Rio de Janeiro IBUTG (WBGT) Today — Wet Bulb Globe Temperature
Updated planning preview · 0:00 forecast from WeatherAPI
Estimated IBUTG (WBGT)
20.6°C
Low
Typical activity may proceed with routine hydration.
Temperature
21°C
Humidity
90%
Heat index
24°C
UV index
0.0
Best outdoor window
16:00–8:00
Lowest combined heat and UV load in the available hourly preview.
Hourly IBUTG (WBGT)
WBGT values are labeled as modeled estimates until a provider supplies measured readings.
| Time | Temperature | Heat index | Estimated IBUTG (WBGT) | UV | Risk |
|---|---|---|---|---|---|
| 06 | 21°C | 21°C | 21.6°C | 0.0 | Low |
| 08 | 20°C | 20°C | 21.4°C | 0.2 | Low |
| 10 | 21°C | 21°C | 21.5°C | 0.9 | Low |
| 12 | 20°C | 20°C | 21.4°C | 1.5 | Low |
| 14 | 20°C | 20°C | 21.2°C | 0.8 | Low |
| 16 | 20°C | 20°C | 21.1°C | 0.2 | Low |
| 06 | 19°C | 19°C | 20.7°C | 0.0 | Low |
| 08 | 19°C | 19°C | 20.7°C | 0.3 | Low |
Today's outlook
In Rio de Janeiro, the highest modeled heat burden in this preview occurs around 8:00. The recommended window is selected from the lowest combined risk score, temperature, and UV—not from generic city copy.
Three-day forecast
domingo
Heat index up to 24°C
21°C / 20°C
Lowsegunda-feira
Heat index up to 21°C
21°C / 19°C
Lowterça-feira
Heat index up to 24°C
21°C / 19°C
LowToday in Rio de Janeiro
What changes across the day
Based on the available hourly WeatherAPI forecast
Peak heat index
21°C at 10:00
The preview low is 19°C around 6:00.
Feels-like difference
3°C above air temp
Current humidity is 90%, one input that changes evaporative cooling.
Peak UV
1.5 at 12:00
UV and heat are separate hazards; the lowest-heat hour may still need sun protection.
Tomorrow's direction
3°C cooler tomorrow
Today's forecast range is 20°C–21°C.
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 Rio de Janeiro, Brazil
Rio de Janeiro can combine intense sun, humidity and strenuous outdoor activity across beaches, worksites and sports settings. Brazil calls the WBGT method IBUTG and provides a national occupational-heat monitoring tool for outdoor workers.
Forecasts describe outdoor conditions, not an individual's medical risk. Workload, duration, shade, clothing, acclimatization and health can change the appropriate decision.
Check Brazil Fundacentro Monitor IBUTG ↗Keep planning
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