Tokyo WBGT Today — Wet Bulb Globe Temperature
Updated planning preview · 12:00 forecast from WeatherAPI
Estimated WBGT
24.1°C
Moderate
Add breaks and watch how you feel.
Temperature
25°C
Humidity
70%
Heat index
27°C
UV index
8.0
Best outdoor window
16:00–8:00
Lowest combined heat and UV load in the available hourly preview.
Hourly WBGT
WBGT values are labeled as modeled estimates until a provider supplies measured readings.
| Time | Temperature | Heat index | Estimated WBGT | UV | Risk |
|---|---|---|---|---|---|
| 12 | 25°C | 27°C | 24.1°C | 8.0 | Moderate |
| 14 | 27°C | 29°C | 25.2°C | 4.3 | Moderate |
| 16 | 27°C | 29°C | 25.6°C | 1.0 | Moderate |
| 6 | 24°C | 26°C | 24.4°C | 0.1 | Low |
| 8 | 27°C | 29°C | 25.7°C | 2.3 | Moderate |
| 10 | 30°C | 32°C | 26.9°C | 6.6 | Moderate |
| 12 | 31°C | 34°C | 27.8°C | 8.3 | High |
| 14 | 31°C | 34°C | 27.8°C | 5.1 | High |
Today's outlook
In Tokyo, the highest modeled heat burden in this preview occurs around 14:00. 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 29°C
27°C / 21°C
ModerateMonday
Heat index up to 34°C
31°C / 24°C
HighTuesday
Heat index up to 32°C
30°C / 23°C
ModerateToday in Tokyo
What changes across the day
Based on the available hourly WeatherAPI forecast
Peak heat index
34°C at 14:00
The preview low is 26°C around 6:00.
Feels-like difference
2°C above air temp
Current humidity is 70%, one input that changes evaporative cooling.
Peak UV
8.3 at 12:00
UV and heat are separate hazards; the lowest-heat hour may still need sun protection.
Tomorrow's direction
5°C hotter tomorrow
Today's forecast range is 21°C–27°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 Tokyo, Japan
Tokyo residents already encounter WBGT through Japan's national heat-illness warning system. Use this hourly forecast-based estimate for planning, then compare it with the Ministry of the Environment's local WBGT observation and alert before strenuous outdoor activity.
Forecasts describe outdoor conditions, not an individual's medical risk. Workload, duration, shade, clothing, acclimatization and health can change the appropriate decision.
Check Japan Ministry of the Environment WBGT forecast ↗Nearby forecasts
Keep planning
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