Humidity vs. Fog — What's the Difference?

Humidity is the concentration of water vapour present in the air. Water vapor, the gaseous state of water, is generally invisible to the human eye.

Fog is a visible aerosol consisting of tiny water droplets or ice crystals suspended in the air at or near the Earth's surface. Fog can be considered a type of low-lying cloud usually resembling stratus, and is heavily influenced by nearby bodies of water, topography, and wind conditions.

Dampness, especially of the air.

A thick cloud of tiny water droplets suspended in the atmosphere at or near the earth's surface which obscures or restricts visibility (to a greater extent than mist; strictly, reducing visibility to below 1 km)

Relative humidity.

A state or cause of perplexity or confusion

Dampness, especially that of the air.

The grass which grows in a field after a crop of hay has been taken.

The amount of water vapour in the air.

(with reference to a glass surface) cover or become covered with steam

Moisture; dampness; a moderate degree of wetness, which is perceptible to the eye or touch; - used especially of the atmosphere, or of anything which has absorbed moisture from the atmosphere, as clothing.

Bewilder or puzzle

The content of water vapor in the air, expressed as a percent of the maximum amount of water vapor that the air can hold at the given temperature; also called relative humidity. The capacity of the air to hold moisture increases with temperature, so if the temperature changes without changing the absolute content of the atmospheric moisture, the relative humidity will also change.

Spray with an insecticide.

Wetness in the atmosphere

Condensed water vapor in cloudlike masses lying close to the ground and limiting visibility.

An obscuring haze, as of atmospheric dust or smoke.

A mist or film clouding a surface, as of a window, lens, or mirror.

A cloud of vaporized liquid, especially a chemical spray used in fighting fires.

A state of mental vagueness or bewilderment.

Something that obscures or conceals; a haze

A blur on a developed photographic image.

A new growth of grass appearing on a field that has been mowed or grazed.

Tall, coarse grass left standing in fields through the winter.

To cover or envelop with fog.

To cause to be obscured; cloud.

To make vague, hazy, or confused

To obscure or dim (a photographic image).

To be covered with fog.

To be blurred, clouded, or obscured

To be dimmed or obscured. Used of a photographic image.

(uncountable) A thick cloud that forms near the ground; the obscurity of such a cloud. mist, haze.}}

(uncountable) A mist or film clouding a surface.

A state of mind characterized by lethargy and confusion.

(photography) A silver deposit or other blur on a negative or developed photographic image.

(computer graphics) Distance fog.

A new growth of grass appearing on a field that has been mowed or grazed.

Tall and decaying grass left standing after the cutting or grazing season.

(Scotland) Moss.

(intransitive) To become covered with or as if with fog.

(intransitive) To become obscured in condensation or water.

To become dim or obscure.

To make dim or obscure.

To spoil (film) via exposure to light other than in the normal process of taking a photograph.

(transitive) To cover with or as if with fog.

(transitive) To disperse insecticide into (a forest canopy) so as to collect organisms.

(transitive) To obscure in condensation or water.

(transitive) To make confusing or obscure.

To practice in a small or mean way; to pettifog.

(transitive) To pasture cattle on the fog (of), or aftergrass, of; to eat off the fog from (a field).

(intransitive) To become covered with the kind of grass called fog.

A second growth of grass; aftergrass.

Watery vapor condensed in the lower part of the atmosphere and disturbing its transparency. It differs from cloud only in being near the ground, and from mist in not approaching so nearly to fine rain. See Cloud.

A state of mental confusion.

Cloudiness or partial opacity of those parts of a developed film or a photograph which should be clear.

To pasture cattle on the fog, or aftergrass, of; to eat off the fog from.

To practice in a small or mean way; to pettifog.

To envelop, as with fog; to befog; to overcast; to darken; to obscure.

To render semiopaque or cloudy, as a negative film, by exposure to stray light, too long an exposure to the developer, etc.

To show indistinctly or become indistinct, as the picture on a negative sometimes does in the process of development.

Droplets of water vapor suspended in the air near the ground

An atmosphere in which visibility is reduced because of a cloud of some substance

Confusion characterized by lack of clarity

Make less visible or unclear;