Climate Insights for San Antonio

The climate in San Antonio is hot. The average annual temperature is 25°C and approximately 1,221 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, August. The coldest months are January, December, February, when temperatures can drop to 19°C.The climate in San Antonio is hot. The average annual temperature is 77°F and approximately 48.1 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, August. The coldest months are January, December, February, when temperatures can drop to 66°F.

San Antonio sees moderate temperature variation throughout the year, ranging from 19°C to 33°C. The warmest month is May, when average highs reach 33°C and the mean temperature sits around 28°C. January is the coolest month, with minimum temperatures around 19°C and an average of 22°C. On average, daily temperatures fluctuate by about 9°C between overnight lows and afternoon highs.San Antonio sees moderate temperature variation throughout the year, ranging from 66°F to 92°F. The warmest month is May, when average highs reach 92°F and the mean temperature sits around 82°F. January is the coolest month, with minimum temperatures around 66°F and an average of 72°F. On average, daily temperatures fluctuate by about 16°F between overnight lows and afternoon highs.

San Antonio is a fairly wet location, receiving approximately 1,221 mm of precipitation annually, which averages out to around 102 mm per month. The wettest month is September, averaging 178 mm of rainfall. October and June also tend to see above-average precipitation. The driest month is March, with just 37 mm. That's 142 mm less than September, the wettest month. Precipitation varies noticeably between seasons, with the second half (July to December) of the year generally seeing more rainfall.San Antonio is a fairly wet location, receiving approximately 48.1 in of precipitation annually, which averages out to around 4 in per month. The wettest month is September, averaging 7 in of rainfall. October and June also tend to see above-average precipitation. The driest month is March, with just 1.5 in. That's 5.6 in less than September, the wettest month. Precipitation varies noticeably between seasons, with the second half (July to December) of the year generally seeing more rainfall.

San Antonio is relatively calm, with an average annual wind speed of 9km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is July, averaging 10km/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 3km/h gap between the calmest and windiest months.San Antonio is mildly breezy, with an average annual wind speed of 5mph. For context, sustained winds below 7mph are generally light, while anything above 16mph is considered strong. The windiest month is July, averaging 6mph, though still comfortable for most 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 2mph gap between the calmest and windiest months.

The best time to visit San Antonio is during January, February, March and December, when the weather is most comfortable for travellers. During these months, average temperatures hover around 23°C with modest rainfall averaging 53 mm per month. By contrast, May can be uncomfortably hot with temperatures reaching 33°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, February, March and December, when the weather is most comfortable for travellers. During these months, average temperatures hover around 74°F with modest rainfall averaging 2.1 in per month. By contrast, May can be uncomfortably hot with temperatures reaching 92°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.