Last updated: August 21, 2025
In September, Tbilisi, Georgia, experiences a delightful transition as summer begins to wane. The maximum temperature can soar to 32°C (91°F), while the average hovers around a comfortable 18°C (65°F). However, the nights can cool down significantly, dipping to a crisp 3°C (38°F). Rainfall is not uncommon, with 37 mm (1.5 in) expected over seven days, contributing to a humidity level of 67% that adds a refreshing touch to the air. This blend of warm days and cooler evenings makes September an ideal time for both exploration and relaxation in the charming capital of Georgia.
In September, Tbilisi begins to transition from the sultry heights of summer to a more temperate climate, offering a pleasant respite for visitors. The temperatures range from a comfortable 3°C (38°F) at night to a warm 32°C (91°F) during the day, with an average of 18°C (65°F). This month marks a significant drop from the peak temperatures of summer, inviting outdoor exploration and vibrant city life amidst the stunning fall landscapes. As the heat recedes, the charm of Tbilisi shines through, making September an ideal time to experience its rich culture and breathtaking views.
In September, Tbilisi experiences a gentle transition as summer gives way to autumn, characterized by an average precipitation of 37 mm (1.5 in) over 7 days. This is a slight increase compared to the drier late summer months, with August recording only 29 mm (1.1 in). As the city prepares for cooler weather, September's rainfall helps nourish the landscape, making it vibrant and lush. The trend of gradually rising precipitation from the parched summer peaks in September before continuing into the wetter months of October and November, which both see substantial increases in rainfall, further indicating the seasonal shift. This blend of mild weather and refreshing rain makes September a particularly pleasant time to enjoy Tbilisi's outdoor charm.
As the summer heat begins to wane in Tbilisi, September ushers in a noticeable shift in humidity, dropping to 67%. This decline from the sweltering August levels of 66% marks the beginning of a transition towards a more comfortable climate. Following a consistent trend of decreasing humidity from May's 78% down to early autumn, September presents a refreshing reprieve, inviting both locals and visitors to enjoy the city's vibrant atmosphere. However, the respite is short-lived, as the humidity begins to creep back up in October, reaching 81%. This ebb and flow of humidity throughout the year not only defines Tbilisi’s climate but also shapes the city's unique ambiance as seasons change.
In September, Tbilisi, Georgia experiences a UV Index of 8, categorized as very high, which signifies that outdoor enthusiasts should take precautionary measures during sun exposure. As summer transitions to autumn, this month marks a slight decrease from the peak of July and August, where the UV Index reached 10 and 9 respectively. Despite this drop, the burn time remains a brisk 15 minutes, making it crucial for residents and visitors alike to stay vigilant against potential skin damage. The trend across these months reflects a consistent need for sun protection as UV levels remain elevated; thus, individuals should ensure they’re well-prepared. Stay informed about the UV Index by checking Tbilisi UV Index for safety tips and guidelines.
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As summer draws to a close, September embraces Tbilisi with warm sunshine, offering a delightful 323 hours of radiant daylight. This month marks a gentle transition from the peak of summer, which boasts an impressive 412 hours in July, to the mellow tones of autumn. Interestingly, while September experiences a slight dip in sunshine compared to the blazing months of July and August, it still comfortably surpasses the hours recorded at the year's start. This seasonal ebb and flow not only indicates a lingering warmth in the air but also sets the stage for autumn’s gradual arrival, ensuring that Tbilisi remains a sunlit gem even as the days start to grow shorter. With vibrant days ahead, the city invites exploration and enjoyment under its September skies.
As summer transitions into autumn, **September in Tbilisi, Georgia, boasts a promising 54% chance of sunny weather, making it one of the more favorable months for sunshine. This slight dip from the peak sunny days in August (67%) still maintains a vibrant atmosphere, perfect for exploring the city’s rich culture and beautiful landscapes. Notably, September holds a higher likelihood of sunshine than both the earlier months of spring and the cooler October, highlighting a trend where late summer and early autumn continue to offer enjoyable weather. Residents and visitors alike can relish in the warmth as the city prepares for its colorful fall.
As summer transitions into autumn, September in Tbilisi, Georgia, offers a delightful balance with approximately 12 hours of daylight. This month marks a gentle decline from the sun-drenched days of summer, where June peaked at 15 hours, gradually tapering off as the daylight hours shrink leading into October's 11 hours. The shift from the vibrant 14 hours of May to the more moderate September light signals a change in the season, inviting residents and visitors alike to embrace the softer warmth and rich hues of early fall. With daylight diminishing from this point forward, the city prepares for a cozy embrace of shorter days ahead.
As September approaches in Tbilisi, Georgia, the gentle breeze begins to gather strength, averaging 2.2 m/s (5 mph). This seasonal shift marks a subtle transition from the calmer summer winds, which have averaged around 1.8 m/s (4 mph) during August. This uptick in wind speed signals the arrival of autumn's first whispers, creating a refreshing atmosphere that invites both locals and visitors to enjoy the city's charming outdoor spaces. Interestingly, September stands out by maintaining a momentum similar to that of the spring months, where winds typically hover around 2.4 m/s (5 mph). Overall, the September winds encapsulate a blend of warmth and freshness, embodying the essence of a city poised on the cusp of change.
Weather in Tbilisi varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Tbilisi, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January in Tbilisi offer contrasting weather experiences. September boasts milder temperatures with a minimum of 3°C (38°F) and an average of 18°C (65°F), peaking at a warm 32°C (91°F). This month also sees some rain, with about 37 mm (1.5 in) of precipitation over 7 days, coupled with a comfortable humidity level of 67%. In stark contrast, January is characterized by much colder conditions, where temperatures drop to a minimum of -8°C (17°F), with an average of just 1°C (33°F) and a maximum reaching only 12°C (54°F). The precipitation in January is lighter at 21 mm (0.8 in) over 5 days, but the humidity is notably higher at 87%. For more details on Tbilisi's January weather, you can visit Tbilisi weather in January.
In September, the weather is significantly warmer and more variable, with temperatures ranging from a chilly 3°C (38°F) at night to a sunny 32°C (91°F) during the day. This month sees an average temperature of 18°C (65°F) and experiences approximately 37 mm (1.5 in) of precipitation over about 7 days, coupled with a moderate humidity level of 67%. In contrast, February presents a much colder climate, characterized by minimum temperatures dropping to -12°C (11°F) and a maximum of only 16°C (61°F). The average temperature sits around 2°C (36°F), and while it has slightly less precipitation at 26 mm (1.0 in), the humidity is notably higher at 88%. For more details on February weather in Tbilisi, you can visit Tbilisi weather in February.
September and March exhibit distinct weather patterns, reflecting the transition between summer and winter. In September, temperatures range from a mild 3°C (38°F) at night to a warm 32°C (91°F) during the day, with an average of 18°C (65°F). This month experiences relatively low precipitation of 37 mm (1.5 in) over about 7 days, with a humidity level of 67%. In contrast, March sees much colder temperatures, with nighttime lows dropping to -11°C (12°F) and daytime highs reaching up to 21°C (70°F), averaging around 5°C (40°F). This month is wetter, experiencing 75 mm (2.9 in) of precipitation over 15 days and higher humidity at 85%. For more specific details, you can check Tbilisi weather in March.
When comparing the weather in September and April, distinct differences emerge. September typically enjoys a much warmer climate with average temperatures ranging from a minimum of 3°C (38°F) to a maximum of 32°C (91°F), while April is cooler, with temperatures ranging from -3°C (28°F) to a maximum of 24°C (76°F). Additionally, September sees a lower total precipitation of 37 mm (1.5 in) over about 7 days, contrasting sharply with April's higher rainfall of 98 mm (3.8 in) across approximately 14 days. The humidity level is also noticeably higher in April at 80% compared to September's 67%. For more details on the April weather specifics, you can refer to Tbilisi weather in April.
September generally showcases warmer temperatures compared to May, with minimums around 3°C (38°F) and a maximum reaching up to 32°C (91°F). In contrast, May can start with cooler nights, hitting lows of -5°C (24°F), though the daytime average is slightly lower at 15°C (59°F) with a peak of 29°C (84°F). Precipitation levels are also notably different; September experiences about 37 mm (1.5 in) over 7 days, while May sees significantly higher rainfall at 116 mm (4.6 in) spread across 15 days. The humidity is higher in May at 78%, compared to September's 67%, contributing to a distinctly different feel in the atmosphere. For more detailed insights about the weather during this month, check out Tbilisi weather in May.
When comparing the weather in September and June, notable differences emerge in temperature and humidity. September enjoys a broader temperature range, with minimums as cool as 3°C (38°F) and maximums soaring to 32°C (91°F), while the average temperature is a pleasant 18°C (65°F). In contrast, June features warmer temperatures, with minimums starting at 8°C (46°F) and maximums reaching 34°C (94°F), averaging around 20°C (69°F). Additionally, June experiences slightly higher humidity at 79% compared to September's 67%. Both months have similar precipitation levels, with June seeing 47 mm (1.8 in) over 8 days and September recording 37 mm (1.5 in) over 7 days. For more detailed insights, check out Tbilisi weather in June.
When comparing the weather in September and July, we see distinct differences in temperature and humidity. September features a more moderate temperature range, with a minimum of 3°C (38°F) and an average of 18°C (65°F), peaking at 32°C (91°F). In contrast, July is noticeably warmer, with temperatures ranging from a minimum of 10°C (51°F) to an average of 23°C (74°F), and highs reaching 36°C (97°F). Additionally, July experiences higher humidity at 80%, compared to September's 67%. Precipitation is also higher in July, totaling 50 mm (2.0 in) over 6 days, versus September's 37 mm (1.5 in) over 7 days. For more detailed information, you can check Tbilisi weather in July.
In comparison to August, September experiences a noticeable drop in temperature, with average highs of 32°C (91°F) compared to August’s peak of 36°C (97°F). The minimum temperatures in September are also cooler, starting at 3°C (38°F), while August’s lows are considerably warmer at 11°C (53°F). September does see slightly more precipitation, with 37 mm (1.5 in) over 7 days, compared to August’s 29 mm (1.1 in) over 5 days. Humidity levels remain relatively similar, with September at 67% and August at 66%. For more specific details about August weather, you can check Tbilisi weather in August.
September tends to be warmer and more pleasant, with temperatures ranging from a minimum of 3°C (38°F) to a maximum of 32°C (91°F) and an average of 18°C (65°F). It experiences relatively low precipitation at 37 mm (1.5 in) over about 7 days, along with a humidity level of 67%. In contrast, October ushers in cooler temperatures, with a minimum reaching -3°C (27°F) and an average of 12°C (53°F), peaking at 26°C (80°F). Rainfall increases to 60 mm (2.4 in), also spread over 7 days, and humidity rises to 81%. This shift marks a significant transition in the weather pattern as the fall season progresses. For more details on October weather in Tbilisi, check out Tbilisi weather in October.
September and November present a striking contrast in weather characteristics. In September, temperatures range from a mild minimum of 3°C (38°F) and can soar up to a maximum of 32°C (91°F), with an average of 18°C (65°F). The month sees relatively low precipitation at 37 mm (1.5 in) over about 7 days, accompanied by a moderate humidity of 67%. In contrast, November experiences a drop in temperatures, with a minimum of -6°C (21°F) and a cooler average of 5°C (42°F), though the maximum temperature can still reach 22°C (73°F). Rainfall increases to 52 mm (2.0 in) over approximately 8 days, and humidity rises significantly to 84%. These shifts highlight the transition from the warm, dry conditions of late summer to the cooler, wetter climate of late autumn. For more details, check out Tbilisi weather in November.
September and December present contrasting weather conditions. In September, temperatures range from a cool 3°C (38°F) at night to a warm 32°C (91°F) during the day, with an average of 18°C (65°F). Humidity is moderate at 67%, and the month sees approximately 37 mm (1.5 in) of precipitation over about seven days. In stark contrast, December experiences much colder temperatures, with a minimum of -9°C (16°F) and a maximum of 14°C (57°F), resulting in an average temperature of just 2°C (36°F). The humidity rises significantly to 85%, and while precipitation remains similar at 37 mm (1.4 in) spread across seven days, the overall atmosphere is much more frigid. For more details on December weather in Tbilisi, visit Tbilisi weather in December.
As September unfolds in Tbilisi, the transition from the long, hot summer to the cooling embrace of autumn becomes evident. With maximum temperatures reaching around 32°C (91°F), the early part of the month still clings to the warmth of summer, yet the average temperature cools to a comfortable 18°C (65°F). Unlike the sweltering July and August, September sees increased humidity levels at 67%, alongside a modest precipitation total of 37 mm (1.5 in) over about seven days, spicing up the air with refreshing rain. This month serves as a gentle reminder of autumn's approach, making it a delightful time for explorations. For more insights, discover the broader trends of Tbilisi’s unique weather patterns at Tbilisi Climate.