Sendai WBGT Today — Wet Bulb Globe Temperature
Updated planning preview · 12:00 forecast from WeatherAPI
Estimated WBGT
20.9°C
Low
Typical activity may proceed with routine hydration.
Temperature
21°C
Humidity
82%
Heat index
21°C
UV index
2.0
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 | 21°C | 21°C | 20.9°C | 2.0 | Low |
| 14 | 23°C | 25°C | 22.0°C | 3.6 | Low |
| 16 | 22°C | 25°C | 22.1°C | 0.7 | Low |
| 6 | 20°C | 20°C | 21.3°C | 0.1 | Low |
| 8 | 22°C | 25°C | 23.0°C | 2.2 | Low |
| 10 | 26°C | 28°C | 25.3°C | 5.6 | Moderate |
| 12 | 29°C | 32°C | 27.1°C | 6.5 | Moderate |
| 14 | 24°C | 26°C | 24.5°C | 4.4 | Low |
Today's outlook
In Sendai, the highest modeled heat burden in this preview occurs around 12:00. 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 25°C
23°C / 17°C
LowMonday
Heat index up to 32°C
29°C / 19°C
ModerateTuesday
Heat index up to 20°C
20°C / 17°C
LowToday in Sendai
What changes across the day
Based on the available hourly WeatherAPI forecast
Peak heat index
32°C at 12:00
The preview low is 20°C around 6:00.
Feels-like difference
Matches air temp
Current humidity is 82%, one input that changes evaporative cooling.
Peak UV
6.5 at 12:00
UV and heat are separate hazards; the lowest-heat hour may still need sun protection.
Tomorrow's direction
7°C hotter tomorrow
Today's forecast range is 17°C–23°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 Sendai, Japan
Sendai is cooler than many southern Japanese cities on average, but summer heat events can still create hazardous conditions for training and outdoor work. Check the hourly trend against Japan's official Sendai WBGT observation.
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
Track Sendai in HeatGuard
Save this location and get alerts as conditions change.