Climate Insights for San Antonio

The climate in San Antonio is hot. The average annual temperature is 25°C and approximately 2,104 mm of precipitation falls per year. San Antonio receives a notable amount of rainfall throughout the year, including during its driest month. San Antonio is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: May, April, September. The coldest months are January, February, March, when temperatures can drop to 22°C.The climate in San Antonio is hot. The average annual temperature is 78°F and approximately 82.8 in of precipitation falls per year. San Antonio receives a notable amount of rainfall throughout the year, including during its driest month. San Antonio is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: May, April, September. The coldest months are January, February, March, when temperatures can drop to 71°F.

San Antonio has relatively stable temperatures year-round, staying within a 9°C range. The warmest month is May, when average highs reach 31°C and the mean temperature sits around 27°C. January is the coolest month, with minimum temperatures around 22°C and an average of 24°C. Daily temperature variation is modest, with an average difference of 7°C between highs and lows.San Antonio has relatively stable temperatures year-round, staying within a 17°F range. The warmest month is May, when average highs reach 88°F and the mean temperature sits around 80°F. January is the coolest month, with minimum temperatures around 71°F and an average of 75°F. Daily temperature variation is modest, with an average difference of 12°F between highs and lows.

San Antonio is a very wet location, receiving approximately 2,104 mm of precipitation annually, which averages out to around 175 mm per month. The wettest month is October, averaging 320 mm of rainfall. June and September also tend to see above-average precipitation. The driest month is March, with just 51 mm. That's 269 mm less than October, the wettest month. Rainfall is heavily concentrated in certain months, creating a distinct wet and dry season. Visitors should plan around these patterns, as the difference between peak and low months is dramatic.San Antonio is a very wet location, receiving approximately 82.8 in of precipitation annually, which averages out to around 6.9 in per month. The wettest month is October, averaging 12.6 in of rainfall. June and September also tend to see above-average precipitation. The driest month is March, with just 2 in. That's 10.6 in less than October, the wettest month. Rainfall is heavily concentrated in certain months, creating a distinct wet and dry season. Visitors should plan around these patterns, as the difference between peak and low months is dramatic.

San Antonio is relatively calm, with an average annual wind speed of 10km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is February, averaging 13km/h, though still comfortable for most outdoor activities. The calmest conditions occur in October, with average winds dropping to 7km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 6km/h gap between the calmest and windiest months. Wind tends to be stronger during winter months, driven by seasonal pressure systems. The seasonal averages break down to 13km/h in winter, 11km/h in spring, 9km/h in summer, 8km/h in autumn.San Antonio is mildly breezy, with an average annual wind speed of 6mph. For context, sustained winds below 7mph are generally light, while anything above 16mph is considered strong. The windiest month is February, averaging 8mph, noticeable enough to affect lighter outdoor activities. The calmest conditions occur in October, with average winds dropping to 4mph, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 4mph gap between the calmest and windiest months. Wind tends to be stronger during winter months, driven by seasonal pressure systems. The seasonal averages break down to 8mph in winter, 7mph in spring, 6mph in summer, 5mph in autumn.

The best time to visit San Antonio is during January and February, when the weather is most comfortable for travellers. During these months, average temperatures hover around 24°C with modest rainfall averaging 65 mm per month. By contrast, May can be uncomfortably hot with temperatures reaching 31°C. A light rain jacket is recommended, though showers are generally brief and shouldn't disrupt your plans.The best time to visit San Antonio is during January and February, when the weather is most comfortable for travellers. During these months, average temperatures hover around 76°F with modest rainfall averaging 2.6 in per month. By contrast, May can be uncomfortably hot with temperatures reaching 88°F. A light rain jacket is recommended, though showers are generally brief and shouldn't disrupt your plans.

The table below shows monthly climate averages for San Antonio based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.The table below shows monthly climate averages for San Antonio based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Fahrenheit (°F). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Wind speed is the average sustained speed in miles per hour (mph). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.