The dew point, which indicates the amount of moisture in the air, directly impacts how your hair behaves. Specifically, it influences whether your hair absorbs or releases moisture, leading to different styling challenges or benefits.
Understanding the dew point can help explain why your hair might react differently on various days, even if the temperature is similar. The key effects depend on whether the dew point is low or high.
Effects of Dew Point on Hair
The interaction between your hair and the surrounding atmosphere is significantly governed by the dew point. Hair, being porous, can exchange moisture with the air to reach equilibrium.
Low Dew Point
- Definition: Low dew point occurs when the dew point is below 35 degrees Fahrenheit.
- Effect: In low dew points, your hair will release water when using humectants. Humectants are ingredients that draw moisture from the air, but when the air is very dry (low dew point), they can paradoxically draw moisture out of your hair and into the dry air. This can leave hair feeling dry or brittle.
High Dew Point
- Definition: High dew point occurs when the dew point is above 60 degrees F (15C).
- Effect: In high dew points, your hair will absorb water from the atmosphere. This influx of moisture into the hair shaft can disrupt the hair's structure, causing it to swell and leading to frizz.
Summary Table: Dew Point vs. Hair Behavior
| Dew Point Range | Definition | Effect on Hair |
|---|---|---|
| Low Dew Point | Below 35°F | Hair releases water when using humectants |
| High Dew Point | Above 60°F (15°C) | Hair absorbs water from the atmosphere; causes frizz |
In essence, the dew point dictates the direction of moisture movement between your hair and the air, which is crucial for managing hair texture and style.
