Tbilisi, Georgia is at 41°40'N, 44°57'E, 427 m (1401 ft). See map.
Tbilisi has a humid subtropical climate that is mild with no dry season, constantly moist (year-round rainfall). Summers are hot and muggy with thunderstorms. Winters are mild with precipitation from mid-latitude cyclones. Seasonality is moderate. (Köppen-Geiger classification: Cfa).
According to the Holdridge life zones system of bioclimatic classification Tbilisi is situated in or near the cool temperate steppe biome.
The mean annual temperature is 13 degrees Celsius (55.4 degrees Fahrenheit). See the temperatures page for a monthly breakdown and the fixed scale graph.
Average monthly temperatures vary by 22.7 °C (40.9°F). This indicates that the continentality type is continental, subtype subcontinental.
In the winter time records indicate temperatures by day reach 6.7°C (44°F) on average falling to -1.3°C (29.6°F) overnight.
In spring time temperatures climb reaching 17.7°C (63.8°F) generally in the afternoon with overnight lows of 7°C (44.6°F).
During summer average high temperatures are 29.7°C (85.4°F) and average low temperatures are 18°C (64.4°F).
Come autumn/ fall temperatures decrease achieving average highs of 19.7°C (67.4°F) during the day and lows of 9.3°C (48.8°F) generally shortly after sunrise.
Total annual Precipitation averages 495.5 mm (19.5 inches) which is equivalent to 495.5 Litres/m² (12.15 Gallons/ft²).
On average there are 2112 hours of sunshine per year. Visit the sunshine and daylight section to check monthly details including how high in the sky the sun reaches each month.
Were you to burrow down through the centre of the Earth from Tbilisi you would pop up nearest to the climate station at Adamstown, Pitcairn Islands where you would find a Tropical wet climate.