San Jose WBGT Today — Wet Bulb Globe Temperature
Updated planning preview · 8:00 PM forecast from WeatherAPI
Estimated WBGT
17.7°C
Low
Typical activity may proceed with routine hydration.
Temperature
74°F
Humidity
42%
Heat index
76°F
UV index
0.0
Best outdoor window
6:00 PM–11:00 AM
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 |
|---|---|---|---|---|---|
| 8 AM | 71°F | 75°F | 17.8°C | 0.2 | Low |
| 10 AM | 88°F | 85°F | 23.8°C | 2.2 | Moderate |
| 12 PM | 95°F | 91°F | 25.4°C | 5.6 | High |
| 2 PM | 98°F | 95°F | 26.0°C | 5.9 | High |
| 4 PM | 96°F | 93°F | 25.7°C | 2.7 | High |
| 6 PM | 89°F | 86°F | 23.9°C | 0.3 | Moderate |
| 9 AM | 81°F | 79°F | 20.8°C | 0.8 | Low |
| 11 AM | 91°F | 87°F | 23.6°C | 4.1 | Moderate |
Today's outlook
In San Jose, the highest modeled heat burden in this preview occurs around 4:00 PM. 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 93°F
96°F / 68°F
HighTuesday
Heat index up to 95°F
98°F / 69°F
HighWednesday
Heat index up to 93°F
96°F / 68°F
HighToday in San Jose
What changes across the day
Based on the available hourly WeatherAPI forecast
Peak heat index
95°F at 2:00 PM
The preview low is 75°F around 8:00 AM.
Feels-like difference
2°F above air temp
Current humidity is 42%, one input that changes evaporative cooling.
Peak UV
5.9 at 2:00 PM
UV and heat are separate hazards; the lowest-heat hour may still need sun protection.
Tomorrow's direction
2°F hotter tomorrow
Today's forecast range is 68°F–96°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 San Jose, CA
San Jose conditions can vary with marine influence, elevation, cloud cover and distance from the coast. Use this city forecast as a planning reference and check a more local official forecast when the activity takes place in a different microclimate.
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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