site.btaThe Weather on September 20
Lows: 11C to 16C, lower along the coast, around 12C in Sofia. Mainly sunny weather. Cumulus cloud to gather after noon over the mountains and western parts, isolated rain showers and thunder. Light wind. Highs: 25C to 30C, around 26C in Sofia.
The Black Sea coast: Sunny weather. Light southeasterly wind. Highs: 24C to 26C. Seawater: 23C to 25C.
The mountains: Sunny weather. Cumulus cloud to gather after noon, bringing isolated rain and thunder. Light to moderate northwesterly wind. Highs: 20C at 1,200 m, 13C at 2,000 m.
Source: National Institute of Meteorology and Hydrology