San Antonio, Texas, is a year-round destination known for its rich history, vibrant culture, and warm hospitality. From the iconic River Walk to the Alamo and lively festivals, the city offers something in every season. However, understanding San Antonio weather by month can help you plan the perfect trip—whether you want sunshine, fewer crowds, or festival vibes.
Below is a complete month-by-month weather guide designed especially for travelers.
Overview of San Antonio’s Climate
San Antonio has a humid subtropical climate, characterized by:
- Hot summers
- Mild winters
- Short spring and fall seasons
- Occasional heavy rain, mainly in late spring and early fall
Snow is extremely rare, and sunshine is plentiful throughout the year.
San Antonio Weather by Month
| Month | Avg High | Avg Low | Rainfall | Weather Summary |
|---|---|---|---|---|
| January | 62°F (17°C) | 40°F (4°C) | Low | Cool, mild, and sunny |
| February | 66°F (19°C) | 43°F (6°C) | Low | Comfortable winter weather |
| March | 73°F (23°C) | 49°F (9°C) | Moderate | Warm spring begins |
| April | 80°F (27°C) | 56°F (13°C) | Moderate | Warm, festive, occasional rain |
| May | 86°F (30°C) | 64°F (18°C) | High | Hotter with thunderstorms |
| June | 93°F (34°C) | 71°F (22°C) | Low | Hot and sunny |
| July | 96°F (36°C) | 73°F (23°C) | Very Low | Extremely hot |
| August | 97°F (36°C) | 74°F (23°C) | Low | Peak summer heat |
| September | 90°F (32°C) | 69°F (21°C) | Moderate | Hot, slowly cooling |
| October | 82°F (28°C) | 58°F (14°C) | Low | Ideal fall weather |
| November | 72°F (22°C) | 49°F (9°C) | Low | Mild and comfortable |
| December | 64°F (18°C) | 41°F (5°C) | Low | Cool, festive season |
January: Cool and Comfortable
- Average high: ~62°F (17°C)
- Average low: ~40°F (4°C)
January is one of the coolest months in San Antonio. Days are generally sunny and mild, while evenings can feel chilly. It’s a great time for sightseeing without crowds, especially at outdoor attractions like the Alamo.
Best for: Budget travelers, walking tours, history lovers
February: Mild Winter Vibes
- Average high: ~66°F (19°C)
- Average low: ~43°F (6°C)
February remains cool but pleasant. Occasional cold fronts may bring brief temperature drops, but overall it’s comfortable for exploring the city.
Best for: Romantic getaways, relaxed city exploration
March: Spring Begins
- Average high: ~73°F (23°C)
- Average low: ~49°F (9°C)
Spring arrives in March, bringing warmer temperatures and blooming wildflowers. Rainfall increases slightly, but it’s still one of the best months to visit.
Best for: Outdoor activities, festivals, photography
April: Warm and Colorful
- Average high: ~80°F (27°C)
- Average low: ~56°F (13°C)
April is a favorite among travelers. The weather is warm but not hot, and the city hosts major events like Fiesta San Antonio. Expect occasional rain showers.
Best for: Festivals, River Walk cruises, first-time visitors
May: Hotter with More Rain
- Average high: ~86°F (30°C)
- Average low: ~64°F (18°C)
May marks the transition toward summer. Temperatures rise, and rainfall peaks, sometimes with thunderstorms. Despite this, it’s still a popular travel month.
Best for: Cultural events, food lovers, spring travelers
June: Summer Heat Arrives
- Average high: ~93°F (34°C)
- Average low: ~71°F (22°C)
June is hot and sunny. Rain decreases, but humidity increases. Outdoor activities are best enjoyed in the morning or evening.
Best for: Family vacations, water parks, indoor attractions
July: Hottest Month of the Year
- Average high: ~96°F (36°C)
- Average low: ~73°F (23°C)
July is extremely hot, with long sunny days and little rain. Staying hydrated and planning indoor breaks is essential.
Best for: Heat lovers, summer sales, night activities
August: Peak Summer Conditions
- Average high: ~97°F (36°C)
- Average low: ~74°F (23°C)
August feels similar to July—hot, humid, and intense. Crowds thin slightly due to the heat, which can mean better hotel deals.
Best for: Budget travelers who can handle high temperatures
September: Gradual Cool-Down
- Average high: ~90°F (32°C)
- Average low: ~69°F (21°C)
September starts hot but slowly cools down. Rainfall may increase due to tropical systems, but severe weather is uncommon.
Best for: Fewer crowds, early fall trips
October: Ideal Fall Weather
- Average high: ~82°F (28°C)
- Average low: ~58°F (14°C)
October is one of the best months to visit San Antonio. The weather is warm, dry, and comfortable, perfect for outdoor dining and sightseeing.
Best for: Outdoor lovers, couples, festivals
November: Mild and Relaxing
- Average high: ~72°F (22°C)
- Average low: ~49°F (9°C)
November brings cooler temperatures and low humidity. It’s a peaceful time to visit before the holiday season.
Best for: Quiet travel, cultural attractions
December: Cool Holiday Season
- Average high: ~64°F (18°C)
- Average low: ~41°F (5°C)
December is mild compared to most U.S. cities. Holiday lights along the River Walk create a festive atmosphere, and outdoor activities are still enjoyable.
Best for: Holiday travel, winter sun seekers
Best Time to Visit San Antonio
- Best overall weather: March–April and October
- Best budget months: January, February, August
- Best for festivals: April and October
- Best for avoiding crowds: Winter months (excluding holidays)
Frequently Asked Questions About San Antonio Weather
- What is the best month to visit San Antonio for good weather?
March, April, and October offer the most comfortable temperatures with low humidity and minimal rain. - What is the hottest month in San Antonio?
August is typically the hottest month, with daytime temperatures often reaching 97°F (36°C). - What is the coldest month in San Antonio?
January is the coldest month, though temperatures are still relatively mild compared to most U.S. cities. - Does San Antonio get snow?
Snow is extremely rare in San Antonio and usually occurs only once every several years. - Is San Antonio hot year-round?
San Antonio is warm most of the year, but winter months are mild and comfortable rather than hot. - When does summer start in San Antonio?
Summer-like heat usually begins in late May and lasts through September. - What months have the most rain in San Antonio?
May and September typically receive the highest rainfall. - Is San Antonio humid?
Yes, especially during summer months when humidity levels are noticeably higher. - What is the best time to visit San Antonio on a budget?
January, February, and August often have lower hotel prices and fewer tourists. - Is October a good time to visit San Antonio?
Yes, October is one of the best months due to warm temperatures, low humidity, and pleasant evenings. - What should I wear in San Antonio in summer?
Lightweight, breathable clothing, sunscreen, sunglasses, and comfortable walking shoes are recommended. - Do I need a jacket in San Antonio?
A light jacket is useful during winter evenings and early mornings in fall and spring. - Is San Antonio weather good for outdoor activities?
Yes, especially from March to April and October to November. - Can you walk the River Walk year-round?
Yes, but spring and fall are the most comfortable seasons for walking the River Walk. - Does San Antonio experience extreme weather?
Severe weather is uncommon, though thunderstorms may occur in spring and early fall. - Is July a good time to visit San Antonio?
July is very hot, but it’s suitable if you don’t mind high temperatures and plan indoor activities. - What is the average temperature in San Antonio in winter?
Winter daytime temperatures usually range from 60°F to 70°F (15°C–21°C). - How hot does San Antonio get in summer?
Summer temperatures often exceed 95°F (35°C), especially in July and August. - Is spring a good season to visit San Antonio?
Yes, spring offers warm temperatures, blooming landscapes, and popular festivals. - What month has the least crowds in San Antonio?
January and February typically have the fewest tourists outside of holiday periods.
Final Tips for Travelers
- Pack light, breathable clothing for spring and summer.
- Bring a light jacket for winter evenings.
- Stay hydrated during summer months.
- Check the forecast during spring for possible rainstorms.
Conclusion
Understanding San Antonio weather by month helps you choose the perfect time to visit based on your travel style. Whether you’re chasing festivals, mild temperatures, or travel deals, San Antonio offers a welcoming climate and unforgettable experiences all year long.