Climate Insights for San Antonio

The climate in San Antonio is warm and mild. The average annual temperature is 23°C and approximately 1,384 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 Southern Hemisphere. The seasons are reversed: summer runs from December to February, while winter falls between June and August. The summer months are: January, February, December. The coldest months are July, June, August, when temperatures can drop to 13°C.The climate in San Antonio is warm and mild. The average annual temperature is 74°F and approximately 54.5 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 Southern Hemisphere. The seasons are reversed: summer runs from December to February, while winter falls between June and August. The summer months are: January, February, December. The coldest months are July, June, August, when temperatures can drop to 56°F.

Temperatures in San Antonio vary considerably across the year, with a 21°C difference between the coldest and warmest months. The warmest month is January, when average highs reach 34°C and the mean temperature sits around 28°C. July is the coolest month, with minimum temperatures around 13°C and an average of 18°C. On average, daily temperatures fluctuate by about 10°C between overnight lows and afternoon highs. The sharpest temperature change occurs between April and May, with a 4°C shift in average temperatures.San Antonio sees moderate temperature variation throughout the year, ranging from 56°F to 92°F. The warmest month is January, when average highs reach 92°F and the mean temperature sits around 83°F. July is the coolest month, with minimum temperatures around 56°F and an average of 64°F. On average, daily temperatures fluctuate by about 18°F between overnight lows and afternoon highs. The sharpest temperature change occurs between April and May, with a 7°F shift in average temperatures.

San Antonio is a fairly wet location, receiving approximately 1,384 mm of precipitation annually, which averages out to around 115 mm per month. The wettest month is October, averaging 200 mm of rainfall. November and April also tend to see above-average precipitation. The driest month is July, with just 46 mm. That's 154 mm less than October, 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 54.5 in of precipitation annually, which averages out to around 4.5 in per month. The wettest month is October, averaging 7.9 in of rainfall. November and April also tend to see above-average precipitation. The driest month is July, with just 1.8 in. That's 6.1 in less than October, 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 mildly breezy, with an average annual wind speed of 12km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is August, averaging 14km/h, though still comfortable for most outdoor activities. The calmest conditions occur in February, with average winds dropping to 10km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 4km/h 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 14km/h in winter, 13km/h in spring, 11km/h in summer, 11km/h in autumn.San Antonio is moderately windy, with an average annual wind speed of 8mph. For context, sustained winds below 7mph are generally light, while anything above 16mph is considered strong. The windiest month is August, averaging 9mph, noticeable enough to affect lighter outdoor activities. The calmest conditions occur in February, with average winds dropping to 7mph, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 2mph 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 9mph in winter, 8mph in spring, 7mph in summer, 7mph in autumn.

The best time to visit San Antonio is during June, July, August and September, when the weather is most comfortable for travellers. During these months, average temperatures hover around 19°C with modest rainfall averaging 71 mm per month. By contrast, January can be uncomfortably hot with temperatures reaching 34°C. Despite being the best months overall, some rain is still likely. Pack a waterproof layer and plan a mix of indoor and outdoor activities.The best time to visit San Antonio is during June, July, August and September, when the weather is most comfortable for travellers. During these months, average temperatures hover around 67°F with modest rainfall averaging 2.8 in per month. By contrast, January can be uncomfortably hot with temperatures reaching 92°F. Despite being the best months overall, some rain is still likely. Pack a waterproof layer and plan a mix of indoor and outdoor activities.

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.