As you embark on the Sultan’s Trail from Belgrade to Sofia in January, you'll experience a variety of weather conditions, primarily characterized by cold temperatures and mixed precipitation. The initial part of your journey through Serbia presents average highs ranging from 5°C to 6°C, with lows commonly dipping to around -1°C to -3°C. Throughout this section, expect a mix of partly cloudy days and overcast skies, with occasional sunny spells. Precipitation tends to vary, but it's generally light to moderate, with occasional light freezing rain and patchy rain showers.
As you continue towards Bulgaria and get closer to Sofia, the weather becomes progressively colder, with average high temperatures dropping to around 0°C to 2°C and lows reaching between -6°C to -7°C. This region tends to experience increased cloud cover, with overcast skies more common, accompanied by a higher likelihood of light freezing rain and patchy snow. Precipitation is more variable here, with moderate to heavy snow showers possible and an increase in average daily precipitation. Expect occasional sunny periods amidst the generally overcast conditions.
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