site.btaThe Weather on December 21

Foggy in the valleys and lowlands in southwestern Bulgaria and the Upper Thracian Plain before noon. Moderate northwesterly wind, temporarily strong wind in the Danubian Plain will bring cold air. Lows: -3C to 2C, 0C in Sofia. Highs: 5C to 10C, 5C in Sofia.

Black Sea coast: Variable clouds. Moderate northwesterly wind (moderate to strong in the northern parts). Highs: 8C to 10C. Seawater temperature: 9C to 10C. Sea waves: 1-2 degrees Douglas (3 degrees Douglas in the northernmost parts)

Mountains: Variable clouds. Strong northwesterly wind. Highs: 5C at 1,200 metres, -1C at 2,000 metres.

Source: National Institute of Meteorology and Hydrology