Relationship between dew-point and temperature

[Cheese Rice]

Relationship between dew-point and temperature  

 

It's 15.c here (Leeds) with a dew-point of -3, I'm confused as to why this happens, I know there can be a big variation at times but this seems excessive.  

 

Ive tried searching this on-line but it doesn't seem to be coming up with anything. 

 

 

[Mapantz]

Relationship between dew-point and temperature   It's 15.c here (Leeds) with a dew-point of -3, I'm confused as to why this happens, I know there can be a big variation at times but this seems excessive.   Ive tried searching this on-line but it doesn't seem to be coming up with anything.

It's as simple as low humidity, low moisture content means the temperature would have to fall rather low (below frost/dew point) before vapour turns to a liquid.

[johnholmes]

Is this any help?

http://weatherfaqs.org.uk/node/45