Climate Insights for San Antonio

The climate in San Antonio is warm and mild. The average annual temperature is 19°C and approximately 449 mm of precipitation falls per year. January is the wettest month, receiving around 98 mm of rainfall. San Antonio is in the Southern Hemisphere. The seasons are reversed: summer runs from December to February, while winter falls between June and August. The summer months are: December, January, February. The coldest months are July, June, August, when temperatures can drop to 5°C.The climate in San Antonio is warm and mild. The average annual temperature is 67°F and approximately 17.7 in of precipitation falls per year. January is the wettest month, receiving around 3.9 in of rainfall. San Antonio is in the Southern Hemisphere. The seasons are reversed: summer runs from December to February, while winter falls between June and August. The summer months are: December, January, February. The coldest months are July, June, August, when temperatures can drop to 41°F.

Temperatures in San Antonio vary considerably across the year, with a 29°C difference between the coldest and warmest months. The warmest month is December, when average highs reach 34°C and the mean temperature sits around 27°C. July is the coolest month, with minimum temperatures around 5°C and an average of 10°C. On average, daily temperatures fluctuate by about 12°C between overnight lows and afternoon highs. The sharpest temperature change occurs between April and May, with a 5°C shift in average temperatures.Temperatures in San Antonio vary considerably across the year, with a 52°F difference between the coldest and warmest months. The warmest month is December, when average highs reach 93°F and the mean temperature sits around 80°F. July is the coolest month, with minimum temperatures around 41°F and an average of 50°F. On average, daily temperatures fluctuate by about 22°F between overnight lows and afternoon highs. The sharpest temperature change occurs between April and May, with a 8°F shift in average temperatures.

San Antonio is a relatively dry area, receiving approximately 449 mm of precipitation annually, which averages out to around 37 mm per month. The wettest month is January, averaging 98 mm of rainfall. February and March also tend to see above-average precipitation. The driest month is July, with just 3 mm. That's 95 mm less than January, 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 relatively dry area, receiving approximately 17.7 in of precipitation annually, which averages out to around 1.5 in per month. The wettest month is January, averaging 3.9 in of rainfall. February and March also tend to see above-average precipitation. The driest month is July, with just 0.1 in. That's 3.7 in less than January, 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 mildly breezy, with an average annual wind speed of 17km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is November, averaging 20km/h, noticeable enough to affect lighter outdoor activities. The calmest conditions occur in May, with average winds dropping to 15km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 5km/h between the calmest and windiest months.San Antonio is moderately windy, with an average annual wind speed of 11mph. For context, sustained winds below 7mph are generally light, while anything above 16mph is considered strong. The windiest month is November, averaging 12mph, which can feel quite blustery and may affect outdoor activities. The calmest conditions occur in May, with average winds dropping to 9mph, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 3mph between the calmest and windiest months.

The best time to visit San Antonio is during March, April, September, October and November, when the weather is most comfortable for travellers. During these months, average temperatures hover around 21°C with modest rainfall averaging 39 mm per month. By contrast, December can be uncomfortably hot with highs reaching 34°C, while July is the coldest period with lows dropping to 5°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 March, April, September, October and November, when the weather is most comfortable for travellers. During these months, average temperatures hover around 69°F with modest rainfall averaging 1.5 in per month. By contrast, December can be uncomfortably hot with highs reaching 93°F, while July is the coldest period with lows dropping to 41°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.