Tbilisi has a humid subtropical climate that has significant rainfall throughout the year with no dry months. Bounded by the mountains, the city's climate is hugely influenced by the air masses that blow from the Caspian and the Black Sea. The average annual temperature in Tbilisi is around 13 degree Celsius.
Spring (March - May): There is a rise in the temperature scale during the start of the spring and the season is totally mild with a moderate temperature that comes along with a lot of rainfall, especially in the month of May.
Summer (June - August): The city of Tbilisi experiences warm summers and the month of July is the hottest month with an average temperature of 24.9 degree Celsius.
Autumn (September - October): There is a sudden drop in the temperature during this time of the year and due to the presence of the mountains on all its sides, the clouds get trapped within the city resulting in a cloudy and a rainy weather.
Winter (November - February): Winters in Tbilisi are moderately cold, except during the month of January, when the temperature comes down to as low as 2.3 degree Celsius which is also accompanied by the occasional snowfall.
The best time to visit Tbilisi in Georgia is during the spring and the autumn season.