Austin Heat Index Today
Updated planning preview · 6:00 PM forecast from WeatherAPI
Heat index
102°F
High
Reduce prolonged exertion and plan extra recovery.
Temperature
103°F
Humidity
20%
Estimated WBGT
29.1°C
UV index
1.4
Best outdoor window
6:00 PM–9:00 AM
Lowest combined heat and UV load in the available hourly preview.
Hourly heat risk
WBGT values are labeled as modeled estimates until a provider supplies measured readings.
| Time | Temperature | Heat index | Estimated WBGT | UV | Risk |
|---|---|---|---|---|---|
| 6 PM | 103°F | 102°F | 29.1°C | 1.4 | High |
| 8 PM | 98°F | 96°F | 27.4°C | 0.0 | High |
| 9 AM | 84°F | 88°F | 26.4°C | 1.4 | Moderate |
| 11 AM | 94°F | 96°F | 28.2°C | 6.2 | High |
| 1 PM | 101°F | 103°F | 29.9°C | 10.0 | Very high |
| 3 PM | 105°F | 106°F | 30.5°C | 8.5 | Very high |
| 5 PM | 105°F | 105°F | 30.1°C | 2.8 | Very high |
| 7 PM | 88°F | 90°F | 26.8°C | 0.0 | High |
Today's outlook
In Austin, the highest modeled heat burden in this preview occurs around 5:00 PM. The recommended window is selected from the lowest combined risk score, temperature, and UV—not from generic city copy.
Three-day forecast
Thursday
Heat index up to 118°F
106° / 78°
Very highFriday
Heat index up to 107°F
106° / 79°
Very highSaturday
Heat index up to 104°F
104° / 79°
Very highToday in Austin
What changes across the day
Based on the available hourly WeatherAPI forecast
Peak heat index
106°F at 3:00 PM
The preview low is 88°F around 9:00 AM.
Feels-like difference
1°F below air temp
Current humidity is 20%, one input that changes evaporative cooling.
Peak UV
10.0 at 1:00 PM
UV and heat are separate hazards; the lowest-heat hour may still need sun protection.
Tomorrow's direction
11°F cooler tomorrow
Today's forecast range is 78–106°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.
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