On Saturday, day temperatures fell appreciably in Varanasi, Allahabad, Kanpur, Jhansi and Agra, the official said.
Similarly, night temperatures appreciably rose in Meerut.
The lowest minimum temperature in the state was recorded in Lakhimpur Kheri at 6.4 degrees Celsius, he said.
The MeT department warned that cold wave conditions are very likely to prevail at a few places over East Uttar Pradesh on January 2, 2018 and at isolated places on January 3, 2018.