Our verdict
The best time to visit San Antonio is November
In summer, the average maximum temperature is around 36℃ (97℉), but temperatures can sometimes reach as high as 37℃ (99℉) on the hottest days of the year. The weather in the winter, especially around January, can reach a minimum of 4℃ (40℉).
If you’re a sun-chaser and want to visit San Antonio when the days are longest, you should visit in July. On average it rains the most days in May, making it the wettest month of the year. Although it’s the wet season, it can often rain a little bit during the day or evening but have fine weather for a majority of the day too, so don’t let this put you off.
Keep reading to find out more detailed information about the seasons and climate in San Antonio, as well as our favourite tools to help you find the best options for transport, accommodation, and much more.
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San Antonio seasons
Before you continue, it’s important to know when the seasons are in San Antonio as they might be different to yours depending on where in the world you’re travelling from. San Antonio is in the Northern Hemisphere, so the seasons fall during these months:
| Season | Months |
|---|---|
| Summer | June to August |
| Autumn/fall | September to November |
| Winter | December to February |
| Spring | March to May |
Average temperatures in San Antonio
If the temperature is a big factor for you to help you decide when to visit, the chart below shows the average minimum and maximum temperatures in San Antonio for each month side-by-side so you can easily see the difference in weather throughout the year. To see the temperatures in both Celsius (°C) and Fahrenheit (°F), hover or tap the shaded boxes on the graph.
San Antonio climate by month
If you already have a rough idea about which months you might want to travel, the section below shows a detailed breakdown of the climate in San Antonio for each month so you can see if it all suits your wants and needs. Scroll down, or use the quick menu below to jump to your preferred month.
Jump to:
San Antonio in January
- Average temperature: 11℃ (52℉)
- Average high temperature: 16℃ (62℉)
- Average low temperature: 7℃ (45℉)
- Average humidity: 64%
- Average sunny days: 20 days
- Average rainfall: 29mm (1") over 9 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to San Antonio in January, make sure you pack a warm jacket or coat.
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San Antonio in February
- Average temperature: 13℃ (56℉)
- Average high temperature: 19℃ (66℉)
- Average low temperature: 9℃ (48℉)
- Average humidity: 68%
- Average sunny days: 15 days
- Average rainfall: 25mm (1") over 11 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to San Antonio in February, make sure you pack a warm jacket or coat.
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San Antonio in March
- Average temperature: 17℃ (63℉)
- Average high temperature: 23℃ (73℉)
- Average low temperature: 12℃ (54℉)
- Average humidity: 71%
- Average sunny days: 14 days
- Average rainfall: 39mm (2") over 14 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to San Antonio in March, make sure you pack a light jumper or hoodie for the evenings and some light clothes for the daytime.
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San Antonio in April
- Average temperature: 21℃ (69℉)
- Average high temperature: 27℃ (80℉)
- Average low temperature: 16℃ (60℉)
- Average humidity: 70%
- Average sunny days: 13 days
- Average rainfall: 47mm (2") over 15 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to San Antonio in April, make sure you pack t-shirts for the daytime and maybe a light jumper for the evenings as it cools down a bit.
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San Antonio in May
- Average temperature: 24℃ (76℉)
- Average high temperature: 30℃ (86℉)
- Average low temperature: 20℃ (67℉)
- Average humidity: 73%
- Average sunny days: 12 days
- Average rainfall: 93mm (4") over 16 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to San Antonio in May, make sure you pack t-shirts for the daytime and maybe a light jumper for the evenings as it cools down a bit.
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San Antonio in June
- Average temperature: 28℃ (82℉)
- Average high temperature: 34℃ (92℉)
- Average low temperature: 23℃ (73℉)
- Average humidity: 70%
- Average sunny days: 15 days
- Average rainfall: 41mm (2") over 12 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to San Antonio in June, make sure you pack t-shirts and shorts.. It stays pretty warm most of the time.
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San Antonio in July
- Average temperature: 29℃ (84℉)
- Average high temperature: 35℃ (95℉)
- Average low temperature: 24℃ (75℉)
- Average humidity: 64%
- Average sunny days: 19 days
- Average rainfall: 40mm (2") over 10 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to San Antonio in July, make sure you pack t-shirts, shorts and sun protection.
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San Antonio in August
- Average temperature: 30℃ (86℉)
- Average high temperature: 36℃ (97℉)
- Average low temperature: 24℃ (76℉)
- Average humidity: 59%
- Average sunny days: 20 days
- Average rainfall: 36mm (1") over 9 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to San Antonio in August, make sure you pack t-shirts, shorts and sun protection.
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San Antonio in September
- Average temperature: 27℃ (80℉)
- Average high temperature: 32℃ (89℉)
- Average low temperature: 22℃ (72℉)
- Average humidity: 66%
- Average sunny days: 12 days
- Average rainfall: 86mm (3") over 17 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to San Antonio in September, make sure you pack t-shirts and shorts.. It stays pretty warm most of the time.
San Antonio in October
- Average temperature: 22℃ (71℉)
- Average high temperature: 27℃ (81℉)
- Average low temperature: 17℃ (63℉)
- Average humidity: 66%
- Average sunny days: 18 days
- Average rainfall: 68mm (3") over 10 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to San Antonio in October, make sure you pack t-shirts for the daytime and maybe a light jumper for the evenings as it cools down a bit.
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San Antonio in November
- Average temperature: 16℃ (61℉)
- Average high temperature: 21℃ (70℉)
- Average low temperature: 12℃ (53℉)
- Average humidity: 69%
- Average sunny days: 18 days
- Average rainfall: 27mm (1") over 9 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to San Antonio in November, make sure you pack a coat or jumper for the evenings and some light clothes for the daytime.
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San Antonio in December
- Average temperature: 12℃ (54℉)
- Average high temperature: 17℃ (62℉)
- Average low temperature: 8℃ (47℉)
- Average humidity: 69%
- Average sunny days: 19 days
- Average rainfall: 28mm (1") over 10 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to San Antonio in December, make sure you pack a warm jacket or coat.
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