Treadly running tool

Heat Pace Adjustment Calculator

Estimate how much to slow your running pace in warm or humid conditions, with plain-language guidance for workouts and long runs.

Tool

Estimate a hot-weather pace

Enter your normal target pace plus the expected temperature, humidity, and workout duration. Use the result as a starting point, then run by effort.

Target pace minutes8 minNormal target pace before weather adjustment.Target pace seconds15 secSeconds part of your normal pace.Temperature78 FExpected temperature during the run.Humidity62 %Approximate relative humidity.Workout duration55 minLonger exposure usually deserves more caution.

Adjusted pace

8:36/mi

Noticeable slowdown: add about 21 sec/mi to preserve effort. If the session was supposed to be hard, consider shortening reps or moving the workout.

Normal

8:15/mi

Heat add

+21s

Weather

78F

Shareable result

8:36/mi

Noticeable slowdown: add about 21 sec/mi to preserve effort in 78F with 62% humidity.

Normal

8:15/mi

Heat add

+21s/mi

Weather

78F / 62%