San Antonio, October 9, 2025
News Summary
This week in San Antonio features cool mornings, warm afternoons, and low humidity levels as high-pressure systems stabilize the weather conditions. With no significant rain expected, temperatures will rise into the 90s but feel more comfortable later in the week due to a drop in humidity. The mostly sunny skies and gentle east-northeast winds will enhance the pleasant weather, marking a transition towards fall as the average first cold front appears on the horizon.
San Antonio — This week brings cool mornings, warm afternoons, and low humidity with no significant rain expected as high-pressure systems hold over the region.
Key forecast — what to expect now
High-pressure systems are controlling the weather, leading to stable and hot conditions. Afternoon temperatures will begin to feel more comfortable later in the week as a change in the air mass arrives, especially from Friday through Sunday. A drop in humidity levels is expected, making daily highs more bearable.
Rainfall is unlikely for the week, despite two tropical systems bringing moisture to the Desert Southwest and West Texas; the rain is being steered away from San Antonio. The forecast predicts another dry stretch for the area.
On October 9, 2025, high temperatures are predicted to reach around 93°F with mostly sunny conditions. Winds are expected to be from the east-northeast at speeds of 10 to 15 mph. Overnight temperatures will remain mild: overnight lows will range from approximately 63°F to 70°F throughout the week, with clear skies.
Supporting details
High pressure aloft is keeping the atmosphere stable, limiting cloud cover and any organized rainfall. Two tropical systems are injecting moisture into parts of the Desert Southwest and West Texas, but steering currents are directing that moisture away from San Antonio, so rain is not anticipated locally this week.
Temperatures are trending typical for early October in the city: daytime highs remaining in the 90s while nights cool into the 60s. A shift to a slightly different air mass later this week will lower humidity and make state daytime heat feel less oppressive through the weekend.
Local winds are forecast from the east-northeast at 10–15 mph, which will help mix the boundary layer and aid cooling each evening. Clear skies overnight will support radiational cooling and those mild low temperatures.
Longer-range outlook and climatology
Long-term weather models suggest the possibility of cooler weather arriving later this month, but confidence in predictions remains low at this time. San Antonio has already seen a couple of weak cold fronts this season, but these have not produced a lasting change in temperature. Statistically, the average first cold front in San Antonio usually occurs around September 23, and the average last day San Antonio reaches 90°F or higher historically falls on October 19, based on a 30-year climate record (1994–2024). These indicators show fall is approaching as San Antonio nears its seasonal tipping point for cooler weather.
Meteorological staff note that while the heat persists in early October, the transition toward cooler mornings and milder afternoons will continue as the season progresses. Local health and environmental checks report that the flu risk and air quality in the area are currently considered low, with no pollen detected.
Background on recent trends
A couple of weak cold fronts earlier this season temporarily lowered temperatures but failed to bring a sustained pattern change. High pressure returning after those fronts is the primary reason for the current stable, warm conditions. The influence of distant tropical systems is increasing moisture in the region generally, but steering currents are keeping significant rainfall away from the city this week.
| Key Feature | Current / Forecast |
|---|---|
| Morning temperatures | Cool |
| Afternoon temperatures | Warm, highs near 90s; 93°F on Oct 9, 2025 |
| Humidity | Low; dropping late week |
| Rain | Unlikely this week |
| Winds | East-northeast 10 to 15 mph |
| Overnight lows | Approximately 63°F to 70°F |
Timeline
| Date / Time | Event | Status / Source |
|---|---|---|
| This week | Cool mornings, warm afternoons, low humidity; rainfall unlikely | Forecast |
| Friday through Sunday (this week) | Afternoons begin to feel more comfortable due to a change in air mass | Forecast |
| October 9, 2025 | High temperatures predicted around 93°F with mostly sunny conditions | Forecast |
| Earlier this season | San Antonio saw a couple of weak cold fronts with little lasting change | Observed |
| September 23 (average) | Average first cold front in San Antonio usually occurs around this date | Climatology (30-year record) |
| October 19 (average) | Average last day San Antonio reaches 90°F or higher historically (1994–2024) | Climatology (1994–2024) |
Simple visual charts
FAQ
Will it rain this week?
Rainfall is unlikely for the week, despite two tropical systems bringing moisture to the Desert Southwest and West Texas; the rain is being steered away from San Antonio.
What is the forecast for October 9, 2025?
On October 9, 2025, high temperatures are predicted to reach around 93°F with mostly sunny conditions.
What wind speeds are expected?
Winds are expected to be from the east-northeast at speeds of 10 to 15 mph.
What are overnight low temperatures this week?
Overnight lows will range from approximately 63°F to 70°F throughout the week, with clear skies.
Is there a longer-term change expected later this month?
Long-term weather models suggest the possibility of cooler weather arriving later this month, but confidence in predictions remains low at this time.
What is the current public health and air-quality status?
The flu risk and air quality in the area are currently considered low, with no pollen detected.
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Additional Resources
- The Weather Channel
- Google Search: San Antonio weather
- KSAT Weather
- Wikipedia: San Antonio weather
- San Antonio Express-News
- Google Scholar: San Antonio weather
- Houston Chronicle
- Encyclopedia Britannica: San Antonio weather
- Hoodline
- Google News: San Antonio weather
Author: STAFF HERE SAN ANTONIO WRITER
The SAN ANTONIO STAFF WRITER represents the experienced team at HERESanAntonio.com, your go-to source for actionable local news and information in San Antonio, Bexar County, and beyond. Specializing in "news you can use," we cover essential topics like product reviews for personal and business needs, local business directories, politics, real estate trends, neighborhood insights, and state news affecting the area—with deep expertise drawn from years of dedicated reporting and strong community input, including local press releases and business updates. We deliver top reporting on high-value events such as Fiesta San Antonio, San Antonio Stock Show & Rodeo, and Dia de los Muertos. Our coverage extends to key organizations like the Greater San Antonio Chamber of Commerce and United Way of San Antonio and Bexar County, plus leading businesses in retail, insurance, and energy that power the local economy such as H-E-B, USAA, and Valero Energy. As part of the broader HERE network, including HEREAustinTX.com, HERECollegeStation.com, HEREDallas.com, and HEREHouston.com, we provide comprehensive, credible insights into Texas's dynamic landscape.
