- WinterDec–Feb41°65°
- December40°64°
- January40°64°
- February43°67°
- SpringMar–May58°81°
- March51°74°
- April57°81°
- May66°87°
- SummerJun–Aug73°94°
- June72°92°
- July74°94°
- August74°96°
- AutumnSep–Nov59°81°
- September69°90°
- October59°81°
- November49°72°
San Antonio, TX Weather by Month and Climate Averages
San Antonio, TX gets 34.0 in of precipitation a year over about 85 rainy days. August is the warmest month (average high 96°F) and January the coldest (average low 40°F).
San Antonio climate at a glance
Humid subtropical climate
San Antonio, TX has hot summers and mild winters. Daytime highs range from about 64°F in January to 96°F in August. May is usually the wettest month, and snow falls in winter. The most comfortable time to visit is typically January to March and November to December, when daytime highs sit near 68°F.
How much rain does San Antonio get?
San Antonio gets 34.0 in of precipitation in an average year, spread over about 85 days with measurable rain. That is fewer rainy days than 53% of the US.
May is the wettest month, with 4.4 in. February is the driest, with 1.9 in. February has the most rainy days, about 9.
The longest dry spell in the last five years lasted 28 days, to October 1, 2024.
See where San Antonio ranks: rainiest cities in the US, US cities with the most rainy days, rainiest cities in Texas.
Does it snow in San Antonio?
Rarely. The reporting station for San Antonio averages under 0.5 in of snow a season.
The snowiest winter on record is 1984–85, with 15.9 in.
The most recent measurable snow at the station fell on January 21, 2025.
See where San Antonio ranks: snowiest cities in the US.
San Antonio weather by month
San Antonio weather in January
In January, San Antonio averages a high of 64°F and a low of 40°F. It gets 2.2 in of precipitation over about 8 rainy days. The sun is out about 53% of daylight hours. The January record high is 86°F (2013) and the record low is 14°F (2024). January is one of the most comfortable months to visit.
San Antonio weather in February
In February, San Antonio averages a high of 67°F and a low of 43°F. It gets 1.9 in of precipitation over about 9 rainy days. The sun is out about 47% of daylight hours. The February record high is 91°F (2008) and the record low is 9°F (2021). February is one of the most comfortable months to visit.
San Antonio weather in March
In March, San Antonio averages a high of 74°F and a low of 51°F. It gets 2.4 in of precipitation over about 8 rainy days. The sun is out about 40% of daylight hours. The March record high is 95°F (2008) and the record low is 21°F (2002). March is one of the most comfortable months to visit.
San Antonio weather in April
In April, San Antonio averages a high of 81°F and a low of 57°F. It gets 2.3 in of precipitation over about 6 rainy days. The sun is out about 39% of daylight hours. The April record high is 98°F (2009) and the record low is 33°F (2019).
San Antonio weather in May
In May, San Antonio averages a high of 87°F and a low of 66°F. It gets 4.4 in of precipitation over about 7 rainy days. The sun is out about 39% of daylight hours. The May record high is 100°F (2009) and the record low is 41°F (2013).
San Antonio weather in June
In June, San Antonio averages a high of 92°F and a low of 72°F. It gets 3.5 in of precipitation over about 6 rainy days. The sun is out about 56% of daylight hours. The June record high is 108°F (1998) and the record low is 53°F (2004).
San Antonio weather in July
In July, San Antonio averages a high of 94°F and a low of 74°F. It gets 2.4 in of precipitation over about 6 rainy days. The sun is out about 49% of daylight hours. The July record high is 107°F (2020) and the record low is 57°F (2019).
San Antonio weather in August
In August, San Antonio averages a high of 96°F and a low of 74°F. It gets 2.4 in of precipitation over about 4 rainy days. The sun is out about 55% of daylight hours. The August record high is 110°F (2011) and the record low is 61°F (2017).
San Antonio weather in September
In September, San Antonio averages a high of 90°F and a low of 69°F. It gets 3.9 in of precipitation over about 7 rainy days. The sun is out about 61% of daylight hours. The September record high is 110°F (2000) and the record low is 45°F (2020).
San Antonio weather in October
In October, San Antonio averages a high of 81°F and a low of 59°F. It gets 3.9 in of precipitation over about 8 rainy days. The sun is out about 59% of daylight hours. The October record high is 97°F (2020) and the record low is 30°F (2017).
San Antonio weather in November
In November, San Antonio averages a high of 72°F and a low of 49°F. It gets 2.5 in of precipitation over about 7 rainy days. The sun is out about 48% of daylight hours. The November record high is 90°F (2017) and the record low is 22°F (2018). November is one of the most comfortable months to visit.
San Antonio weather in December
In December, San Antonio averages a high of 64°F and a low of 40°F. It gets 2.1 in of precipitation over about 8 rainy days. The sun is out about 48% of daylight hours. The December record high is 84°F (2017) and the record low is 21°F (1997). December is one of the most comfortable months to visit.
Sunshine, humidity and wind in San Antonio
September is the sunniest month in San Antonio, with sunshine about 61% of daylight hours. April is the cloudiest, at 39%. Over the year the sun shines about 50% of daylight hours. San Antonio is sunnier than 61% of the US.
Humidity peaks in May at 70% and is lowest in August at 58%.
San Antonio has about 97 days a year above 90°F. San Antonio is hotter than 92% of the US.
Thunderstorms occur on about 22 days a year.
See where San Antonio ranks: sunniest cities in the US, cloudiest cities in the US, hottest cities in the US.
First and last freeze in San Antonio
The first fall freeze in San Antonio typically comes around November 28, and the last spring freeze around February 20. That leaves a frost-free growing season of about 281 days.
San Antonio weather records
The hottest temperature on record at the San Antonio station is 110°F, on September 6, 2000. The coldest is 9°F, on February 16, 2021.
The wettest day on record brought 14.3 in of rain, on October 18, 1998.
The best time to visit San Antonio
The most comfortable time to visit is typically January to March and November to December, when daytime highs sit near 68°F.
Winter (December–February) is mild, with average highs around 65°F and lows near 41°F. Snow is possible.
Spring (March–May) is warm, with average highs around 81°F and lows near 58°F.
Summer (June–August) is hot, with average highs around 94°F and lows near 73°F.
Autumn (September–November) is warm, with average highs around 81°F and lows near 59°F.
Monthly climate
| Month | Precip | Rain days | Humidity | Sunshine | Record high | Record low |
|---|---|---|---|---|---|---|
| January | 2.2 in | 8 | 60% | 53% | 86° | 14° |
| February | 1.9 in | 9 | 63% | 47% | 91° | 9° |
| March | 2.4 in | 8 | 60% | 40% | 95° | 21° |
| April | 2.3 in | 6 | 63% | 39% | 98° | 33° |
| May | 4.4 in | 7 | 70% | 39% | 100° | 41° |
| June | 3.5 in | 6 | 64% | 56% | 108° | 53° |
| July | 2.4 in | 6 | 63% | 49% | 107° | 57° |
| August | 2.4 in | 4 | 58% | 55% | 110° | 61° |
| September | 3.9 in | 7 | 60% | 61% | 110° | 45° |
| October | 3.9 in | 8 | 59% | 59% | 97° | 30° |
| November | 2.5 in | 7 | 67% | 48% | 90° | 22° |
| December | 2.1 in | 8 | 67% | 48% | 84° | 21° |
From ERA5 reanalysis. Sunshine is estimated from cloud cover.
San Antonio climate questions
How much rain does San Antonio get?
San Antonio gets 34.0 in of precipitation in an average year, over about 85 rainy days.
What is the wettest month in San Antonio?
May is the wettest month in San Antonio, with 4.4 in. February is the driest, with 1.9 in.
How many rainy days does San Antonio have a year?
San Antonio has about 85 days with measurable rain in an average year. February has the most, about 9.
Does it snow in San Antonio?
Rarely. The reporting station for San Antonio averages under 0.5 in of snow a season. The snowiest winter on record is 1984–85, with 15.9 in.
What is the hottest month in San Antonio?
August is the warmest month in San Antonio, with an average high of 96°F.
What is the coldest month in San Antonio?
January is the coldest month in San Antonio, with an average low of 40°F.
What is the record high temperature in San Antonio?
The record high at the San Antonio station is 110°F, set on September 6, 2000. The record low is 9°F, on February 16, 2021.
What is the sunniest month in San Antonio?
September is the sunniest month in San Antonio, with sunshine about 61% of daylight hours. April is the cloudiest.
When is the first frost in San Antonio?
The first fall freeze in San Antonio typically comes around November 28. The last spring freeze is around February 20.
What is the best time to visit San Antonio?
The most comfortable time to visit is typically January to March and November to December, when daytime highs sit near 68°F.
Source: NOAA GHCN-Daily station SAN ANTONIO INCARNATE WORD (6 km away).
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Normals from NOAA GHCN-Daily station SAN ANTONIO INCARNATE WORD.