According to an old legend, the present-day territory of Tbilisi was covered by forests as late as 458. One widely accepted variant of the legend of Tbilisi's founding states that King Vakhtang I Gorgasali of Georgia went hunting in the heavily wooded region with a falcon(sometimes the falcon is replaced with either a hawk or other small birds of prey in the legend). The King's falcon allegedly caught or injured a pheasant during the hunt, after which both birds fell into a nearby hot spring and died from burns. King Vakhtang became so impressed with the hot springs that he decided to cut down the forest and build a city on the location. The name Tbilisi derives from the Old Georgian word "Tbili" (თბილი), meaning warm. The name 'Tbili' or 'Tbilisi' ('warm location') was therefore given to the city because of the area's numerous sulphuric hot springs that came out of the ground. Archaeological studies of the region have indicated human settlement in the territory of Tbilisi as early as the 4th millennium BCE.

King Dachi I Ujarmeli, who was the successor of Vakhtang I Gorgasali, moved the capital from Mtskheta to Tbilisi according to the will left by his father. Tbilisi was not the capital of a unified Georgian state at that time and did not include the territory of Colchis. It was, however, the capital city of Eastern Georgia/Iberia. During his reign, King Dachi I oversaw the construction of the fortress wall that lined the city's new boundaries. From the 6th century, Tbilisi grew at a steady pace due to the region's favourable and strategic location which placed the city along important trade and travel routes between Europe and Asia.

 

Location

Tbilisi is located in the South Caucasus at 41° 43' North Latitude and 44° 47' East Longitude. The city lies in Eastern Georgia on both banks of the Mt'k'vari River. The elevation of the city ranges from 380–770 metres above sea level (1,250–2,530 ft) and has the shape of an amphitheatre surrounded by mountains on three sides. To the north, Tbilisi is bounded by the Saguramo Range, to the east and south-east by the Iori Plain, to the south and west by various endings (sub-ranges) of the Trialeti Range.

The relief of Tbilisi is complex. The part of the city which lies on the left bank of the Mt'k'vari (Kura) River extends for more than 30 km (19 mi) from the Avchala District to River Lochini. The part of the city which lies on the right side of the Mt'k'vari River on the other hand is built along the foothills of the Trialeti Range, the slopes of which in many cases descend all the way to the edges of the river Mt'k'vari. The mountains, therefore, are a significant barrier to urban development on the right bank of the Mt'k'vari River. This type of a geographic environment creates pockets of very densely developed areas while other parts of the city are left undeveloped due to the complex topographic relief.

To the north of the city, there is a large reservoir (commonly known as the Tbilisi Sea) fed by irrigation canals.

 

Climate

The climate of Tbilisi can be classified as moderately humid subtropical (Köppen climate classification Cfa). The city's climate is influenced both by dry (Central Asian/Siberian) air masses from the east and humid subtropical (Atlantic/Black Sea) air masses from the west. Tbilisi experiences relatively cold winters and hot summers. Because the city is bounded on most sides by mountain ranges, the close proximity to large bodies of water (Black and Caspian Seas) and the fact that the Greater Caucasus Mountain Range (further to the north) blocks the intrusion of cold air masses from Russia, Tbilisi has a relatively mild micro-climate compared to other cities that possess a similar continental climate along the same latitudes.

The average annual temperature in Tbilisi is 12.7 °C (54.9 °F). January is the coldest month with an average temperature of 0.9 °C (33.6 °F). July is the hottest month with an average temperature of 24.4 °C (75.9 °F). The absolute minimum recorded temperature is −24 °C (−11 °F) and the absolute maximum is 40 °C (104 °F). Average annual precipitation is 568 mm (22.4 in). May and June are the wettest months (averaging 84 mm (3.3 in) of precipitation each) while January is the driest (averaging 20 mm (0.8 in) of precipitation). Snow falls on average 15–25 days per year. The surrounding mountains often trap the clouds within and around the city, mainly during the Spring and Autumn months, resulting in prolonged rainy and/or cloudy weather. Northwesterly winds dominate in most parts of Tbilisi throughout the year. Southeasterly winds are common as well.