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When is the best time to visit San Antonio?
In general the best time to visit San Antonio is probably August, when the weather is usually great. The hottest months are June, July, August, while the coldest months are January, February, December.
Depending on the activities you want to experience, you may choose different months to visit:
- The best time for a sunbathing holiday is June, July, August. Average maximum temperatures are up to +36°C in August and it has 10 sunny days on average.
- In general, it’s pleasant to walk and do outdoor activities during January - December.
- If you want to avoid wet weather, then your choice is May, November, December with the lowest chance of rain.
Average weather in San Antonio in different months
This is the average weather in San Antonio for each month based on historic data:
January, February, March, April, May, September, October, November, December usually has good weather. Average maximum temperature reaches +33°C during September.
In June, July, August the weather is average. Expect around 38 rainy days, and the precipitation amounts to approximately 89 mm in June.
Climate in San Antonio
Here is the detailed breakdown of the climate in San Antonio for each month:
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Maximum Temperature | |||||||||||
| +30°C | +37°C | +36°C | +38°C | +39°C | +43°C | +42°C | +43°C | +43°C | +36°C | +34°C | +30°C |
| Average Maximum Temperature | |||||||||||
| +18°C | +20°C | +24°C | +28°C | +31°C | +34°C | +35°C | +36°C | +33°C | +28°C | +23°C | +19°C |
| Minimum Temperature | |||||||||||
| -9°C | -12°C | -5°C | 0°C | +6°C | +14°C | +17°C | +18°C | +9°C | -1°C | -4°C | -13°C |
| Avg. water temperature | |||||||||||
| - | - | - | - | - | - | - | - | - | - | - | - |
| Humidity, % | |||||||||||
| 70 | 70 | 69 | 69 | 73 | 71 | 68 | 65 | 68 | 70 | 71 | 71 |
| Rain, mm | |||||||||||
| 49 | 51 | 73 | 76 | 132 | 89 | 65 | 55 | 91 | 87 | 67 | 53 |
| Snow, mm | |||||||||||
| 3 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Average wind speed, m/s | |||||||||||
| 3 | 3 | 3 | 4 | 4 | 3 | 3 | 3 | 3 | 3 | 3 | 3 |
| Sunny Days | |||||||||||
| 10 | 8 | 8 | 8 | 5 | 6 | 9 | 10 | 10 | 11 | 10 | 10 |
| Cloud Days | |||||||||||
| 9 | 9 | 9 | 8 | 8 | 8 | 8 | 8 | 5 | 8 | 9 | 9 |
| Rainy Days | |||||||||||
| 11 | 11 | 14 | 13 | 16 | 14 | 12 | 12 | 13 | 11 | 12 | 11 |
| Snowy Days | |||||||||||
| 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Average Temperature
Here are the average maximum and minimum temperatures in San Antonio during the whole year:
The hottest month in San Antonio is August with average maximum temperature going up to +36°C. The coldest month is January with the lowest temperatures of +6°C.
Humidity
The temperature feels different depending on humidity. Here is how humidity in San Antonio looks throughout the year, in %:
The most humid month in San Antonio is May with average humidity going up to 73%. The least humid month is August with an average humidity of 65%.
Rain
Amount of rainfall in mm. in San Antonio during the whole year based on historical data:
The sunniest and driest month is October with approximately 11 sunny days and a total precipitation of around 87 mm. The rainiest and wettest month is May with approximately 16 rainy days and 132 mm of total precipitation.
Snow
Amount of snow in mm. in San Antonio during the whole year based on historical data:
The snowiest month is January with approximately 1 snowy days.
FAQ
Frequently asked questions about the weather in San Antonio:
What is the hottest month in San Antonio?
The hottest month in San Antonio is August with average maximum temperature of +36°C.
What is the coldest month in San Antonio?
The coldest month in San Antonio is January with minimum temperatures of +6°C.
Is San Antonio worth visiting in winter?
If you are planning to visit San Antonio in winter you can expect pretty good weather. The best month is August with +36°C and 10 sunny days.
When does it rain the least in San Antonio?
if you're looking to visit San Antonio when it rains the least, you should plan your trip for May, September, June. During this time, rainfall is rare with the driest month being January with only 49 mm of rain.
Other cities in USA
Check out the weather for other cities in USA.
Monthly weather in San Antonio
Source of the data
For this page, we’ve looked at the typical weather in San Antonio, based on historical hourly weather data from January 1, 1979, to December 31, 2022.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.