Southtown, San Antonio Weather
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Climate of Southtown: monthly averages
Based on 25 years of satellite and reanalysis data (2001-2025), August is usually the hottest month in Southtown, with average daytime highs around 36°C. January is the coolest, when nights typically fall to about 4°C. That is a wide yearly range of roughly 32°C, so the seasons feel very different from each other.
The area receives about 780 mm of rain in a typical year. Most of it falls from May, and May is the wettest month at roughly 100 mm.
For outdoor plans and travel, February to April and September to November usually offer the most comfortable weather in Southtown, with mild days and relatively little rain.
| Month | Avg high | Avg low | Rainfall | Humidity |
|---|---|---|---|---|
| Jan | 16° | 4° | 49 mm | 70% |
| Feb | 19° | 6° | 36 mm | 70% |
| Mar | 24° | 10° | 61 mm | 70% |
| Apr | 28° | 14° | 62 mm | 66% |
| May | 31° | 19° | 100 mm | 68% |
| Jun | 34° | 22° | 71 mm | 65% |
| Jul | 35° | 23° | 71 mm | 65% |
| Aug | 36° | 24° | 62 mm | 61% |
| Sep | 32° | 20° | 95 mm | 68% |
| Oct | 28° | 15° | 78 mm | 68% |
| Nov | 22° | 10° | 49 mm | 70% |
| Dec | 17° | 5° | 45 mm | 69% |
Source: NASA POWER (MERRA-2 reanalysis), averaged over the roughly 50 km grid area around Southtown. Values describe typical conditions, not a forecast.
About Southtown weather
Southtown sits within Texas's vast Gulf Coast-to-arid-west range — humid subtropical in the east, semi-arid to desert further west, about 118 km south-west of Austin. Conditions turn hot with long, hot summers (June–September) with highs regularly above 35°C, more humid near the Gulf coast. By December, expect mild winters across most of the state, with occasional cold snaps and rare snow. This page shows live, auto-refreshing weather for Southtown: current conditions, an hourly breakdown, a 16-day outlook, a date-lookup tool for any past or future date, and real-time air quality, sourced from Open-Meteo. Local timezone: America/Chicago.
Frequently asked questions
Southtown is about 118 km south-west of Austin, in Texas.
Southtown sees mild winters across most of the state, with occasional cold snaps and rare snow.
The live current conditions, hourly forecast and 16-day outlook above are pulled in real time for Southtown's exact coordinates. No fixed schedule, the page updates whenever you load it.
August is usually the hottest month in Southtown, with average daytime highs of about 36°C and nights around 24°C.
The coldest nights come in January, when the average low is about 4°C and daytime highs reach around 16°C.
Southtown receives about 780 mm of rain in a typical year. May is the wettest month at roughly 100 mm, the only month that averages more than 100 mm.
February to April and September to November usually offer the most comfortable weather in Southtown, with mild daytime temperatures and little rain.
In November Southtown typically sees daytime highs near 22°C and lows near 10°C, with about 49 mm of rain over the month and average humidity around 70%. Check the live forecast above for this week's actual conditions.
Up to 16 days ahead using the extended forecast and date picker above; further-out or historical dates use the same date lookup tool.
Live temperature for Southtown is shown at the top of this page and refreshes automatically — see the hourly breakdown below for how it changes through the day.
Southtown's day-to-day weather follows the broader pattern of Texas described above. See the hourly weather forecast or the air quality index for more detail.