San Antonio (KSAT) Temperature Market Guide

KSAT • San Antonio International Airport

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San Antonio International Airport (KSAT) offers a ForecastEx temperature market in South Texas. Located at the edge of the Hill Country, San Antonio experiences long, hot summers and mild winters.

Quick Facts

Station Code	`KSAT`
Location	San Antonio, TX
Coordinates	29.5337°N, 98.4698°W
Elevation	809 ft (247 m)
Timezone	CT (America/Chicago)
NWS Office	Austin/San Antonio (EWX)
Resolution Source	NWS CLI Report ↗

About the KSAT Weather Station

The KSAT ASOS is located at San Antonio International Airport on the north side of the city, approximately 8 miles from downtown. At 809 feet elevation, the station sits at the transition between the Texas Hill Country and the Gulf Coastal Plain.

San Antonio Climate & Temperature Patterns

San Antonio experiences a humid subtropical climate (Koppen: Cfa) with hot summers and mild winters.

Key Climate Factors:

Subtropical Warmth: San Antonio's southern position means warmer temperatures than Central Texas cities.

Gulf Influence: Proximity to the Gulf brings persistent moisture.

Cold Front Moderation: Cold fronts weaken as they push into South Texas.

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Seasonal Trading Considerations

Winter (December - February):
Mild with average highs in the upper 50s to low 60s°F.

Spring (March - May):
Rapid warming with temperatures reaching the 90s by May.

Summer (June - August):
Hot with average highs in the mid-90s°F. 100°F+ days are common.

Fall (September - November):
September remains hot; October brings pleasant conditions.

San Antonio-Specific Trading Tips

Compare to Austin: San Antonio typically runs 1-3°F warmer than Austin.

Weakened Cold Fronts: Cold fronts lose intensity in South Texas.

Persistent Summer Heat: Summers are long and consistently hot.

Market Resolution Details

San Antonio temperature markets resolve based on the official high temperature in the NWS CLI for station KSAT, issued by the Austin/San Antonio forecast office (EWX).

Resolution Source: NWS CLI (Climatological Report)

Reporting Period: 12:00 AM to 11:59 PM Central Standard Time.

Data Release Schedule

Typical release times for key data products at KSAT. Times shown in UTC.

Data Type	Typical Time (UTC)	Variability
CLI Report Daily climatological summary	08:18 UTC	±21 min
24hr High METAR with max temp	05:51 UTC	±1 min
METAR Hourly observations	Hourly at :51	±0 min
DSM #1 Daily summary message	23:17 UTC	Issuance time
DSM #2 Daily summary message	13:17 UTC	Issuance time
DSM #3 Daily summary message	22:17 UTC	Issuance time
DSM #4 Daily summary message	13:16 UTC	Issuance time

6-Hour High/Low Reports

These METARs include 6-hour maximum and minimum temperatures, useful for tracking intraday temperature trends.

05:51 UTC

11:51 UTC

17:51 UTC

23:51 UTC

Note: Times are approximate and may vary. CLI reports are the official resolution source for temperature markets. See NWS Data Guide for more information.

Data Resources

Quick links to official data sources and tools for San Antonio.

📊 NWS Data

🗄️ Iowa Environmental Mesonet

📈 Wethr.net Tools

Forecasting Challenges

Cold Front Penetration: Determining how far south cold air will penetrate creates uncertainty.

Summer Extremes: Forecasting exact peaks during heat waves requires attention to subtle factors.

Historical Temperature Records

Record High: 111°F recorded in September 2000.

Record Low: 0°F recorded in January 1949.

100°F+ Days: San Antonio averages 15-20 days per year at or above 100°F.

📡 Official Data Sources

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