Tbilisi · Month comparison

August vs September

September ranks #1 overall vs August at #12. The grape harvest arrives — Rtveli season makes September the most culturally charged month in the Georgian year.

Tbilisi August — traditional wooden balconied house facade in the old quarter in summer

August

#12 of 12 months

Worth considering

Still peak summer — same heat as July, still dry, but the autumn sweet spot is close.

  • ↑Consistently dry weather: just 35mm across the month and 8.9 sunshine hours daily; August is dependably fine with virtually no rain to disrupt plans
  • ↑Late August signals the beginning of Rtveli preparations — the grape harvest in Kakheti starts in some vineyards by late August and the entire city feels the approaching wine season
Tbilisi September — panoramic view of the city from the hills as autumn begins and the grape harvest season opens

September

#1 of 12 months

Best match

The grape harvest arrives — Rtveli season makes September the most culturally charged month in the Georgian year.

  • ↑Rtveli (grape harvest) begins in Kakheti from mid-September; vineyard visits and harvest participation are available throughout the month — this is the most important event in Georgian agricultural and cultural life, 8,000 years in practice
  • ↑Weather perfects itself: 26°C with 7.6 sunshine hours and minimal rainfall; everything the city offers is available without the July and August heat making outdoor activity uncomfortable
FactorAugustSeptember
Weather score
6
10
Value score
4
6
Crowd score
4
6
Events score
4
9
Atmosphere
6
10
Avg high temp31°C26°C
Monthly rain35mm42mm
Daily sunshine8.9hrs7.6hrs

August trade-offs

  • ↓Temperature matches July's 31°C peak — the same heat management challenges apply; those sensitive to heat should wait until September
  • ↓August is when the European tourist season and the Georgian summer holiday overlap; the combination produces the most crowded version of the city
  • ↓Accommodation prices remain at or near peak; budget-conscious visitors should note that August and July are the two most expensive months in Tbilisi's calendar

September trade-offs

  • ↓Kakheti gets crowded during Rtveli and accommodation in the wine region must be booked well ahead for harvest weekends — day-tripping from Tbilisi is the pragmatic approach
  • ↓September remains a popular travel month; visitor numbers are still moderately high, particularly around the harvest festival weekends
  • ↓Nights become noticeably cooler from mid-September, requiring a layer for evening terrace dining
See all 12 months for Tbilisi →August in detail →September in detail →
Scores compare months within Tbilisi. Climate data: Open Meteo ERA5 30-year normals (1991–2020). Methodology →