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Dew vs. Fog: Know the Difference

Shumaila Saeed
By Shumaila Saeed || Published on January 3, 2024
Dew is condensation forming water droplets on cool surfaces, while fog is a cloud of water droplets suspended near the ground reducing visibility.
Dew vs. Fog

Key Differences

Dew forms through condensation when surfaces cool down at night, turning water vapor in the air into droplets. Fog, however, is a type of low-lying cloud, created when the air is cooled to the point where it can no longer hold all its water vapor, leading to the formation of tiny water droplets suspended in the air.
Shumaila Saeed
Shumaila Saeed
Jan 03, 2024
Dew appears as tiny droplets on objects like grass or cars, usually seen in the mornings. Fog is a thick, cloud-like presence, obscuring visibility in the air, often found in areas with bodies of water, valleys, and mountains.
Shumaila Saeed
Shumaila Saeed
Jan 03, 2024
Dew forms under clear skies with calm winds, allowing surfaces to cool below the dew point. Fog requires high humidity and typically forms in cool conditions, especially when warm, moist air passes over cooler ground or water.
Shumaila Saeed
Shumaila Saeed
Jan 03, 2024
Dew does not affect visibility as it forms on surfaces. Fog significantly reduces visibility, sometimes to less than 1 kilometer, impacting transportation and outdoor activities.
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Shumaila Saeed
Jan 03, 2024
Dew is more common in areas with warm days and cool nights, aiding in minor water supplementation for plants. Fog is influenced by geographic features and temperature differences and can be a significant weather phenomenon in coastal areas and mountain regions.
Shumaila Saeed
Shumaila Saeed
Jan 03, 2024
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Comparison Chart

Formation

Condensation on cool surfaces
Air cooled to saturation, forms cloud near ground
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Jan 03, 2024

Location

On solid surfaces like plants and cars
Suspended in the air
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Jan 03, 2024

Time of Occurrence

Commonly forms at night and seen in mornings
Can occur any time, often in mornings
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Jan 03, 2024

Visibility Impact

No impact on visibility
Reduces visibility significantly
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Jan 03, 2024

Environmental Needs

Clear skies, calm conditions
High humidity, temperature variations
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Jan 03, 2024
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Dew and Fog Definitions

Dew

A natural form of water, appearing as droplets on plants and other surfaces in the morning.
The farmer appreciated the dew as it provided much-needed moisture for his crops.
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Shumaila Saeed
Dec 19, 2023

Fog

A meteorological phenomenon that reduces visibility to less than 1 km due to water droplets in the air.
The airport was closed due to heavy fog covering the runways.
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Shumaila Saeed
Dec 19, 2023

Dew

The wetness caused by condensed water vapor on outdoor surfaces.
The car was covered in dew after a chilly, clear night.
Shumaila Saeed
Shumaila Saeed
Dec 19, 2023

Fog

A state of the atmosphere in which vision is obscured by a cloud of some substance.
The early morning jog was mystical, with the trail shrouded in a light fog.
Shumaila Saeed
Shumaila Saeed
Dec 19, 2023

Dew

Water droplets condensed from the air, usually at night, onto cool surfaces.
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Dec 13, 2023
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Fog

Condensed water vapor in cloudlike masses lying close to the ground and limiting visibility.
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Dec 13, 2023

Dew

Something moist, fresh, pure, or renewing
"The timely dew of sleep / ... inclines / Our eye-lids" (John Milton).
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Shumaila Saeed
Dec 13, 2023

Fog

An obscuring haze, as of atmospheric dust or smoke.
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Shumaila Saeed
Dec 13, 2023

Dew

Moisture, as in the form of tears or perspiration, that appears in small drops.
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Shumaila Saeed
Dec 13, 2023

Fog

A mist or film clouding a surface, as of a window, lens, or mirror.
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Shumaila Saeed
Dec 13, 2023

Dew

To wet with or as if with dew.
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Shumaila Saeed
Dec 13, 2023

Fog

A cloud of vaporized liquid, especially a chemical spray used in fighting fires.
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Shumaila Saeed
Dec 13, 2023

Dew

(uncountable) Any moisture from the atmosphere condensed by cool bodies upon their surfaces.
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Shumaila Saeed
Dec 13, 2023

Fog

A state of mental vagueness or bewilderment.
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Shumaila Saeed
Dec 13, 2023

Dew

(uncountable) Moisture in the air that settles on plants, etc in the morning or evening, resulting in drops.
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Shumaila Saeed
Dec 13, 2023

Fog

Something that obscures or conceals; a haze
Shrouded their actions in a fog of disinformation.
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Shumaila Saeed
Dec 13, 2023

Dew

An instance of such moisture settling on plants, etc.
There was a heavy dew this morning.
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Shumaila Saeed
Dec 13, 2023

Fog

A blur on a developed photographic image.
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Shumaila Saeed
Dec 13, 2023

Dew

(figurative) Anything that falls lightly and in a refreshing manner.
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Shumaila Saeed
Dec 13, 2023

Fog

A new growth of grass appearing on a field that has been mowed or grazed.
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Shumaila Saeed
Dec 13, 2023

Dew

(figurative) An emblem of morning, or fresh vigour.
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Shumaila Saeed
Dec 13, 2023

Fog

Tall, coarse grass left standing in fields through the winter.
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Shumaila Saeed
Dec 13, 2023

Dew

To wet with, or as if with, dew; to moisten.
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Shumaila Saeed
Dec 13, 2023

Fog

To cover or envelop with fog.
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Shumaila Saeed
Dec 13, 2023

Dew

Moisture from the atmosphere condensed by cool bodies upon their surfaces, particularly at night.
Her tears fell with the dews at even.
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Shumaila Saeed
Dec 13, 2023

Fog

To cause to be obscured; cloud.
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Shumaila Saeed
Dec 13, 2023

Dew

Figuratively, anything which falls lightly and in a refreshing manner.
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Shumaila Saeed
Dec 13, 2023

Fog

To make vague, hazy, or confused
A memory that had been fogged by time.
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Shumaila Saeed
Dec 13, 2023

Dew

An emblem of morning, or fresh vigor.
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Shumaila Saeed
Dec 13, 2023

Fog

To obscure or dim (a photographic image).
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Shumaila Saeed
Dec 13, 2023

Dew

To wet with dew or as with dew; to bedew; to moisten; as with dew.
The grasses grewA little ranker since they dewed them so.
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Shumaila Saeed
Dec 13, 2023

Fog

To be covered with fog.
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Shumaila Saeed
Dec 13, 2023

Dew

Same as Due, or Duty.
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Shumaila Saeed
Dec 13, 2023

Fog

To be blurred, clouded, or obscured
My glasses fogged in the warm air.
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Shumaila Saeed
Dec 13, 2023

Dew

Water that has condensed on a cool surface overnight from water vapor in the air;
In the morning the grass was wet with dew
Shumaila Saeed
Shumaila Saeed
Dec 13, 2023

Fog

To be dimmed or obscured. Used of a photographic image.
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Shumaila Saeed
Dec 13, 2023

Dew

Moisture condensed from the atmosphere, especially at night, onto cool surfaces.
The morning dew glistened on the freshly cut grass.
Shumaila Saeed
Shumaila Saeed
Dec 19, 2023

Fog

(uncountable) A thick cloud that forms near the ground; the obscurity of such a cloud. mist, haze.}}
A bank of fog
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Shumaila Saeed
Dec 13, 2023

Dew

Tiny drops of water that form on cool surfaces at night, when atmospheric vapor condenses.
As the sun rose, dew drops sparkled like diamonds on the spider's web.
Shumaila Saeed
Shumaila Saeed
Dec 19, 2023

Fog

(uncountable) A mist or film clouding a surface.
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Shumaila Saeed
Dec 13, 2023

Dew

A thin film of water formed from condensation by the cooling of the air.
Walking through the meadow, her shoes were soaked by the dew.
Shumaila Saeed
Shumaila Saeed
Dec 19, 2023

Fog

A state of mind characterized by lethargy and confusion.
He did so many drugs, he was still in a fog three months after going through detox.
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Shumaila Saeed
Dec 13, 2023

Fog

(photography) A silver deposit or other blur on a negative or developed photographic image.
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Shumaila Saeed
Dec 13, 2023

Fog

(computer graphics) Distance fog.
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Shumaila Saeed
Dec 13, 2023

Fog

A new growth of grass appearing on a field that has been mowed or grazed.
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Shumaila Saeed
Dec 13, 2023

Fog

Tall and decaying grass left standing after the cutting or grazing season.
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Shumaila Saeed
Dec 13, 2023

Fog

(Scotland) Moss.
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Shumaila Saeed
Dec 13, 2023

Fog

(intransitive) To become covered with or as if with fog.
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Shumaila Saeed
Dec 13, 2023

Fog

(intransitive) To become obscured in condensation or water.
The mirror fogged every time he showered.
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Shumaila Saeed
Dec 13, 2023

Fog

To become dim or obscure.
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Shumaila Saeed
Dec 13, 2023

Fog

To make dim or obscure.
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Shumaila Saeed
Dec 13, 2023

Fog

To spoil (film) via exposure to light other than in the normal process of taking a photograph.
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Shumaila Saeed
Dec 13, 2023

Fog

(transitive) To cover with or as if with fog.
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Shumaila Saeed
Dec 13, 2023

Fog

(transitive) To disperse insecticide into (a forest canopy) so as to collect organisms.
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Shumaila Saeed
Dec 13, 2023

Fog

(transitive) To obscure in condensation or water.
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Shumaila Saeed
Dec 13, 2023

Fog

(transitive) To make confusing or obscure.
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Shumaila Saeed
Dec 13, 2023

Fog

To practice in a small or mean way; to pettifog.
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Shumaila Saeed
Dec 13, 2023

Fog

(transitive) To pasture cattle on the fog (of), or aftergrass, of; to eat off the fog from (a field).
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Shumaila Saeed
Dec 13, 2023

Fog

(intransitive) To become covered with the kind of grass called fog.
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Shumaila Saeed
Dec 13, 2023

Fog

A second growth of grass; aftergrass.
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Shumaila Saeed
Dec 13, 2023

Fog

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.
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Shumaila Saeed
Dec 13, 2023

Fog

A state of mental confusion.
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Shumaila Saeed
Dec 13, 2023

Fog

Cloudiness or partial opacity of those parts of a developed film or a photograph which should be clear.
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Shumaila Saeed
Dec 13, 2023

Fog

To pasture cattle on the fog, or aftergrass, of; to eat off the fog from.
Shumaila Saeed
Shumaila Saeed
Dec 13, 2023

Fog

To practice in a small or mean way; to pettifog.
Where wouldst thou fog to get a fee?
Shumaila Saeed
Shumaila Saeed
Dec 13, 2023

Fog

To envelop, as with fog; to befog; to overcast; to darken; to obscure.
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Shumaila Saeed
Dec 13, 2023

Fog

To render semiopaque or cloudy, as a negative film, by exposure to stray light, too long an exposure to the developer, etc.
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Shumaila Saeed
Dec 13, 2023

Fog

To show indistinctly or become indistinct, as the picture on a negative sometimes does in the process of development.
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Shumaila Saeed
Dec 13, 2023

Fog

Droplets of water vapor suspended in the air near the ground
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Shumaila Saeed
Dec 13, 2023

Fog

An atmosphere in which visibility is reduced because of a cloud of some substance
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Shumaila Saeed
Dec 13, 2023

Fog

Confusion characterized by lack of clarity
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Shumaila Saeed
Dec 13, 2023

Fog

Make less visible or unclear;
The stars are obscured by the clouds
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Shumaila Saeed
Dec 13, 2023

Fog

A thick cloud of tiny water droplets suspended in the atmosphere at or near the earth's surface.
The city was enveloped in a thick fog, making the morning commute challenging.
Shumaila Saeed
Shumaila Saeed
Dec 19, 2023

Fog

A mass of small water droplets or ice crystals in the air near the ground, limiting visibility.
The fog was so dense that the lighthouse's beam was barely visible.
Shumaila Saeed
Shumaila Saeed
Dec 19, 2023

Fog

An opaque mass of cloud water droplets suspended close to the ground.
As they drove through the mountain pass, the fog grew thicker and visibility worsened.
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Shumaila Saeed
Dec 19, 2023

Repeatedly Asked Queries

Can dew be a source of water for plants?

Yes, dew can provide a small but significant source of moisture for plants, especially in arid regions.
Shumaila Saeed
Shumaila Saeed
Jan 03, 2024

Does dew form more frequently in certain climates?

Dew is more common in areas with warm days and cooler nights, as these conditions are conducive to its formation.
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Shumaila Saeed
Jan 03, 2024

What causes dew to form?

Dew forms when the temperature of a surface cools down below the dew point, causing water vapor in the air to condense into droplets.
Shumaila Saeed
Shumaila Saeed
Jan 03, 2024

Is fog considered a type of cloud?

Yes, fog is essentially a cloud that forms very close to the ground.
Shumaila Saeed
Shumaila Saeed
Jan 03, 2024

What conditions lead to fog formation?

Fog forms when the air is cooled to its dew point, and there's enough moisture in the air, often in conditions of calm winds and clear skies.
Shumaila Saeed
Shumaila Saeed
Jan 03, 2024

Can fog occur at any time of day?

Yes, while fog is common in the morning, it can occur at any time, especially in coastal areas or during temperature changes.
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Shumaila Saeed
Jan 03, 2024

How does humidity affect dew formation?

Higher humidity levels increase the likelihood of dew formation, as there is more moisture in the air to condense.
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Shumaila Saeed
Jan 03, 2024

Is dew only seen in the mornings?

Dew typically forms overnight and is most visible in the early morning, though it can form at other times under the right conditions.
Shumaila Saeed
Shumaila Saeed
Jan 03, 2024

Can dew form indoors?

Dew generally forms outdoors, but similar condensation can occur on cold surfaces indoors under high humidity conditions.
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Jan 03, 2024

What role does temperature play in fog formation?

Temperature plays a crucial role; fog forms when the air temperature drops to the dew point, causing moisture in the air to condense.
Shumaila Saeed
Shumaila Saeed
Jan 03, 2024

Are there health risks associated with fog?

Fog itself is not harmful, but it can carry pollutants and allergens, which may pose health risks, especially in urban areas.
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Shumaila Saeed
Jan 03, 2024

How does fog affect driving conditions?

Fog can greatly reduce visibility, making driving conditions hazardous. It's advisable to use fog lights and drive cautiously in foggy conditions.
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Shumaila Saeed
Jan 03, 2024

What are the different types of fog?

Common types of fog include radiation fog, advection fog, evaporation fog, and ice fog.
Shumaila Saeed
Shumaila Saeed
Jan 03, 2024

Does dew have any practical uses?

Apart from providing moisture, dew has limited practical uses, though it's often used as a metaphor in literature and poetry.
Shumaila Saeed
Shumaila Saeed
Jan 03, 2024

Can dew be collected for water?

In theory, dew can be collected for water, but it's usually not practical due to the small amounts produced.
Shumaila Saeed
Shumaila Saeed
Jan 03, 2024

Can dew be harmful to any surfaces or materials?

While generally harmless, dew can contribute to rust on metal surfaces and mildew growth on some materials if left unchecked.
Shumaila Saeed
Shumaila Saeed
Jan 03, 2024

Is there a way to predict dew formation?

Dew formation can be predicted by monitoring temperature and humidity levels, and knowing the local dew point.
Shumaila Saeed
Shumaila Saeed
Jan 03, 2024

How does geography affect fog?

Geography significantly affects fog; coastal areas and valleys are more prone to fog due to their specific climatic conditions.
Shumaila Saeed
Shumaila Saeed
Jan 03, 2024

What is the main difference between mist and fog?

The main difference is visibility; fog reduces visibility to less than 1 km, while mist allows visibility greater than 1 km.
Shumaila Saeed
Shumaila Saeed
Jan 03, 2024

Does fog impact air travel?

Yes, fog can significantly impact air travel by reducing visibility, leading to flight delays and cancellations.
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Shumaila Saeed
Jan 03, 2024

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About Author
Shumaila Saeed
Written by
Shumaila Saeed
Shumaila Saeed, an expert content creator with 6 years of experience, specializes in distilling complex topics into easily digestible comparisons, shining a light on the nuances that both inform and educate readers with clarity and accuracy.

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