Which Tube Lines Are The Hottest?

This map is based on temperature readings from August 2013 (Picture: TfL)

Is there anything worse than being crammed into a confined tube carriage with hundreds of other commuters while sweating profusely? Not much.

Well, in light of the fact that tube temperatures are exceeding the maximum legal temperatures for transporting cattle - CityMetric have ranked each line of the London Underground based on their temperatures.

No surprises that the Central Line leads the pack with temperature readings of over 33 degrees Celcius, low ceiling carriages and no recent cooling improvements.

Low down on the list are the Metropolitan, Circle and Hammersmith and City lines due to the fact they have air conditioning installed in their carriages.

As the District Line is currently introducing air-con thus explaining its place at number eight.

The fact that London Overground and DLR are cool must have a lot to do with the fact they stay above ground allowing heat to escape the carriages regularly at each stop.

Here is the list in full from Hottest to coolest:

1. Central Line

2. Bakerloo

3. Piccadilly

4. Northern

5. Waterloo & City

6. Victoria

7. Jubilee

8. District

9. DLR

10. Circle

11. Hammersmith & City

12. Metropolitan

13. London Overground

The problem with the so-called ‘deep level’ lines is that they don’t have the space to have air-conditioning installed with nowhere for the heat to go one if it did escaped - easily explaining why the top seven spots are held by such tube lines.

So our advice, avoid the Central Line at all cost unless you want your face to match its designated colour…Oh and always have a bottle of water with you.