Four people died of biting cold in Hathras, followed by three in Kanpur Dehat, two each in Mirzapur and Lalitpur and one each in Chitrakoot and Banda districts.
Muzaffarnagar and Kanpur City remained the coldest places with each recording a minimum of 2 degrees, Met office sources said.
Mercury continued to remain below normal in most parts of the state, dipping by as much as 6 to 11 degrees in some areas.
Night temperatures fell in Allahabad division, and were below normal in Gorakhpur, Varanasi,Faizabad, Allahabad Kanpur, Lucknow, Bareilly, Moradabad and Meerut divisions.
According to Met forecast, while dense fog is likely to descend over eastern parts of the state, Western UP will witness a misty weather.
Visibility may come down to 200 metres or below due to the fog.