Last updated: February 24, 2025
September in Atlanta brings a blend of warm temperatures and occasional rain, making it a unique month for residents and visitors alike. The maximum temperature can reach an impressive 36°C (97°F), while the average comfortably hovers around 24°C (75°F), providing inviting conditions for outdoor activities. However, as the month progresses, temperatures can dip to a minimum of 10°C (50°F), reminding us that fall is just around the corner. With 112 mm (4.4 in) of precipitation spread over 8 days, September experiences a good amount of humidity at 82%, contributing to the lush greenery that defines this vibrant city. Whether you're exploring local parks or enjoying the nightlife, Atlanta's September weather promises an engaging experience for everyone.
In September, Atlanta experiences a delightful transition with temperatures that reflect the lingering warmth of summer. The month starts with minimums around 10°C (50°F) and peaks at an impressive 36°C (97°F), showcasing a notable warmth that wraps the city in a cozy embrace. With an average temperature of 24°C (75°F), it’s an ideal time for outdoor activities, as the oppressive heat of July and August gives way to slightly cooler evenings. This month serves as a reminder of summer's final flourish before fall approaches, making it a vibrant time to enjoy all that Atlanta has to offer.
In September, Atlanta experiences a gentle transition in weather, marked by an average precipitation of 112 mm (4.4 in). This month typically sees rain on just 8 days, making it one of the drier periods in the late summer, following a wetter August with 15 rainy days. The rainfall, while consistent, reflects a trend towards drier days as the city edges closer to autumn. Compared to the heavier July and August, September's precipitation showcases a slight reduction, offering a refreshing balance as temperatures begin to cool slightly. With clear skies often interspersed with refreshing showers, September in Atlanta presents a perfect blend for outdoor activities, inviting residents to embrace the subtle shifts of the season.
As summer transitions into fall, September marks a slight dip in humidity in Atlanta, with levels averaging around 82%. This gradual decrease follows the typically more oppressive summer months, refreshing the air after the peak highs of July and August, which hovered around 83% and 81% respectively. The trend shows that while humidity remains relatively high throughout the year, the shift from the sticky summer to the cooler fall begins in September, setting the stage for October's even lower average of 78%. As the year progresses, humidity peaks again in the late fall and early winter months, hinting at the cyclical nature of Atlanta's climate.
As summer begins to wane, September in Atlanta sees a slight decline in the UV Index, registering at 9, indicating a very high exposure category and a burn time of just 15 minutes. This remains consistent with the trend of elevated UV levels throughout the summer months, where the index peaked at 11 from April through August. The gradual descent from the extreme ratings underscores the importance of continued sun protection, as even in September, the risk of overexposure persists. As the temperatures cool and the days shorten, it’s vital for residents and visitors alike to remain vigilant about UV safety. For more detailed insights, explore the comprehensive data on the Atlanta UV Index.
UV Risk Categories
As September rolls into Atlanta, the city basks in a glorious 297 hours of sunshine, marking a delightful transition from the sweltering summer months. This month captures the essence of late summer, offering slightly less sunshine than the peak July (339 hours) but still outshining the earlier part of the year. The steady accumulation of sunlight from January's modest 169 hours to September’s robust total is mirrored in the enchanting vibrancy of the city during these months. Residents and visitors alike can relish the mild temperatures and abundant sunshine before the sun dips further in October, where the anticipated 270 hours beckon a cozy arrival of fall. As the days grow shorter, September serves as a beautiful bridge, inviting all to savor the warmth and light of summer's farewell.
In September, Atlanta experiences a 44% chance of sunny weather, marking a pleasant shift as summer transitions into fall. This slight uptick from the prior months, where sunny probabilities hover in the low to mid-30s, signals an inviting change for outdoor activities. While the chances of sunshine are better in subsequent months—most notably November at 65%—September provides a balanced blend of warm days and cooler evenings, making it an ideal time to enjoy the city's parks and festivals. Overall, this month stands out as a promising opportunity for residents and visitors to bask in the sunshine before the cooler temperatures set in.
As September unfolds in Atlanta, the sunlight begins to wane, offering 12 hours of daylight—a gentle transition from the summer's long days. This month marks a notable decrease from the peak of 14 hours in June and July, reflecting the gradual shift toward autumn. The trend illustrates a steady reduction in daylight as the year progresses, starting from 10 hours in January and tapering down to just 9 hours by December. Although September retains more light than the winter months ahead, it serves as a reminder of the changing seasons, with vibrant autumnal hues waiting just around the corner.
As September ushers in the transition from summer to fall in Atlanta, the average wind speed gently rises to 2.3 m/s (5 mph). This slight increase from the languid breezes of August mirrors the shift in seasons, bringing a refreshing hint of change while remaining relatively calm compared to the spring months, where winds peaked at 3.6 m/s (8 mph). The warm summer months of July and August, characterized by their sultry stillness with average speeds of 2.0 m/s (4 mph) and 2.1 m/s (5 mph) respectively, give way to a breath of crisp air as autumn approaches. Overall, September's winds maintain a mild demeanor, setting the stage for the brisker breezes that October and November will deliver, making it a perfect time for outdoor activities amidst the subtle shift in nature.
The weather in Atlanta changes throughout the year, offering a unique experience in each season. Below is a month-by-month comparison of September's weather with other months, highlighting differences in temperature, precipitation, and other key factors. Click on each section to discover seasonal trends in Atlanta and find detailed weather information for every month.
September and January present contrasting weather patterns. In September, temperatures range from a mild 10°C (50°F) at night to a scorching 36°C (97°F) during the day, with an average of 24°C (75°F). The month sees significant precipitation, totaling 112 mm (4.4 in) over about 8 days, with a humidity level of 82%. In stark contrast, January experiences much colder conditions, with temperatures dipping as low as -11°C (12°F) at night and peaking at 25°C (77°F), averaging around 7°C (46°F). This month has slightly less precipitation at 106 mm (4.2 in) over 9 days, along with a higher humidity of 86%. For more specific details about January weather, you can check Atlanta weather in January.
In September, the weather tends to be warm and humid, with temperatures ranging from a cool 10°C (50°F) at night to a high of 36°C (97°F) during the day, averaging around 24°C (75°F). This month experiences about 112 mm (4.4 in) of precipitation over approximately 8 rainy days, maintaining a humidity level of 82%. In contrast, February sees much cooler temperatures, with a minimum of -5°C (22°F) and a maximum of 26°C (80°F), averaging 11°C (51°F). It is wetter, with 145 mm (5.7 in) of precipitation over approximately 13 days, and slightly higher humidity at 84%. For more detailed information about February weather, you can check Atlanta weather in February.
September and March present contrasting weather patterns. In September, temperatures range from a mild 10°C (50°F) at night to a warm maximum of 36°C (97°F) during the day, averaging around 24°C (75°F). Although it is relatively warm, the month experiences a significant amount of precipitation, with 112 mm (4.4 in) falling over about 8 days and a high humidity level of 82%. Conversely, March is much cooler, with temperatures dipping as low as -5°C (23°F) and averaging 13°C (56°F), peaking at 29°C (85°F). The month sees slightly more rainfall at 130 mm (5.1 in) over 13 days and similar humidity levels at 83%. For more detailed information, you can explore Atlanta weather in March.
When comparing the weather between September and April, September typically experiences warmer temperatures, with average highs reaching 36°C (97°F) compared to April's maximum of 29°C (85°F). In September, the temperature can range from a minimum of 10°C (50°F) to an average of 24°C (75°F), while April sees a cooler range with a minimum of 0°C (31°F) and an average of 17°C (62°F). Precipitation is relatively similar, with September receiving 112 mm (4.4 in) over about 8 days and April seeing slightly higher precipitation at 124 mm (4.9 in) over 9 days. Interestingly, both months boast high humidity levels, with September at 82% and April at 81%. For more detailed insights, explore Atlanta weather in April.
September typically presents warmer weather compared to May, with average temperatures peaking at 24°C (75°F) and reaching a maximum of 36°C (97°F), while May has a slightly cooler average of 22°C (71°F) and a maximum of 35°C (95°F). Both months experience notable humidity, with September at 82% and May slightly lower at 81%. Precipitation levels are also similar, with September recording 112 mm (4.4 in) over 8 days, compared to May's 96 mm (3.8 in) over 10 days. For more details, check out Atlanta weather in May.
September and June present a transition in weather patterns, with both months featuring warm temperatures and notable humidity. In September, temperatures range from a minimum of 10°C (50°F) to a maximum of 36°C (97°F), averaging around 24°C (75°F), while June sees slightly higher minimum and average temperatures, with a low of 12°C (54°F) and an average of 25°C (76°F). Precipitation levels are similar, with September receiving 112 mm (4.4 in) over about 8 days, compared to June's 121 mm (4.8 in) spread over 16 days. The humidity remains high in both months, at 82% in September and 81% in June, making the air feel quite warm and muggy. For a more in-depth look at June weather, you can check out Atlanta weather in June.
In comparing the weather of September and July, notable differences emerge. September experiences a wider temperature range, with minimums dropping to 10°C (50°F) and maximums rising to 36°C (97°F), averaging around 24°C (75°F). In contrast, July is generally warmer, with minimum temperatures at 16°C (61°F) and an average of 26°C (80°F), peaking at 35°C (95°F). Both months receive the same amount of precipitation, totaling 112 mm (4.4 in), but July sees rainfall on 18 days compared to September’s 8 days, leading to a slightly higher humidity level of 83% in July versus 82% in September. For a deeper dive into July's conditions, check out Atlanta weather in July.
In comparing the weather between September and August, we can observe some notable differences. September experiences a wider temperature range, with a minimum of 10°C (50°F) and a maximum of 36°C (97°F), while August has a milder minimum of 16°C (61°F) and a slightly lower maximum of 35°C (96°F). Humidity levels remain fairly consistent, with September at 82% and August at 81%. However, September is marked by higher precipitation, totaling 112 mm (4.4 in) over 8 days compared to August's 142 mm (5.6 in) over 15 days. For a closer look at the specifics of August weather, you can visit Atlanta weather in August.
In September, temperatures in the region range from a minimum of 10°C (50°F) to a maximum of 36°C (97°F), with an average temperature of 24°C (75°F). The month experiences considerable humidity at 82% and averages about 112 mm (4.4 in) of precipitation over 8 days. In contrast, October brings cooler temperatures, starting from a minimum of 0°C (32°F) and averaging 19°C (66°F), peaking at a maximum of 37°C (98°F). Rainfall increases slightly to 123 mm (4.9 in) while maintaining the same 8 rainy days but shows a marginally lower humidity at 78%. This seasonal transition highlights a shift towards cooler conditions and slightly increased rainfall. For more detailed information, check out Atlanta weather in October.
September and November present contrasting weather patterns. September boasts warmer temperatures, with an average of 24°C (75°F) and highs reaching up to 36°C (97°F), while November experiences much cooler conditions, averaging just 11°C (52°F) and a maximum of 26°C (79°F). Precipitation is slightly higher in September at 112 mm (4.4 in), compared to 82 mm (3.2 in) in November, though both months feature rain on about 8 days. Additionally, humidity remains high in both months, with September at 82% and November slightly higher at 86%. For a more detailed look at November weather in Atlanta, visit Atlanta weather in November.
September weather is characterized by warm temperatures, with averages around 24°C (75°F) and maximums reaching as high as 36°C (97°F). The month experiences considerable humidity at 82% and receives about 112 mm (4.4 in) of precipitation over approximately 8 days. In contrast, December brings a notable drop in temperature, with averages falling to 9°C (48°F) and minimums plunging to -6°C (22°F). While December is slightly wetter, with 138 mm (5.4 in) of rain over 11 days, the humidity also rises to 89%. For more details on December weather in Atlanta, you can visit Atlanta weather in December.
As summer transitions into fall, September in Atlanta brings a notable shift in weather patterns. With an average temperature settling around a comfortable 24°C (75°F), the days remain warm but are considerably more pleasant than the sweltering heat of earlier months. Humidity levels peak at 82%, contributing to a slightly sticky atmosphere, although it's a welcome respite from the intense summer heat. Rainfall is not uncommon, with about 112 mm (4.4 in) over about eight days, making September a month of refreshing showers that nourish the vibrant greenery. This month serves as a bridge to the cooler seasons ahead, offering a unique blend of warmth and humidity that distinguishes it from both the sweltering summer and the crisp fall. For a deeper dive into what to expect throughout the year, check out Atlanta Climate.