
There's a lot to know about the San Antonio climate! San Antonio is the seventh-largest city in the country, with a population of 1,434,625. San Antonio Texas is located in South Texas, over 150 miles from the ocean, so it's in a relatively dry, flat, and warm area.
The San Antonio climate type is transitional humid subtropical. This means the city has very hot and humid summers with mild winters. Many residents start moving to San Antonio partly due to the warm and pleasant weather year-round. Ask a local, "What is the weather like in San Antonio Texas?" and they'll tell you it's pleasant.
However, you shouldn't start moving to San Antonio just yet. San Antonio weather is short-term changes in the atmosphere, while San Antonio climate is long-term phenomena and predictions about the weather. If you want to make the most of the weather and climate in San Antonio, you need to research both. Here's what to know about San Antonio weather year-round, including San Antonio average temperatures.
The San Antonio Texas climate has four distinct seasons, though sunshine remains consistent throughout the year. Summers are warm and humid, winters are cool and short, and falls, and autumns are mild with some rain and cloudy days. San Antonio can experience hurricanes, and its hurricane season is between June 1 and November 30. San Antonio's tornado season occurs between April and June, though tornadoes can occasionally occur outside the season.
Information about the weather in San Antonio is easier to understand if you break the details down by season. Here's what to know about San Antonio weather by season, including San Antonio weather averages.
When does spring begin in San Antonio? Spring in San Antonio begins in late February and ends in late May. Temperatures rise steadily through the spring in San Antonio. Between the start of March and the end of May, the average high temperature rises from 72 degrees to 90 degrees. The average low temperature for the San Antonio climate rises from 51 degrees to 72 degrees.
Flowers start blooming in February, but the peak season for blooming wildflowers is April. Roughly 60% of days in the spring are clear, mostly clear, and partly cloudy. Spring is not the San Antonio rainy season, despite most people associating the spring with rain. 7.6 inches of rain on average fall during the spring in San Antonio.

Spring is also a peak season for public events in San Antonio. Fiesta San Antonio is an outdoor cultural festival with parades, live music performances, food and drink vendors, and other special treats. It takes place every year in April, attracting thousands of visitors from outside the city.
San Antonio summer weather begins in late May and ends in mid-September. Summer is the hottest season of the year, with August being the hottest month. The average high temperature remains above 90 degrees, and the average low remains above 70 throughout the entire summer. Temperatures peak in early August and start to decline, though only by a few degrees over the next month and a half.
The summer is the clearest month in San Antonio, with roughly two-thirds of days being clear, mostly clear, or partly cloudy. The summer is the rainy season in San Antonio, with roughly 8.0 inches of rain falling during the summer.
Is San Antonio humid or dry? San Antonio is humid throughout the entire summer, and the San Antonio average humidity is higher than in other cities. Almost all summer days have humidity, and over three-quarters of days feel muggy, oppressive, or miserable. Humidity in the San Antonio climate can make outdoor activities difficult and contribute to health problems like heat exhaustion.
The high average humidity in San Antonio means there are fewer major events in the summer than in the spring. However, you can go swimming at 24 different public swimming pools in San Antonio. Many 55+ communities in San Antonio offer free rides to public swimming pools. You can beat the heat by riding on water slides at Aquatica San Antonio and Six Flags Fiesta Texas.
When does fall start in San Antonio? Fall in San Antonio begins in mid-September and ends in late November. Between the start of September and the end of November, the average high declines from 93 degrees to 69, and the average low declines from 74 to 49. Humidity levels drop steadily throughout the autumn, though roughly 30% of days in November feel humid, oppressive, and miserable. The San Antonio climate in the fall can be rainy, with an average rainfall in San Antonio of 6.2 inches, including 2.9 inches in October.
Peak foliage occurs in mid-to-late November. Many San Antonio residents spend time on Thanksgiving weekend in places like Brackenridge Park and McAllister Park, looking at the leaves and enjoying the mild weather. You can attend various cultural celebrations in the autumn, including Oktoberfest, Dia de los Muertos, and DiwaliSA.
When does winter start in San Antonio TX? Winter in San Antonio begins in late November and ends in late February. Winter is the cloudiest season, with nearly half of days being overcast and mostly cloudy. Despite the clouds, winter is relatively dry, with only 4.6 inches of average rainfall. How cold does San Antonio get? January is the coldest month, but the average temperature in San Antonio in January is 52 degrees and its average low is 43, so you won't experience freezing rain or snow.
Compare the San Antonio climate to other cities, and you'll find that San Antonio Texas winter weather is relatively pleasant and mild. The average winter temperature in San Antonio Texas remains above 50 degrees.

Does it snow in San Antonio? No! San Antonio Texas winter weather is mild enough that you can enjoy San Antonio winter activities in the outdoors. Historic attractions like the Alamo are open, and many of them have special events like tree lightings in December. One of the most popular things to do in San Antonio in winter is shopping, with shopping centers like Market Square having special booths and stores around Christmastime.
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Breaking down the San Antonio weather monthly can give you detailed information about the weather in San Antonio and help you plan fun things to do. Here's the San Antonio weather by month, including the San Antonio temperature by month and San Antonio humidity by month.
What is the coldest month in San Antonio Texas? January is the coldest month of the year in San Antonio Texas. January is also one of the driest months in San Antonio, with no snowfall and only a few modest rain showers. Despite the dry San Antonio weather in January, it's the cloudiest month in the San Antonio climate, with 55% cloudy days. The most popular thing to do in January is the San Antonio Symphony Winter Festival, which offers musical performances from local musicians.
San Antonio weather in February is slightly warmer than in January, and temperatures steadily increase during the month. February is tied with January as the driest month in San Antonio, with 1.5 inches of rain and no snowfall. The San Antonio Stock Show and Rodeo starts performing in February and usually has a festival with live music and vendors in February.
March is a mild month in the Alamo City, with a moderate amount of rainfall and cloudy days. Temperatures in the San Antonio climate continue to warm up at a steady rate throughout the month. People start to visit San Antonio in March, especially for the St. Patrick's Day Parade on the River Walk.
April is when temperatures get warmer, to the point that you can start wearing short sleeved shirts and shorts. Fiesta San Antonio occurs in mid April on sunny and cloudy days.
May is the wettest month in San Antonio, with 3.5 inches of rain and 9.2 days of precipitation. Humidity levels rise significantly during the month, with over half of the days feeling muggy, oppressive, and miserable. Various cultural festivals occur in May, including the Pan-African Cultural Festival.
June is the month with the most sunshine, with 71% clear, mostly clear, and partly cloudy days. Nearly all days in June are humid, making outdoor activities difficult, and you may want to bring an umbrella as San Antonio weather in June can be rainy. If you want to go outside, you can attend Juneteenth San Antonio celebrations.
July is the most humid month, with 27.1 muggy, oppressive, and miserable days. July is a hot month, though temperatures continue to increase into August, so you should wear light clothes when you're going outside. You can attend July 4th celebrations at Woodlawn Lake and watch fireworks shows.
August is the warmest month, with temperatures peaking in early August. It's a very humid month, and it's one of the cloudiest months, with 44% cloudy days. August does not have many notable things to do due to the high temperatures and humidity.
Temperatures start to cool off in September, yet conditions are still warm enough that you don't need a coat or a jacket. Humidity levels remain high, with most days feeling very humid. Fotoseptiembre is an annual photography and arts festival in San Antonio that takes place every September.

Temperatures are cool enough in October that you may need to wear a long-sleeved shirt or a light jacket, especially in the early morning or night. October is a rainy month, and you may need to bring a rain jacket or an umbrella on any given day. However, San Antonio weather in October is fairly sunny, with 71% clear, mostly clear, and partly cloudy days. Halloween-related events are very popular in October, including Howl-O-Scream and Fright Fest.
Humidity levels drop off significantly during November, and the temperatures can get cold at night. San Antonio weather in November is mostly clear, though rain showers can occur on occasion. The San Antonio Auto and Truck Show is a kid-friendly auto show that occurs in November.
Temperatures are cold enough that most residents wear long-sleeved shirts, pants, and light coats while outside. The skies get cloudier during December, though most days remain clear or mostly clear. December is one of the best months for things to do in San Antonio, largely due to the mild San Antonio weather. You can find winter-themed events throughout the city, including ice skating at Travis Park Ice Rink.
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San Antonio does not experience extreme San Antonio weather on a regular basis. The most common form of severe weather in the city is high heat. The heat index can exceed 100 degrees during July and August, creating health problems like heat exhaustion and heat stroke. The Environmental Protection Agency found in 2024 that heat waves in San Antonio have gotten longer and more severe over the last 60 years. Heat waves were 1.6 days longer in 2023 than they were in 1961. The San Antonio climate will likely be more severe over time due to climate change.
Thunderstorms occur several times during the summer, though most last only a few minutes. Storms can create high rainfall and winds that can lead to power outages and toppled trees, so avoid going outside. San Antonio occasionally experiences tropical storms and hurricanes, though it has not experienced a major hurricane in decades. The climate in San Antonio is relatively mild year-round.
October is the best month to visit San Antonio and enjoy the pleasant climate in San Antonio for most people. It is one of the clearest months, has relatively low humid levels, and has mild temperatures. You can find many unique and exciting things to do in the best neighborhoods in San Antonio, most of which are outdoor activities. You won't need to wear a heavy jacket or windbreaker to enjoy the San Antonio weather in October.
The San Antonio climate is quite pleasant! Summers can be hot and humid, with heat waves occurring every year. However, springs, autumns, and winters are mild and comfortable for most people, with fun things to do occurring throughout the year.If the weather in San Antonio sounds perfect, you should start moving to San Antonio right away. Chapa's Moving Service has the best San Antonio movers, having received over 30 customer service awards. Call us for a free estimate now.