The entire state of Telangana is in the grip of a cold wave, even as Hyderabad witnessed its coldest day in six years on Wednesday.

According to reports, night temperatures on Wednesday plunged to 10.8 degree Celsius, the lowest since 2010, even as Adilabad stood at 4 degrees Celsius, followed by Medak at 7 degrees Celsius, Khammam and Badrachalam at 9 degrees Celsius, and Nalgonda district at 15 degrees Celsius, Deccan Chronicle reported. 

The all-time lowest weather that Hyderabad witnessed, was 7.1 degrees on December 14, 1966.

The Indian Meteorological Department (IMD) has also issued a two-day warning to people in several parts of the state.

"Cold wave conditions very likely to prevail at isolated places in the districts of Adilabad, Nizamabad, Medak, Karimnagar and Khammam in Telangana," the warning reads.

"A low pressure area is likely to develop over south Andaman sea and adjoining southeast Bay of Bengal around December 25," the IMD predicted.

The IMD declares an official 'cold wave', if there a deviation of more than 4 degrees Celsius from the expected minimum temperature.

Skymet Weather attributed the sudden drop in temperature to dry and cold winds from North and North-Easterly direction, adding that clear skies over Telangana, is making the temperature drop further.

The weather is also resulting in a lot of fog in the city, early in the mornings.

"Fog and haze will greatly hamper visibility. Fog is a condensed droplet containing cloud and haze is a mix of smoke and dust due to pollution. Visibility will be relatively better during haze than when fog is formed. Due to fog, visibility will sometimes be less than 10m, resulting in road mishaps. While there is a fog forecast in Hyderabad until December 24, for December 25 and 26, it is a mist forecast. Mist is floating droplets in air and ground moisture," IMD director YK Reddy told the Times of India.