The Sultans Trail route from Sofia to Istanbul generally experiences cold winter temperatures if you begin in January. At the starting point in Sofia and its surrounding areas in Bulgaria, the climate is cold with average high temperatures ranging from 5°C to -3°C, and average lows typically between -10°C and -2°C. Rainfall tends to be moderate, with snowfall possible, especially in higher elevations. This region sees a mix of sunny, cloudy, and overcast days, with occasional rain, snow, and freezing rain.
As you approach the regions closer to Turkey, such as Edirne and Kirklareli, the temperatures become slightly milder, with average highs around 9°C to 10°C and lows not dropping much below 1°C. Precipitation in this region can be more frequent, with moderate to heavy rain showers being common. Overcast and partly cloudy skies dominate, with intermittent sunny days breaking the cloud cover.
Approaching Istanbul, the weather continues to show slightly milder temperatures with highs around 8°C to 10°C, although rain remains a regular feature. The weather consists of frequent patchy rain and moderate rain showers, with a mix of cloudy and sunny intervals. Overall, the journey from Sofia to Istanbul during this time of year encompasses a variety of winter weather conditions, requiring preparedness for both cold temperatures and significant precipitation.
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