Sofia has a continental climate characterized by warm summer temperatures (with the thermometer above 30ºC) and cold winters with minimum temperatures that can drop below -15ºC and frequent snowfalls.
The Autumn and Spring seasons in Sofia tend to have variable weather from one day to the next.
If you are travelling to Sofia, bear all this in mind when packing your suitcase. In winter it is important to wear warm clothes and sturdy footwear such as boots for walking on snow and ice on the pavements, but in summer you should wear comfortable clothes, shorts and T-shirts.