dew-point spread: meaning, definition, pronunciation and examples
C1-C2 (Technical)Technical, Scientific
Quick answer
What does “dew-point spread” mean?
The numerical difference between the air temperature and the dew point temperature.
Audio
Pronunciation
Definition
Meaning and Definition
The numerical difference between the air temperature and the dew point temperature.
A meteorological parameter indicating how far the atmosphere is from saturation; a smaller spread suggests higher relative humidity and a greater likelihood of fog or precipitation.
Dialectal Variation
British vs American Usage
Differences
No significant lexical differences. Both use the same term.
Connotations
Purely technical, with no additional cultural connotations.
Frequency
Used with equal frequency in professional meteorological contexts in both regions. Virtually absent from everyday speech.
Grammar
How to Use “dew-point spread” in a Sentence
The dew-point spread [is/was] [number] degrees.A [narrow/wide] dew-point spread indicates...Vocabulary
Collocations
Examples
Examples of “dew-point spread” in a Sentence
adjective
British English
- The dew-point-spread data was crucial for the forecast.
American English
- We need a dew-point-spread analysis for the flight plan.
Usage
Meaning in Context
Business
Rare, except in industries like agriculture, aviation, or energy where detailed weather data is critical.
Academic
Common in meteorology, climatology, and environmental science papers and textbooks.
Everyday
Extremely rare. An everyday speaker would say 'how humid it is' or 'the chance of fog'.
Technical
The primary domain. Used in weather reports, forecasts, pilot briefings, and scientific analyses.
Vocabulary
Synonyms of “dew-point spread”
Strong
Neutral
Weak
Vocabulary
Antonyms of “dew-point spread”
Watch out
Common Mistakes When Using “dew-point spread”
- Incorrectly writing as 'dewpoint spread' (missing hyphen in the compound modifier).
- Confusing it with 'relative humidity' (a percentage, not a temperature difference).
FAQ
Frequently Asked Questions
No. Relative humidity is a percentage. Dew-point spread is a temperature difference (e.g., 5°C). They are related but convey information differently.
It indicates the air is close to saturation, drastically increasing the risk of fog or cloud formation that can reduce visibility and ceiling.
No. By definition, the air temperature is always equal to or greater than the dew point temperature, so the spread is zero or positive.
When saying 'It's so humid, it feels like it's about to rain' – they are describing a situation where the dew-point spread is perceptibly small.
The numerical difference between the air temperature and the dew point temperature.
Dew-point spread is usually technical, scientific in register.
Dew-point spread: in British English it is pronounced /ˈdjuː pɔɪnt spred/, and in American English it is pronounced /ˈduː pɔɪnt spred/. Tap the audio buttons above to hear it.
Phrases
Idioms & Phrases
- “None”
Learning
Memory Aids
Mnemonic
Think of 'spread' like the gap between two runners: Air Temperature and Dew Point. The smaller the gap, the closer they are to 'catching' each other, which means condensation (like dew) happens.
Conceptual Metaphor
A GAP or DISTANCE indicating the 'room' available for the air to hold more water vapour before it becomes full (saturated).
Practice
Quiz
What does a 'dew-point spread' of 10°C primarily indicate?