Tbilisi Weather in September
Tbilisi weather in September is summer with the edge taken off. Highs slip to about 27 °C (81 °F), a five-degree drop from August, nights ease to around 16 °C (61 °F), and rain stays low at roughly 35 mm on five days. Skies remain mostly clear. The evenings draw in, though, with sunset around 19:13. October cools by another six or seven degrees, and the two months together form the city's most comfortable season.
What to wear in Tbilisi in September
Short sleeves still work in the afternoon, but carry a light sweater or denim jacket for the evening. Closed shoes are useful if you plan to tread grapes or walk vineyard rows in Kakheti. A sun hat stays sensible through mid-month, and a small umbrella covers the rare shower.
What September is good for
The harvest pulls everyone east. Rtveli, the grape harvest in Kakheti, usually opens in early or mid-September, when Telavi averages about 26 °C with nights near 15 °C, ideal for vineyard days. The Tsinandali Festival brings classical concerts to the Tsinandali Estate early in the month, and Alaverdoba gathers pilgrims at Alaverdi Monastery around 28 September. Kazbegi, at about 18 °C, is drier than in midsummer and good for hiking.
Day trips from Tbilisi in September
| Place | High °C | Low °C | Rain days |
|---|---|---|---|
| Mtskheta | 26° | 15° | 6 |
| Kazbegi (Stepantsminda) | 18° | 8° | 8 |
| Gudauri | 15° | 4° | 13 |
| Sighnaghi | 25° | 14° | 7 |
| Telavi | 26° | 15° | 7 |
| Borjomi | 24° | 11° | 7 |
| Kojori | 21° | 9° | 7 |
Tbilisi in September: FAQ
Can you still wear summer clothes in Tbilisi in September?
Mostly, yes. The weather in Tbilisi in September means afternoons of roughly 27 °C (81 °F); the first half still feels like summer, though late-month evenings call for a light jacket. With only about five rainy days, it is one of the most comfortable months for walking the city.
When does the grape harvest start in Kakheti?
Picking usually starts in the first half of September and carries on into October; the authorities and wineries announce the start each year. Telavi and Sighnaghi then average around 25 °C (77 °F) by day. Ask a family winery or your guide about picking days in advance, as dates depend on the grapes.
The monthly figures come from the Tbilisi weather station records described in the guide on this page. Cloud cover: CHELSA 1981–2010. Daylight and sunrise are for the 15th of each month (Georgia keeps UTC+4 all year). A rain day has at least 1 mm.
Tbilisi weather in other months
Tbilisi in September
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