San Antonio (TX) Temperatures: Monthly Averages and Year-Round Insights
On this page, we’ll explore San Antonio’s temperature statistics in detail, including day and night variations and monthly averages. We’ll also compare the annual temperature to other cities in the United States of America.
Monthly Temperature Averages
The climate in San Antonio is dynamic, ranging widely from moderate in winter to very hot in summer. Average maximum daytime temperatures reach a very hot 36°C in August. In January, the coolest month of the year, temperatures drop to a moderate 18°C. At night, minimum temperatures can drop even lower, averaging around 4°C.
The chart below illustrates the average maximum day and minimum night temperatures in San Antonio by month:
The minimum temperature is often recorded between 4 AM and 6 AM, while the highest temperature is usually reached at 3 PM. During this time the sun's heating effect is the strongest.
The chart below shows the average temperature throughout the year:
August, the city’s warmest month, also receives about 65 mm of rainfall spread over roughly 5 days. For more information, please visit our San Antonio Precipitation page.
Annual Temperatures in the United States of America Compared
The map below shows the annual temperature across the United States of America. You can also select the different months in case you are interested in a specific month.
very warm
warm
pleasant
moderate
cold
very cold
San Antonio Temperatures Compared World Wide
San Antonio’s average annual maximum temperature is 27°C. Let’s compare this with some popular tourist destinations:
Seville, Spain, stands out with its warm Mediterranean climate and an average annual temperature of 23°C.
In Toronto, Canada, the average annual temperature is 13°C, with snowy winters and warm summers.
Osaka, Japan, offers a similar climate to Tokyo, with an average annual temperature of 22°C.
In Tokyo, Japan, the average annual temperature is 21°C, expect warmer summers and milder winters than Amsterdam.
How are these Temperatures Measured?
Generally, temperature data depicting climate is usually given over a 30-year average in order to reduce short-term fluctuations and reveal better long-term trends in climate conditions.
This temperature data is taken from land-based thermometers, ocean buoys, ships, and satellites. These measurements are transmitted to weather stations and climate centers around the globe where they are processed, averaged, and analyzed in order to monitor the trends and create climate models.
Sea vs. Land Temperatures
The influence of nearby oceans or large water bodies significantly affects local temperatures:
- Ocean Influence: Coastal regions tend to have more stable temperatures, as large bodies of water absorb and release heat slowly. This often results in milder winters and cooler summers compared to inland areas.
- Continental Climates: Landmasses well away from large bodies of water tend to show greater extremes in temperature, having hotter summers and colder winters because of the absence of water as a moderating influence.
For more detailed information about San Antonio’s weather, including monthly rainfall, sunshine hours, and humidity levels, visit our San Antonio climate page.
Current temperature in San Antonio (TX)
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6 m/s
partly cloudy and small chance of slight rain
