According to the Met office, maximum temperature was below normal by 6 to 13 degrees in many parts of the state and cold wave conditions would prevail during the next 48 hours.
Weather was mainly dry over the state and night temperature rose marginally in Varanasi, Allahabad divisions and changed little elsewhere.
The department said that weather would be mainly dry over the state. Ground frost would occur at some parts of the state during next two nights.
Very dense fog with visibility of 100 metre or less would prevail over many parts of eastern UP during next 48 hours.