The Sultans Trail from Belgrade to Sofia spans various geographical regions, beginning in Serbia and ending in Bulgaria. In Serbia, from Belgrade to Niš, you typically experience warm to mild temperatures in September, with average highs ranging from 29°C to 24°C and lows from 17°C to 14°C. This part of the journey is predominantly sunny, with occasional instances of partly cloudy skies and patchy rain. The overall rainfall is relatively low, generally not exceeding 2 mm per day.
As you continue south into Bulgaria, the route from Niš to Sofia becomes slightly cooler, with average highs dropping to around 21°C and lows hovering between 12°C and 9°C. The frequency of sunny days remains high, but there is a notable increase in rain occurrences, including moderate or heavy rain showers, particularly towards Sofia. This part of the journey features a mix of weather conditions, from sunny intervals to heavier precipitation, with average daily precipitation tending to be higher, especially in places like Sofia where it can reach over 4 mm.
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