The latest update on San Antonio weather reveals mostly sunny skies with a high near 73 °F ahead of a Red Flag Warning in effect across south-central Texas. At 10:00 a.m., temperatures are hovering around 68 °F (20 °C) under clear skies.
Current Conditions and Hourly Forecast
- Current Temperature: 63°F (17°C)
- Sky: Mostly sunny
- Humidity: Around 20%
- Winds: North 15–30 mph, gusts up to 40 mph
- High: 73°F
- Low: 56°F
Hourly Forecast (CST)
| Time | Condition | Temperature |
|---|---|---|
| 8:00 AM | Mostly sunny | 65°F |
| 10:00 AM | Mostly sunny | 68°F |
| 12:00 PM | Mostly sunny | 70°F |
| 2:00 PM | Mostly sunny | 73°F |
| 4:00 PM | Mostly sunny | 71°F |
| 6:00 PM | Clear | 66°F |
| 8:00 PM | Clear | 60°F |
| 10:00 PM | Clear | 58°F |
| 11:00 PM | Clear | 56°F |
Red Flag Warning Details
The National Weather Service has issued a Red Flag Warning from 9 a.m. to 9 p.m. CST across all counties of south-central Texas, including the San Antonio metropolitan area.
- Winds: North 15–30 mph, gusts up to 40 mph
- Humidity: As low as 15–20%
- Temperatures: Around 73 °F
- Impact: Any fires that start could spread quickly due to strong winds and dry air.
Outdoor burning is not recommended, and residents are urged to take extra care when handling anything that could produce sparks or flames.
Why the Red Flag Warning Matters
A Red Flag Warning signals critical fire-weather conditions. The combination of gusty north winds, low relative humidity, and warm afternoon temperatures means fires can ignite and spread rapidly.
Residents should:
- Avoid outdoor burning, grilling, or campfires.
- Secure outdoor items like patio furniture and trash bins.
- Refrain from using power tools or machinery that could create sparks.
- Be vigilant and report any signs of smoke or fire immediately.
Today’s Weather Breakdown
| Time of Day | Condition | Wind | Humidity | Temperature |
|---|---|---|---|---|
| Morning | Mostly sunny | 20 mph N | 25% | 67°F |
| Afternoon | Sunny, windy | 25 mph N (gusts to 40 mph) | 18% | 73°F |
| Evening | Clear, breezy | 15 mph N | 22% | 60°F |
| Night | Clear, cooler | 10 mph N | 30% | 56°F |
The combination of strong winds and dry air will continue through the afternoon, making fire safety precautions vital throughout the day.
Fire-Safety Precautions for Residents
With the Red Flag Warning active, safety officials emphasize the following:
- Avoid all outdoor fires. Even a small spark could lead to rapid fire spread.
- Do not discard cigarettes from moving vehicles.
- Postpone outdoor projects that involve welding, grinding, or metal cutting.
- Keep vehicles off dry grass—the exhaust system can ignite vegetation.
- Have water or fire extinguishers readily available if working outdoors.
These steps are especially important in rural and suburban areas surrounding Bexar County, where open land and grassland can ignite easily.
Evening and Overnight Forecast
By sunset, the winds are expected to ease slightly, though breezy conditions will persist. The air will cool quickly after dark, with overnight lows dropping to around 56 °F.
The skies will remain clear overnight, allowing for good visibility and cool, comfortable sleeping weather. Humidity levels will begin to recover slightly but will stay low enough to maintain an elevated fire-risk level until early Monday.
Extended Forecast for San Antonio
- Monday: Sunny, cooler with highs in the upper 60s. Light winds expected.
- Tuesday: Partly cloudy with increasing humidity; temperatures near 72 °F.
- Wednesday: Mostly sunny and mild, slight chance of morning fog.
- Thursday: Warm and pleasant, highs in the mid-70s, light southerly winds.
- Friday: Continued dry pattern, highs in the low 70s, lows in the 50s.
The upcoming week should bring a gradual increase in humidity and a return to calmer weather, reducing the current fire-risk concerns.
San Antonio Weather Summary
In summary, San Antonio weather today brings sunshine, gusty north winds, and warm conditions—but with a serious Red Flag Warning in place for all of south-central Texas. Residents should stay alert, avoid outdoor burning, and take preventive measures to ensure community safety.
Stay aware, stay safe, and share below how the weather looks in your area today.