Lucknow, Jan 2 (IANS): Despite a sunny day, Uttar Pradesh continued to reel under extreme cold wave conditions Wednesday.

The regional Met Office said inclement weather would continue for most part of the week, and there are good chances that fog may reappear.

Banda, Sonebhadra, Bhadohi, Rampur and Etawah were worst-hit by the cold wave with day temperatures slipping down to around 17 degrees Celsius and night temperatures hovering between four and five degrees.

In state capital Lucknow, the lowest temperature since Tuesday was 4.3 degrees while the maximum was 17 degrees.

Regional Met Office director J.P. Gupta told IANS that eastern and western parts of the state would see fog by Thursday.

The onset of north-westerly winds was likely to bring back the chill, he said.

Rail, road and air traffic continued to be hit by fog and more than a dozen trains were running hours behind schedule.

The Shatabdi Express between Delhi and Lucknow was running late by more than four hours.