Las Vegas Heat Index Today
Updated planning preview · 4:00 PM forecast from WeatherAPI
Heat index
113°F
Very high
Reschedule strenuous activity when possible.
Temperature
110°F
Humidity
12%
Estimated WBGT
29.8°C
UV index
3.8
Best outdoor window
7:00 AM–11:00 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 |
|---|---|---|---|---|---|
| 4 PM | 110°F | 113°F | 29.8°C | 3.8 | Very high |
| 6 PM | 108°F | 110°F | 28.7°C | 0.5 | Very high |
| 7 AM | 82°F | 81°F | 22.6°C | 0.2 | Moderate |
| 9 AM | 86°F | 83°F | 23.3°C | 2.9 | Moderate |
| 11 AM | 92°F | 89°F | 25.1°C | 7.9 | Moderate |
| 1 PM | 97°F | 94°F | 25.8°C | 9.8 | High |
| 3 PM | 99°F | 97°F | 25.6°C | 6.5 | High |
| 5 PM | 99°F | 97°F | 25.5°C | 1.8 | High |
Today's outlook
In Las Vegas, 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
Thursday
Heat index up to 114°F
111° / 84°
Very highFriday
Heat index up to 97°F
99° / 82°
HighSaturday
Heat index up to 98°F
100° / 83°
HighToday in Las Vegas
What changes across the day
Based on the available hourly WeatherAPI forecast
Peak heat index
113°F at 4:00 PM
The preview low is 81°F around 7:00 AM.
Feels-like difference
3°F above air temp
Current humidity is 12%, one input that changes evaporative cooling.
Peak UV
9.8 at 1:00 PM
UV and heat are separate hazards; the lowest-heat hour may still need sun protection.
Tomorrow's direction
17°F cooler tomorrow
Today's forecast range is 84–111°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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