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San Antonio weather is about to take a wild turn tonight. Thunderstorms won’t stop until Sunday morning, bringing scattered rains across the region. Prepare for unsettled conditions extending through Monday with cooler temperatures expected.
🔥 Quick Facts
- Tonight’s Status: Scattered thunderstorms continue through midnight, best chance through 4 AM Sunday
- Wind Alert: Gusts up to 30 mph possible tonight with breezy conditions persisting
- Temperature Drop: Mid-50s overnight, much cooler than previous nights during Fiesta
- Monday Impact: 70 percent rain chance with showers and thunderstorms extending into Monday
Thunderstorms Continue Through Early Sunday Morning
Tonight’s weather system brings scattered rains and isolated thunderstorms continuing through the evening. The heaviest activity peaks before 4 AM, with best chances directly over the San Antonio area and coastal plains. The system slowly drifts north to south, meaning residents should expect intermittent precipitation rather than continuous storms.
Conditions will gradually improve as the system moves out Sunday morning. Sunday afternoon turns mostly cloudy with much higher temperatures reaching the upper 60s. Wind gusts to 30 mph remain possible throughout the night, so secure any loose outdoor items and drive cautiously.
San Antonio weather tonight: thunderstorms won’t stop until Sunday morning
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Breezy Saturday Night with Significant Wind Activity
Winds persist tonight despite some easing from earlier evening. Northeast winds at 10 to 20 mph with gusts up to 25 to 35 mph create challenging conditions. Visibility may reduce to around 9 miles with heavy rain and gusty winds accompanying active thunderstorms.
The cold front that arrived earlier Saturday is driving these breezy conditions and temperature drop. Dew point drops to 45 degrees, creating a much fresher feel after the warmer Fiesta start. This marks a significant shift from the typical warm April weather San Antonio usually experiences.
Fiesta Weekend Weather Breakdown
| Time Period | Conditions | Temperature | Precipitation |
| Tonight | Thunderstorms, breezy | Low 54°F | 60% chance |
| Sunday | Mostly cloudy | 69°F High | 20% chance |
| Monday | Showers possible | 62°F High | 70% chance |
| Mid-Week | Clearing and warming | 80s°F | 10% chance |
“Scattered rains and isolated thunderstorms will continue through the evening into the overnight hours, Saturday night to Sunday morning.”
— National Weather Service Austin/San Antonio, Official Forecast
Extended Outlook: A Cooler Start to the Week
Monday brings a second chance for rain, with prospects improving for showers and thunderstorms across the region. A 50 percent rain chance persists through the morning commute. Daytime highs Monday stay in the lower 60s, which is well below the late-April average of around 80 degrees.
By Tuesday and Wednesday, conditions turn drier and warmer. Highs gradually climb from the 70s on Tuesday to the 80s by mid-week. Friday brings a slight increase in moisture again with 30 percent rain chances, but overall the pattern turns more favorable after this wet weekend system.
Is Fiesta Weekend Going to Be Ruined by This San Antonio Weather System?
Saturday night through early Sunday presents the biggest disruption risk. Outdoor Fiesta activities tonight require umbrellas and caution around wet conditions. Sunday Fiesta events should see improvement, with mostly cloudy skies but no guaranteed rain after the morning clears.
The weekend won’t be completely ruined, but attendees should monitor conditions closely. Pack rain gear, plan indoor activities for tonight, and be prepared for cooler temperatures. By mid-week, San Antonio returns to more typical spring weather with warming trends and drier conditions perfect for outdoor celebrations resuming later in Fiesta week.
Sources
- National Weather Service Austin/San Antonio – Official government weather forecasts and alerts for South Central Texas region
- KSAT Weather Authority – Local San Antonio meteorology with hourly detailed forecasts and current conditions
- AccuWeather – Extended weather predictions and temperature tracking for the San Antonio metropolitan area
