The best times to visit San Antonio for ideal weather are
February 19th to April 22nd
October 29th to November 25th
based on average temperature and humidity from NOAA (the National Oceanic and Atmospheric Administration). Read below for more weather and travel details.
San Antonio Travel Guide
Weather in San Antonio
Average temperatures in San Antonio vary somewhat and are seasonally temperate. The area is in the top 82 percent of tourist destinations for pleasant weather. Weeks with ideal weather are listed above. If you’re looking for the very warmest time to visit San Antonio, the hottest months are August, July, and then June. See average monthly temperatures below. The warmest time of year is generally early-to-mid-August where highs are regularly around 101°F (38.3°C) with temperatures rarely dropping below 76°F (24.4°C) at night.
San Antonio Temperatures (Fahrenheit)
San Antonio Temperatures (Celsius)
The way we experience weather isn’t all about temperature. Higher temperatures affect us much more at higher humidity, and colder temperatures feel piercing with high winds. Our perceived temperatures factor in humidity and wind chill to better represent how hot or cold the day feels to a person.
San Antonio Perceived Temperature (F)
San Antonio Perceived Temperature (C)
Average San Antonio Temperatures by Month
Daily highs (averaged for the month) usually give the best indication of the weather. A significantly lower mean and low generally just means it gets colder at night.
|Month||Avg. High (°F)||Avg. Mean (°F)||Avg. Low (°F)|
|Month||Avg. High (°C)||Avg. Mean (°C)||Avg. Low (°C)|
Precipitation (Rain or Snow)
If dry weather is what you’re after, the months with the lowest chance of precipitation in San Antonio are May, September, and then January. The lowest chance of rain or snow occurs around early August. For example, on the week of July 30th there are only 0.5 days of precipitation on average. By contrast, it’s most likely to rain or snow in late May with an average of 2.7 days with significant precipitation the week of May 21st.
When can you find snow in San Antonio? Weather stations report a bit of annual snow likely to be deepest around no given month, especially close to late January and early February. Powder (new snow) is most often falls around January 29th. Please note that a value of 0 for snow in the graph below may either mean there was no snow, or that snow is unreported.
Chance of Precipitation
The graph below shows the % chance of rainy and snowy days in San Antonio.
Snow on the Ground
The graph below shows the average snow on the ground in San Antonio (in).
Average Rain and Snow by Month
|Month||Daily Chance of Rain||Average Snow Depth (in)||Total Precipitation (in)|
|Month||Daily Chance of Rain||Average Snow Depth (cm)||Total Precipitation (cm)|
Humidity and Wind
San Antonio has slightly low to average humidity compared to most tourist destinations. The least humid month is August (48.7% relative humidity), and the most humid month is May (57.7%).
Wind in San Antonio is usually moderate. The windiest month is May, followed by April and June. May’s average wind speed of around 7.8 knots (9 MPH or 14.4 KPH) is considered “gentle breeze.” Maximum sustained winds (the highest speed for the day lasting more than a few moments) are at their highest in late April where average top sustained speeds reach 15.1 knots, which is considered a moderate breeze.
Relative Humidity (%)
The graph below shows the average % humidity by month in San Antonio.
The graph below shows wind speed (max and average) in knots.
Average Wind Speeds
Show Wind Speeds
All wind speeds are in knots.
|Month||Avg. Wind||Meaning (Beaufort)||Avg. Maximum Sustained Wind||Meaning (Beufort)|
|Jan||5.8||a light breeze||11.7||a moderate breeze|
|Feb||6.7||a light breeze||12.8||a moderate breeze|
|Mar||7.2||a gentle breeze||13.8||a moderate breeze|
|Apr||7.6||a gentle breeze||14.1||a moderate breeze|
|May||7.8||a gentle breeze||14||a moderate breeze|
|Jun||7.4||a gentle breeze||13.5||a moderate breeze|
|Jul||6.5||a light breeze||12.9||a moderate breeze|
|Aug||6||a light breeze||12.3||a moderate breeze|
|Sep||5.3||a light breeze||11.4||a moderate breeze|
|Oct||5.6||a light breeze||11.3||a moderate breeze|
|Nov||5.5||a light breeze||11.3||a moderate breeze|
|Dec||5.5||a light breeze||11.2||a moderate breeze|
Show Relative Humidity by Month
|Month||Avg. Relative Humidity|
Is it Safe to Travel to San Antonio?
As of 6/22/2017 there are no travel advisories or warnings for the United States; exercise normal security precautions. Check this page for any recent changes or regions to avoid: Travel Advice and Advisories.
Overall San Antonio Travel Experience by Season
Spring (March through May)
Humidity and temperatures combine to make this season feel warm. Highs range from 92.6°F (33.7°C) and 73.1°F (22.8°C) with warmer temperatures in the later months. Rain is somewhat common with 6 to 8 days of precipitation per month. Spring is slow/unreported for tourism, which makes it a good time for those looking for deals.
Summer (June through August)
The middle-year months have hot weather with high temperatures that are quite warm. These months see moderate precipitation with 4 to 6 days of precipitation per month. June – August is slow/unreported season for tourism in San Antonio, so lodging and other accommodations may cost as much as usual.
Fall (September through November)
Fall daily highs range from 95.8°F (35.4°C) and 70.6°F (21.4°C), which will feel very nice given the humidity and wind. It rains or snows a fair amount: 5 to 7 days per month. Tourism is slow/unreported during these months due to the weather, so hotels may be normally priced.
Winter (December through February)
Weather is too cold this time of year in San Antonio to be enjoyable for warm weather travelers. The average high during this season is between 75.5°F (24.2°C) and 62.8°F (17.1°C). On average, it rains or snows a noticeable amount: 5 to 7 times per month. These times of year are slow/unreported with tourists.