Denver Heat Index Today
Updated planning preview · 9:00 PM forecast from WeatherAPI
Heat index
75°F
Low
Routine outdoor plans are generally reasonable.
Temperature
77°F
Humidity
18%
Estimated WBGT
16.0°C
UV index
0.0
Best outdoor window
8:00 AM–12:00 PM
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 |
|---|---|---|---|---|---|
| 8 AM | 67°F | 67°F | 14.5°C | 0.2 | Low |
| 10 AM | 75°F | 74°F | 17.4°C | 1.9 | Low |
| 12 PM | 83°F | 79°F | 19.5°C | 5.0 | Low |
| 2 PM | 86°F | 82°F | 19.8°C | 5.1 | Moderate |
| 4 PM | 86°F | 82°F | 19.6°C | 2.2 | Moderate |
| 6 PM | 83°F | 80°F | 19.1°C | 0.2 | Low |
| 9 AM | 71°F | 72°F | 15.7°C | 0.9 | Low |
| 11 AM | 76°F | 74°F | 17.3°C | 3.8 | Low |
Today's outlook
In Denver, the highest modeled heat burden in this preview occurs around 4:00 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 84°F
88°F / 63°F
ModerateTuesday
Heat index up to 82°F
86°F / 66°F
ModerateWednesday
Heat index up to 79°F
82°F / 66°F
LowToday in Denver
What changes across the day
Based on the available hourly WeatherAPI forecast
Peak heat index
82°F at 2:00 PM
The preview low is 67°F around 8:00 AM.
Feels-like difference
2°F below air temp
Current humidity is 18%, one input that changes evaporative cooling.
Peak UV
5.1 at 2:00 PM
UV and heat are separate hazards; the lowest-heat hour may still need sun protection.
Tomorrow's direction
2°F cooler tomorrow
Today's forecast range is 63°F–88°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 Denver, CO
Elevation and intense sun can make Denver outdoor exposure feel different from the air temperature alone. Heat index and UV answer different questions, so review both before a long or strenuous activity.
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 Denver in HeatGuard
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