Climate averages 1991–2020
Tbilisi weather
in September.
A warm, moderately wet month: the 4th warmest and the 7th driest of the year. Meets the pleasant-weather rule
Long-term climate patterns, not a forecast for a particular trip.
September is a warm month in Tbilisi: daytime highs average 24.6°C and nights cool to about 14.7°C. By daytime temperature it is the 4th warmest of the 12 months.
Expect about 51 mm of rain on roughly 8 days, which makes September a moderately wet month (the 7th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 31 min on an average September day.
The nearest other city in this atlas is Rustavi (19 km away). In September its highs average 26.0°C, 1.3°C warmer than Tbilisi, with 21 mm of rain.
Among the 4 cities listed in Georgia, Tbilisi ranks 3rd of 4 for the warmest September highs and 2nd of 4 for the driest September (rainfall, lowest first). The mean September high of those 4 cities is 25.0°C; Tbilisi is 0.3°C cooler than that mean.
From September to October, average highs fall by 6.1°C to 18.6°C, and monthly rainfall rises from 51 mm to 65 mm.
The annual picture
September in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Tbilisi climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 5.6°C-3.8°C | -3.8°C | 25 | 6.4 | 9.510 h |
| February | 6.9°C-3.2°C | -3.2°C | 30 | 6.8 | 10.611 h |
| March | 11.4°C0.8°C | 0.8°C | 64 | 11.3 | 11.912 h |
| April | 16.7°C5.9°C | 5.9°C | 105 | 14.3 | 13.313 h |
| May | 21.5°C11.0°C | 11.0°C | 111 | 15.8 | 14.515 h |
| June | 26.3°C15.2°C | 15.2°C | 75 | 11.2 | 15.115 h |
| July | 29.6°C18.8°C | 18.8°C | 47 | 7.6 | 14.915 h |
| August | 29.9°C19.0°C | 19.0°C | 46 | 7.3 | 13.914 h |
| September, selected | 24.6°C14.7°C | 14.7°C | 51 | 8.0 | 12.513 h |
| October | 18.6°C8.9°C | 8.9°C | 65 | 9.1 | 11.111 h |
| November | 11.6°C2.0°C | 2.0°C | 43 | 7.1 | 9.910 h |
| December | 6.7°C-2.5°C | -2.5°C | 29 | 6.2 | 9.29 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
September in nearby cities
- Rustavi in SeptemberGeorgia · 19 kmHigh 26.0°C · Low 15.7°C · 21 mm rain
- Vanadzor in SeptemberArmenia · 102 kmHigh 19.3°C · Low 10.2°C · 73 mm rain
- Gyumri in SeptemberArmenia · 130 kmHigh 20.9°C · Low 8.4°C · 28 mm rain
- Vladikavkaz in SeptemberRussia · 151 kmHigh 19.8°C · Low 11.3°C · 98 mm rain
- Ganja in SeptemberAzerbaijan · 170 kmHigh 23.6°C · Low 15.1°C · 44 mm rain
- Yerevan in SeptemberArmenia · 170 kmHigh 25.4°C · Low 12.8°C · 8.4 mm rain
- Nazran in SeptemberRussia · 171 kmHigh 21.0°C · Low 12.6°C · 62 mm rain
- Sunzha in SeptemberRussia · 182 kmHigh 22.2°C · Low 13.6°C · 67 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Tbilisi) is explained once on the Tbilisi year overview and on the Sources, method and limits page.