Main article: Climate of Georgia (country)
The climate of Georgia is extremely diverse, considering the nation's small size. There are two main climatic zones, roughly corresponding to the eastern and western parts of the country. The Greater Caucasus Mountain Range plays an important role in moderating Georgia's climate and protects the nation from the penetration of colder air masses from the north. The Lesser Caucasus Mountains partially protect the region from the influence of dry and hot air masses from the south.
The Black Sea coast of Batumi, western Georgia
Much of western Georgia lies within the northern periphery of the humid subtropical zone with annual precipitation ranging from 1,000–4,000 mm (39.4–157.5 in). The precipitation tends to be uniformly distributed throughout the year, although the rainfall can be particularly heavy during the Autumn months. The climate of the region varies significantly with elevation and while much of the lowland areas of western Georgia are relatively warm throughout the year, the foothills and mountainous areas (including both the Greater and Lesser Caucasus Mountains) experience cool, wet summers and snowy winters (snow cover often exceeds 2 meters in many regions). Ajaria is the wettest region of the Caucasus, where the Mt. Mtirala rainforest, east of Kobuleti, receives around 4,500 mm (177.2 in) of precipitation per year.
Eastern Georgia has a transitional climate from humid subtropical to continental. The region's weather patterns are influenced both by dry Caspian air masses from the east and humid Black Sea air masses from the west. The penetration of humid air masses from the Black Sea is often blocked by mountain ranges (Likhi and Meskheti) that separate the eastern and western parts of the nation. Annual precipitation is considerably less than that of western Georgia and ranges from 400–1,600 mm (15.7–63.0 in).
The wettest periods generally occur during spring and autumn, while winter and summer months tend to be the driest. Much of eastern Georgia experiences hot summers (especially in the low-lying areas) and relatively cold winters. As in the western parts of the nation, elevation plays an important role in eastern Georgia where climatic conditions above 1,500 metres (4,921 ft) are considerably colder than in the low-lying areas. The regions that lie above 2,000 metres (6,562 ft) frequently experience frost even during the summer months.
Georgia is mostly situated in the South Caucasus, while parts of the country are also located in the North Caucasus. The country lies between latitudes 41° and 44° N, and longitudes 40° and 47° E, with an area of 67,900 km2 (26,216 sq mi). It is a very mountainous country. The Likhi Range divides the country into eastern and western halves. Historically, the western portion of Georgia was known as Colchis while the eastern plateau was called Iberia. Because of a complex geographic setting, mountains also isolate the northern region of Svaneti from the rest of Georgia.
The Greater Caucasus Mountain Range forms the northern border of Georgia. The main roads through the mountain range into Russian territory lead through the Roki Tunnel between Shida Kartli and North Ossetia and the Darial Gorge (in the Georgian region of Khevi). The Roki Tunnel was vital for the Russian military in the 2008 Russo-Georgian War because it is the only direct route through the Caucasus Mountains. The southern portion of the country is bounded by the Lesser Caucasus Mountains. The Greater Caucasus Mountain Range is much higher in elevation than the Lesser Caucasus Mountains, with the highest peaks rising more than 5,000 meters (16,404 ft) above sea level.
The highest mountain in Georgia is Mount Shkhara at 5,068 meters (16,627 ft), and the second highest is Mount Janga (Dzhangi–Tau) at 5,059 m (16,598 ft) above sea level. Other prominent peaks include Mount Kazbek at 5,047 m (16,558 ft), Shota Rustaveli 4,860 m (15,945 ft), Tetnuldi 4,858 m (15,938 ft), Mt. Ushba 4,700 m (15,420 ft), and Ailama 4,547 m (14,918 ft). Out of the abovementioned peaks, only Kazbek is of volcanic origin. The region between Kazbek and Shkhara (a distance of about 200 km (124 mi) along the Main Caucasus Range) is dominated by numerous glaciers. Out of the 2,100 glaciers that exist in the Caucasus today, approximately 30% are located within Georgia.
Tusheti region in northeast Georgia