This Is How Much Slower You Run in Wet Weather.
The hotter it is, the slower you run – but humidity also plays a role. When the air is full of moisture, perspiration does not cool you down as it usually does. You won’t be able to run that fast because your body is trying to keep you from overheating.
A chart from Runners Connect tries to minimize the effects of moisture. This is only a rough estimate, as how you overheat also depends on other factors, such as the size and shape of your body (the bigger you are, the easier it is to overheat), and whether you are already accustomed to exercising in hot weather .
To use the chart, you need to know the dew point. To find it, enter today’s temperature and humidity percentage into this dew point calculator . Then refer to the chart to see how much your running time will suffer.
For example, let’s say your forecast is 77 degrees Fahrenheit maximum at 85 percent humidity. This is a dew point of 72 degrees. You should expect your time to be five to eight percent longer than usual over the same distance. This means that a run that takes 30 minutes on a good day will take about 32 minutes today. Or, to put it simply, just look at the last two columns in the chart. They say running light in this wet environment will be “difficult” and hard running “very difficult.” You can still run outside, but at least you know what you are getting yourself into.
How to Calculate the Effect of Moisture on Running Performance | Runners connection
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