Tbilisi weather in September

In September, Tbilisi sees average daytime highs of 23°C and overnight lows near 12°C, with 51 mm of rain across 8 wet days and about 12.3 hours of daylight. It is the 4th-warmest and 6th-wettest month of the year here.

Highs ease over the month, from about 25°C in the first days to 20°C by the end. The sky is clear or mostly clear about 47% of the time in September, and the air most often feels dry.

Daylight stretches from about 13 hours at the start of September to 11 h 36 min by month's end. Set against the rest of the year, September is Tbilisi's 3rd-clearest and 8th-windiest month. For the whole year in context, see Tbilisi's year-round climate.

Daytime high
23°
4th warmest
Overnight low
12°
9th coldest
Rainfall
51 mm
8 wet days
Daylight
12 h 18 min
6:47 AM – 7:03 PM
Cloud cover
45%
3rd clearest
Wind
7 km/h
8th windiest
Solar energy
4.14 kWh/m²
Travel score
7.2
out of 10

Tbilisi is capital and the largest city of Georgia (country).

Air quality
Elevated
PM2.5 20 µg/m³ · 2017
Density
1,458/km²
people per km²
Founded
~455 CE

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 25°C in the first days to 20°C by the end.

A typical September day in Tbilisi reaches about 23°C in the afternoon and slips back to 12°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 17°C and 28°C. Set against its neighbours, September runs about 5°C cooler than August and about 6°C warmer than October.

10°20°30°151015202530
Avg high (°C)Avg low (°C)
12615
22615
32515
42514
52514
62514
72514
82414
92414
102413
112413
122413
132313
142313
152313
162312
172312
182212
192212
202212
212212
222211
232111
242111
252111
262111
272011
282010
292010
302010

How September really feels in Tbilisi

Once humidity and wind are folded in, September averages 0 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C
0
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

September sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Tbilisi weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 6th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -5°256.45.69.30.0
Feb / -4°306.75.710.30.1
Mar / -0°6411.34.311.71.7
Apr15° / 10514.31.113.13.8
May19° / 10°11215.8014.35.3
Jun24° / 14°7511.20156.8
Jul27° / 17°477.6014.77.0
Aug28° / 17°467.3013.76.9
Sep23° / 12°518012.37.2
Oct17° / 669.10.110.95.5
Nov10° / 437.12.19.62.2
Dec / -3°296.24.190.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 47% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 19% of September, with mostly cloudy or overcast conditions the remaining 33%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
17426
27426
37327
47327
57426
67426
77327
87327
97228
107228
117228
127129
137030
146931
156931
166733
176634
186634
196436
206337
216238
226139
236139
246040
255941
265842
275743
285743
295644
305644

Chance of precipitation in September

Any precipitation

Tbilisi gets around 51 mm of rain over 8 wet days in September. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 27% and peaks near 30% on the wettest days.

0%10%20%30%40%151015202530
Rain chance (%)
126
225
325
425
525
625
725
825
925
1025
1125
1225
1325
1425
1525
1626
1726
1826
1927
2027
2128
2228
2328
2429
2529
2630
2730
2830
2930
3030

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

Most of September feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, September lands in the dry band about 75% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)
148458
250437
353416
455396
558375
661354
763334
866313
968293
1070282
1172262
1274251
1375241
1476231
1578220
1679210
1780200
1881190
1982180
2083170
2184160
2285150
2386140
2487130
2588120
2689110
2790100
289190
299280
309370

Wind in September

Winds average 7 km/h in September.

Across September, daily wind ranges from about 7 km/h on the calmest days to 7 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 13 hours at the start of September to 11 h 36 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 84 minutes over September. Sunrise moves from 6:31 AM to 7:02 AM, and sunset from 7:30 PM to 6:38 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.06:317:30
212.96:327:28
312.96:337:26
412.86:347:25
512.86:357:23
612.76:367:21
712.76:377:19
812.76:387:18
912.66:397:16
1012.66:407:14
1112.56:417:12
1212.56:427:10
1312.46:447:09
1412.46:457:07
1512.36:467:05
1612.36:477:03
1712.26:487:01
1812.26:497:00
1912.16:506:58
2012.16:516:56
2112.06:526:54
2212.06:536:52
2311.96:546:51
2411.96:556:49
2511.86:566:47
2611.86:576:45
2711.76:596:43
2811.77:006:42
2911.77:016:40
3011.67:026:38

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.14 kWh/m².

For context, solar energy here swings from a low near 1.87 kWh/m² to a high of 6.35 kWh/m² in June across the year — September's 4.14 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.8Bright
24.8Bright
34.7Bright
44.7Bright
54.6Bright
64.6Bright
74.5Bright
84.5Bright
94.4Bright
104.4Bright
114.3Bright
124.3Bright
134.3Bright
144.2Bright
154.2Bright
164.1Bright
174.1Bright
184.0Bright
194.0Moderate
203.9Moderate
213.9Moderate
223.9Moderate
233.8Moderate
243.8Moderate
253.7Moderate
263.7Moderate
273.6Moderate
283.6Moderate
293.6Moderate
303.5Moderate
Planning a trip in September

Hazard calendar for Tbilisi

In seasonPeak

In September, Tbilisi sits inside its rainy season season. The full year is below, with each hazard's peak months called out.

Tbilisi's rainy season runs March–June, when most of the year's rain falls.

Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is September a good time to visit Tbilisi?

Our two travel scores rate September for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

7.2
Sightseeing
1st-best month of the year
5.4
Beach & pool
4th-best month of the year

September is one of the better times to visit Tbilisi for general sightseeing.

What to pack for Tbilisi in September

From September's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In September, Tbilisi sees daytime highs around 23°C and nights near 12°C. Worth packing: light clothes and rain gear. About 8 days see rain.

light clothesrain gear

UV index in Tbilisi in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 6 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Tbilisi peaks around June 23 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near January 10 at about 2 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighModerateLowJun 23UV 9Jan 10UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar3Moderate
Apr6High
May8Very high
Jun9Very high
Jul9Very high
Aug9Very high
Sep6High
Oct4Moderate
Nov2Moderate
Dec2Low

Air quality in Tbilisi in September

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where September falls, not just the annual average.

Air quality in Tbilisi is worst in July — around 26 µg/m³ PM2.5 (moderate), about 2.1× the cleanest month (December, 13 µg/m³).

Seasonal pattern from CAMS reanalysis, scaled to Tbilisi's WHO annual average of 20 µg/m³.

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateJul 1526 µg/m³Dec 1213 µg/m³
PM2.5 (µg/m³)Level
Jan16Moderate
Feb18Moderate
Mar22Moderate
Apr23Moderate
May26Moderate
Jun25Moderate
Jul26Moderate
Aug24Moderate
Sep20Moderate
Oct15Moderate
Nov13Moderate
Dec13Moderate
Location & terrain

Where is Tbilisi?

Tbilisi sits at 41.7°N, 44.8°E, 433 m above sea level, in Georgia. The nearest listed city is Rustavi, 19 km away.

TelaviAlaverdiGoriGazakhTs’khinvaliIjevan

Topography around Tbilisi

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Tbilisi.

Within 3 km, the terrain around Tbilisi has significant variations in elevation — a maximum elevation change of 353 m around an average of 486 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 1,155 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,952 m.

The land around Tbilisi is covered by artificial surfaces (56%) and trees (23%) within 3 km, grassland (41%) and trees (24%) within 16 km, and trees (43%) and grassland (38%) within 80 km.

3 km
353 m
16 km
1,155 m
80 km
2,952 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Rustavi 19 km · Marneuli 23 km · Telavi 58 km · Alaverdi 67 km · Gori 68 km · Gazakh 80 km · Ts’khinvali 93 km · Ijevan 94 km

Georgia travel facts

Travel advisory
Level 1
Exercise Normal Precautions
Power plugs
Type C / F
220 V · 50 Hz
Prices
≈ 33% of US
price level, 2025
GDP per capita
$9,692
2025
Happiness
5.5 / 10
World Happiness, 2025
Safe drinking water
71%
of population, 2024
Homicide rate
2
per 100k, 2019
Road deaths
12.4
per 100k/yr, 2019
Income group
Upper middle
World Bank
English
Moderate
EF EPI 541
Religion
Eastern Orthodox Christian 83%Muslim 11%Armenian Apostolic Christian 3%other 1%

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Tbilisi (41.6914°, 44.8341°, elevation 433 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).