Nashville Heat Index Today
Updated planning preview · 7:00 PM forecast from WeatherAPI
Heat index
76°F
Low
Routine outdoor plans are generally reasonable.
Temperature
73°F
Humidity
51%
Estimated WBGT
18.1°C
UV index
0.0
Best outdoor window
5:00 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 |
|---|---|---|---|---|---|
| 7 AM | 59°F | 59°F | 13.5°C | 0.0 | Low |
| 9 AM | 66°F | 66°F | 16.5°C | 1.2 | Low |
| 11 AM | 73°F | 76°F | 19.4°C | 4.3 | Low |
| 1 PM | 79°F | 78°F | 20.7°C | 5.9 | Low |
| 3 PM | 80°F | 79°F | 20.9°C | 3.7 | Low |
| 5 PM | 78°F | 77°F | 19.8°C | 0.7 | Low |
| 7 AM | 57°F | 57°F | 11.9°C | 0.0 | Low |
| 9 AM | 64°F | 64°F | 14.9°C | 1.1 | Low |
Today's outlook
In Nashville, the highest modeled heat burden in this preview occurs around 9:00 AM. The recommended window is selected from the lowest combined risk score, temperature, and UV—not from generic city copy.
Three-day forecast
Sunday
Heat index up to 81°F
81°F / 66°F
ModerateMonday
Heat index up to 79°F
80°F / 59°F
LowTuesday
Heat index up to 83°F
83°F / 57°F
ModerateToday in Nashville
What changes across the day
Based on the available hourly WeatherAPI forecast
Peak heat index
79°F at 3:00 PM
The preview low is 57°F around 7:00 AM.
Feels-like difference
4°F above air temp
Current humidity is 51%, one input that changes evaporative cooling.
Peak UV
5.9 at 1:00 PM
UV and heat are separate hazards; the lowest-heat hour may still need sun protection.
Tomorrow's direction
3°F cooler tomorrow
Today's forecast range is 66°F–81°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 Nashville, TN
Nashville heat risk can change quickly with humidity, cloud cover and the timing of a weather system. Use the hourly values rather than a single daily high, and reassess when the activity lasts into a warmer part of the day.
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
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