Heat Run Advisor
Conditions, best start times, and fuel for the session you plan.
Forecasts available up to 16 days ahead. Conditions change — check again closer to your run.
Requesting location…
Format: 9:30 or 9.5
Duration auto from distance × pace
Improves fluid estimates
Heat Index
—
WBGT
—
Wet Bulb Globe Temperature — heat stress from air temp, humidity, sun, and wind (not just the thermometer).
UV Index
—
Pressure
—
hPa
Click any metric for its time series.
Recommended pace
Heat-adjusted from your target
—
Fuel for this session
Carbs
—
Fluid
—
Sodium
—
Effort Guidance
Notes
Best start times · next 24h
Ranked by WBGT over your durationLoad weather to see windows.
Estimates only · Open-Meteo · ACSM / sports nutrition guidelines
Always prioritize how you feel over any calculator