San Antonio, TX weather by month
South · Station: San Antonio International Airport, TX · NOAA 1991–2020 Climate Normals
The best time to visit San Antonio, TX is January–April, November–December, when average daytime highs are comfortable and rainfall sits at or below the city's monthly average. San Antonio is hottest in August (avg high 96°F) and coolest in January (avg high 63°F). The wettest month is May (4.4 in) and the driest is February (1.7 in). Overall the annual mean temperature is about 69.6°F with 32.5 in of precipitation a year.
Source: NOAA NCEI U.S. Climate Normals 1991–2020. Data as of June 2026.
Monthly weather averages for San Antonio
| Month | Avg high (°F) | Avg low (°F) | Avg precip (in) |
|---|---|---|---|
| January | 63 | 41 | 2 |
| February | 68 | 45 | 1.7 |
| March | 74 | 52 | 2.3 |
| April | 80 | 58 | 2.4 |
| May | 87 | 66 | 4.4 |
| June | 92 | 73 | 3.3 |
| July | 95 | 75 | 2.4 |
| August | 96 | 75 | 2.2 |
| September | 90 | 70 | 3.9 |
| October | 82 | 60 | 3.8 |
| November | 72 | 50 | 2.1 |
| December | 65 | 42 | 2 |
Source: NOAA NCEI U.S. Climate Normals 1991–2020. Data as of June 2026.
Best time to visit San Antonio
Based on the normals above, the most pleasant window is January–April, November–December. In those months daytime highs are in the mild-to-warm range and precipitation is no higher than the city's typical month, so you avoid both the peak very hot of August (when highs reach about 96°F — extreme heat — limit midday activity) and the cool, darker conditions around January (highs near 63°F). Try to avoid May if rain would spoil your plans — it is the wettest month at 4.4 in. Use the packing & comfort tool to check any specific month.
How San Antonio compares
San Antonio's 32.5 in of annual precipitation and 69.6°F mean temperature put it in context with other US cities. See where it ranks for warmest in January, rainiest overall and driest overall, or browse the full list of cities.
Frequently asked questions
What is the best time to visit San Antonio?
The most comfortable time to visit San Antonio, TX is January–April, November–December, when average daytime highs are mild and rainfall is at or below the city's average. San Antonio is hottest in August (avg high 96°F) and coolest in January (avg high 63°F), per NOAA 1991–2020 Climate Normals.
What is the average temperature in San Antonio?
San Antonio's annual mean temperature is about 69.6°F. The warmest month is August (average high 96°F, low 75°F) and the coolest is January (average high 63°F, low 41°F).
How much rain does San Antonio get?
San Antonio receives about 32.5 inches of precipitation a year. The wettest month is May (4.4 in) and the driest is February (1.7 in).
Source
Monthly averages from the NOAA NCEI U.S. Climate Normals 1991–2020, station San Antonio International Airport, TX (reference values verified against the published normals). Climate normals describe a 30-year average, not a forecast; any individual year can differ. See our methodology for how "best time to visit" is derived.
Last updated: 2026-06-18