The Natural Potential of Mountains in Bulgaria and Its Sustainable Use - Sustainable Development in Mountain Regions: Southeastern Europe - page 49

Table 5.2 Mean and extreme air temperatures ( t ◦ S ) by altitude belts

Extreme temperatures

Mean monthly t Maximal Minimal

Altitude
belts (m)

Mean
annual t

Temp.
amplitude Winter I/II VII/III Summer Autumn Spring Winter Summer Autumn Spring

0-200 1-2 > 22 > 12 30 > 40 > 30 > 30

200-600 0-1 20-21 10-11 25 40 30 30

600-1,000 0 to -2 18-19 7-9 20 35 30 30

1,000-1,600 -3 to -4 16-17 4-6 15 30 25 20

1,600-2,200 -5 to -7 14-15 1-3 10 20 15 10

> 2,200 <-7 < 14 < 0 15 < 15 < 10

Source of information: Moraliiski and Gocheva, in: The natural and economic potential of the mountains in Bulgaria, 1989 (with additions).