The mercury dropped below four degrees Celsius in most parts of the state even as the day temperatures plummeted below 10 degrees Celsius. Although the thick fog cover has receded in some regions, cold winds continued to add to the troubles of the people.
The Met Office in the state capital Lucknow does not see any respite from the cold weather conditions in coming days. A weather official said the dense fog in the state would make things "far more difficult" in the next few days.
Although the state government has made arrangements of shelter homes and bonfires for the poor and the homeless, 37 people perished after the cold wave conditions set in across the state last week.
The thick fog cover has also hit the rail and air traffic in the state. Many trains were running behind schedule, especially those coming from Punjab, Bihar and Delhi, a railways official said.