.
Elevation Table
| Elevation | Feet Above Sea Level |
|---|---|
| Average | 810 |
| Minimum | 384 |
| Maximum | 1,886 |
The topography impacts both weather and development in the city. Areas with higher elevations tend to have slightly cooler temperatures and more wind.
San Antonio’s different elevations also influence drainage and water flow, crucial for urban planning and agriculture.
Given its varied landscape, the city provides scenic views and interesting geological features.
San Antonio is about 75 miles southwest of Austin, which is the state capital. It is approximately 190 miles west of Houston. This positioning makes it a central hub in Texas, accessible from several key locations. For a visual perspective, the San Antonio topographic map can help.
Extreme Weather Events That Occur In San Antonio, Texas
San Antonio experiences a variety of extreme weather events.
Flooding: Floods are common due to intense rainfall. In January 2024, heavy rains led to severe flooding, affecting many areas. This event caused significant damage and highlighted the city’s vulnerability to such conditions.
Hailstorms: Hailstorms occasionally hit the area. For example, in April 2021, San Antonio experienced record hail, causing extensive property damage. Hailstones during this event were notably large.
Tornadoes: Although not frequent, tornadoes do occur. One of the significant tornado outbreaks included the January 2024 event, which caused widespread damage in several regions of Texas.
Hurricanes: San Antonio feels the impact of hurricanes, despite being inland. Hurricane Gilbert in September 1988 brought wind speeds up to 135 mph, causing severe damage as it made landfall. For more information, refer to the history of hurricanes in San Antonio.
Winter Storms: Winter storms are rare but can be severe. The February 2021 winter storm brought unprecedented cold, heavy snow, and ice, disrupting normal life. This storm caused significant property damage and power outages.
These events illustrate the range of extreme weather conditions that can occur in San Antonio, impacting residents and infrastructure. For more detailed accounts, see past weather events in the region.
Best Time Of The Year To Visit San Antonio, Texas
San Antonio offers a wide range of experiences throughout the year. The best time to visit depends on your preferences for weather, activities, and crowd levels.
What Is San Antonio, Texas Like In Spring
Spring in San Antonio, from February to April, is a pleasant time to visit.
Temperatures range from the high 60s to low 80s Fahrenheit.
This is also the time when the famous Fiesta San Antonio takes place in April, a vibrant event that showcases the city’s culture and history.
The spring months are less humid, making outdoor activities enjoyable.
Tourists can explore the River Walk, visit the Alamo, or take part in guided tours without dealing with the intense heat of summer.
What Is San Antonio, Texas Like In Summer
Summer in San Antonio, from May to August, is characterized by high temperatures and humidity.
Daily highs often reach between 85-95°F, especially in mid-July and August.
The city bustles with tourists during these months, despite the extreme heat.
Popular summer activities include water parks like Six Flags Fiesta Texas and tubing on the San Antonio River.
Staying hydrated and wearing sunscreen is crucial due to the intense sun.
Hotel rates tend to be higher due to the influx of visitors during the summer months.
What Is San Antonio, Texas Like In Fall
Fall, from September to October, brings milder temperatures and lower humidity.
This period is part of the tourism shoulder season, offering a balance of good weather and fewer crowds.
Temperatures range from the mid-70s to low 80s Fahrenheit.
The fall months are ideal for exploring outdoor attractions like the Botanical Garden or taking a scenic bike ride along the Mission Trail.
Festivals and events also take place during this time, adding to the charm of a fall visit.
What Is San Antonio, Texas Like In Winter
Winter in San Antonio lasts from November to January, with average high temperatures in the 60s Fahrenheit.
These months offer the most comfortable weather for outdoor activities and sightseeing.
The River Walk is beautifully lit during the holiday season, making it a picturesque destination.
Winter is also a great time for budget travelers, as hotel rates are generally lower.
Even in December and January, the mild temperatures allow for enjoyable visits to attractions like the Texas Hill Country.
San Antonio offers diverse experiences year-round. Each season provides unique opportunities tailored to different preferences, from mild winter days to festive spring events.