The territory of Central Balkan National Park is a veritable crossroads of winds and clouds, which combine to make its very peculiar climate. While mountainous climatic conditions apply for altitudes over 1000 m. above sea level, the northern slopes fall squarely in the moderate-continental zone, and the southern, in the transitional-continental, with a marked transitional-Mediterranean influence from the South.
Characteristic of the Central Balkan weather scene are strong, oftentimes stormy winds, torrential horizontal and vertical rains, thick fogs, low overall temperatures, mostly cloudy conditions with thick and substantial clouds. Strong, gusty winds are the norm here: along the mountain ridge, winds of 10 meters per second or over can be expected for more than 150 days year-round. The fjon, or turbulent southern wind characteristic of the spring season, can reach speeds up to 18-20 mps. Conversely, the bora, or northern winds, brings arctic frost over the ridge to the southern slopes.
In the higher reaches of the mountain, winters are frosty, with average January temperatures oscillating between 9 and 3°C below zero. The snow cover lasts for about 6 months and reaches 180-220 cm. in thickness by the end of March. The Central Balkan ridges are, more often than not, shrouded in thick fog. The number of rainy or humid days exceeds 280 annually, and the area of Ambaritsa Chalet is the record holder for precipitation nation-wide: 1,360 l per sq m.
Spring comes suddenly and lasts short; summer is cool and rainy. Fall is relatively more stable weather-wise and is suitable for tourism.
Frequent and abrupt changes in the weather pattern are characteristic of this part of the mountain, the main ridge and, mostly, the highest peaks, those above 1900 m. Characteristic in that respect is the Botev Peak massif (also known by its Turkish name, Yumruk Chal), where the weather can change beyond recognition in a matter of minutes. Botev Peak is also the most foggy (over 305 days of fog year-round) and windiest places in Bulgaria.