Salt Lake City Heat Index Today
Updated planning preview · 5:00 PM forecast from WeatherAPI
Heat index
107°F
Very high
Reschedule strenuous activity when possible.
Temperature
106°F
Humidity
12%
Estimated WBGT
28.1°C
UV index
3.4
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 |
|---|---|---|---|---|---|
| 5 PM | 106°F | 107°F | 28.1°C | 3.4 | Very high |
| 7 PM | 101°F | 99°F | 26.1°C | 0.4 | High |
| 7 AM | 75°F | 76°F | 18.8°C | 0.0 | Low |
| 9 AM | 84°F | 81°F | 21.8°C | 1.5 | Moderate |
| 11 AM | 93°F | 90°F | 24.6°C | 5.8 | Moderate |
| 1 PM | 97°F | 95°F | 25.5°C | 9.1 | High |
| 3 PM | 100°F | 98°F | 26.1°C | 7.8 | High |
| 5 PM | 98°F | 95°F | 25.7°C | 3.4 | High |
Today's outlook
In Salt Lake City, 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 107°F
106° / 72°
Very highFriday
Heat index up to 98°F
100° / 75°
HighSaturday
Heat index up to 88°F
91° / 73°
ModerateToday in Salt Lake City
What changes across the day
Based on the available hourly WeatherAPI forecast
Peak heat index
107°F at 5:00 PM
The preview low is 76°F around 7:00 AM.
Feels-like difference
1°F above air temp
Current humidity is 12%, one input that changes evaporative cooling.
Peak UV
9.1 at 1:00 PM
UV and heat are separate hazards; the lowest-heat hour may still need sun protection.
Tomorrow's direction
9°F cooler tomorrow
Today's forecast range is 72–106°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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