San Antonio WBGT Today — Wet Bulb Globe Temperature
Updated planning preview · 10:00 PM forecast from WeatherAPI
Estimated WBGT
19.9°C
Low
Typical activity may proceed with routine hydration.
Temperature
76°F
Humidity
55%
Heat index
78°F
UV index
0.0
Best outdoor window
6:00 PM–10:00 AM
Lowest combined heat and UV load in the available hourly preview.
Hourly WBGT
WBGT values are labeled as modeled estimates until a provider supplies measured readings.
| Time | Temperature | Heat index | Estimated WBGT | UV | Risk |
|---|---|---|---|---|---|
| 8 AM | 68°F | 68°F | 17.9°C | 0.0 | Low |
| 10 AM | 76°F | 78°F | 20.8°C | 2.0 | Low |
| 12 PM | 82°F | 82°F | 23.4°C | 6.5 | Moderate |
| 2 PM | 85°F | 87°F | 25.5°C | 8.1 | Moderate |
| 4 PM | 86°F | 88°F | 26.0°C | 4.6 | Moderate |
| 6 PM | 85°F | 87°F | 25.7°C | 0.8 | Moderate |
| 8 AM | 72°F | 76°F | 20.9°C | 0.0 | Low |
| 10 AM | 79°F | 80°F | 22.5°C | 1.9 | Low |
Today's outlook
In San Antonio, the highest modeled heat burden in this preview occurs around 6:00 PM. The recommended window is selected from the lowest combined risk score, temperature, and UV—not from generic city copy.
Three-day forecast
Monday
Heat index up to 88°F
86°F / 71°F
ModerateTuesday
Heat index up to 88°F
86°F / 68°F
ModerateWednesday
Heat index up to 88°F
87°F / 71°F
ModerateToday in San Antonio
What changes across the day
Based on the available hourly WeatherAPI forecast
Peak heat index
88°F at 4:00 PM
The preview low is 68°F around 8:00 AM.
Feels-like difference
2°F above air temp
Current humidity is 55%, one input that changes evaporative cooling.
Peak UV
8.1 at 2:00 PM
UV and heat are separate hazards; the lowest-heat hour may still need sun protection.
Tomorrow's direction
about steady tomorrow
Today's forecast range is 71°F–86°F.
Where these numbers come from
WeatherAPI supplies the forecast. HeatGuard calculates heat-index risk and models WBGT from forecast temperature, humidity and a daytime solar allowance. Modeled WBGT is not an on-site globe-thermometer reading.
Local planning context
Planning for heat in San Antonio, TX
San Antonio can combine high humidity with warm mornings and evenings. Humidity may keep the heat index elevated even when air temperature alone looks manageable, so compare the full hourly window before choosing a start time.
Forecasts describe outdoor conditions, not an individual's medical risk. Workload, duration, shade, clothing, acclimatization and health can change the appropriate decision.
Nearby forecasts
Keep planning
Track San Antonio in HeatGuard
Save this location and get alerts as conditions change.