Five Tube lines were either part suspended or suffering from severe delays due to the adverse weather.
Signal failures caused by ice and snow created severe delays on the District line between Edgware and Wimbledon on Wednesday morning, Transport for London said.
The Central line was part suspended while engineers worked to fix a faulty train which caused no service between Woodford and Epping.
Meanwhile commuters travelling on the Piccadilly line faced severe delays due to signal failings at King’s Cross, Arnos Grove and Hammersmith.
Commuters were held up on the Jubilee line due to the absence of train operators.
A string of technical issues caused minor delays on the London Overground with a points failures at Kilburn High Road causing services to slow between Euston and Watford.
There was no service between Edmonton Green and Cheshnut due to overhead problems and a faulty train caused minor delays between Stratford and Richmond.
Harsh weather conditions created severe delays on TfL Rail, the transport company said that the Underground and buses are accepting tickets on reasonable routes.
There is currently a good service on all other lines.
The travel chaos came amid severe weather warnings from the Met Office.
A yellow weather warning was in place across the city with heavy snow showers expected throughout the day.
Commuters were warned of wide spread travel disruption and cancellations on rail travel.