Tbilisi, the capital of Georgia, sits in a narrow valley of the Kura River in the east of the country, ringed by hills on three sides at around 380–600 metres above sea level, at approximately 41.72°N, 44.78°E. Sheltered from the Black Sea by the Likhi range, it has a humid subtropical climate with a continental edge (Köppen Cfa) — hot summers and cool, damp winters — with rainfall spread through the year.

Summer, from June to August, is hot and often dry, with July and August the warmest months — average highs around 31–32°C — and heatwaves that can exceed 38°C, as the enclosed valley traps warmth with little breeze. Humidity is moderate, evening thunderstorms are frequent, and the nights cool somewhat thanks to the surrounding hills, though the city can feel stifling at the height of summer.

Winter, from December to February, is cool and damp rather than severe, with January the coolest month — average highs around 7°C and lows near 0°C, dipping below freezing on the coldest nights. Snow falls and can lie briefly, and the season is often grey and overcast; the sheltering mountains spare the city the harshest cold of the Caucasus interior.

Tbilisi receives around 500–550 mm of precipitation a year, spread through the year with a clear late-spring maximum — May is typically the wettest month, with thunderstorms — while winter is drier; the Likhi range shields the city from the very heavy rains of Georgia's Black Sea coast. Live rainfall, humidity, and pressure readings for the city are shown in the panels above.

Tbilisi's narrow, hill-ringed valley traps summer heat, making it noticeably hotter and more stifling than the surrounding countryside, while sheltering it from both the drenching rains of Georgia's Black Sea coast and the fiercest cold of the high Caucasus. The city's famous sulphur springs are a reminder of the geothermal activity beneath its enclosed valley setting.

To follow any single measurement in Tbilisi more closely, use our live instruments: the online barometer for atmospheric pressure, the thermometer for temperature, the hygrometer for humidity, the anemometer for wind speed, the wind vane for wind direction, and the rain gauge for rainfall.