The relative humidity is useful in predicting fire danger. Typically, with higher winds and relative humidity lower than 25 percent, you are nearing critical fire danger.

We investigate what relative humidity is, why it matters, and what it means for your home.

What is it relative to? — Anthony Sporlin, Barrington Dear Anthony, “Relative” in relative humidity refers to the maximum amount of water vapor that air can hold at a specific temperature.

What does 100 per cent humidity mean? One of the ways we quantify the amount of water vapour in the air is "relative humidity". This measures how saturated the water is, meaning how much water it ...

High humidity can often make people feel uncomfortable and have difficulty sleeping. And humid weather is sometimes accompanied by thunderstorms and heavy rain.

But what does that really mean In short, the relative humidity is a function of both the moisture content in the atmosphere and the actual air temperature.

When the relative humidity is cited as 50 percent, that means that the air is halfway to its saturation point, and that net evaporation is occurring.

On close examination, however, it does not appear as though the relative humidity level in your attic is so very different than the outdoor air.