Country's lowest temperature was recorded at 6.5 degrees Celsius in Naogaon district on Friday morning.
Naogaon Met office teleprinter operator Ripon Ahmed confirmed the matter to Banglanews.
He also said the district recorded lowest 6.7 degrees Celsius temperature in the previous day.
A mild cold wave is sweeping across the country since Wednesday and it may continue for three more days, according to weather forecast.
BDST: 1320 HRS, JAN 15, 2021