Houston Heat Index Today
Updated planning preview · 9:00 PM forecast from WeatherAPI
Heat index
84°F
Moderate
Use normal heat precautions and take breaks.
Temperature
79°F
Humidity
81%
Estimated WBGT
24.3°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 | 74°F | 78°F | 23.6°C | 0.1 | Low |
| 10 AM | 76°F | 79°F | 24.0°C | 2.4 | Low |
| 12 PM | 83°F | 85°F | 25.5°C | 6.6 | Moderate |
| 2 PM | 85°F | 88°F | 26.4°C | 7.5 | Moderate |
| 4 PM | 87°F | 90°F | 26.7°C | 1.4 | Moderate |
| 6 PM | 85°F | 87°F | 25.9°C | 0.3 | Moderate |
| 8 AM | 74°F | 77°F | 21.4°C | 0.0 | Low |
| 10 AM | 80°F | 82°F | 24.4°C | 2.2 | Moderate |
Today's outlook
In Houston, the highest modeled heat burden in this preview occurs around 10:00 AM. 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 91°F
87°F / 72°F
HighTuesday
Heat index up to 90°F
87°F / 74°F
ModerateWednesday
Heat index up to 95°F
91°F / 74°F
HighToday in Houston
What changes across the day
Based on the available hourly WeatherAPI forecast
Peak heat index
90°F at 4:00 PM
The preview low is 77°F around 8:00 AM.
Feels-like difference
5°F above air temp
Current humidity is 81%, one input that changes evaporative cooling.
Peak UV
7.5 at 2:00 PM
UV and heat are separate hazards; the lowest-heat hour may still need sun protection.
Tomorrow's direction
1°F cooler tomorrow
Today's forecast range is 72°F–87°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 Houston, TX
Houston can combine high humidity with warm mornings and evenings. Humidity may keep the heat index elevated even when air temperature alone looks manageable, so compare the full hourly window before choosing a start time.
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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