September Weather in Charlotte, United States

Last updated: February 24, 2025

In September, Charlotte experiences a delightful blend of warmth and occasional rain, making it an intriguing month for weather enthusiasts. With maximum temperatures soaring to 35°C (95°F) and an average of 23°C (75°F), the city's warmth is tempered by a refreshing mix of humidity at 75%. Those seeking a cooler escape will find solace in the minimum temperatures dipping to 8°C (46°F). Rain is not uncommon, with 9 days of precipitation accumulating to 133 mm (5.2 in), adding a splash of life to the vibrantly changing landscape. Whether basking in the sun or enjoying the cool breezes after rain, September in Charlotte offers a rich tapestry of weather experiences.

September Temperature in Charlotte

As summer fades into autumn, September in Charlotte offers a delightful transition with temperatures ranging from a mild 8°C (46°F) at night to a comfortable max of 35°C (95°F) during the day. This month boasts an average of 23°C (75°F), making it perfect for outdoor activities and enjoying the last warm days before fall sets in. Compared to the sweltering heat of July and August, September feels refreshingly moderate, signaling a gradual decline in peak temperatures. With warmer days still lingering, but cooler nights emerging, residents can relish in the best of both worlds—ideal for evening strolls or weekend getaways as the vibrant hues of autumn begin to take over the landscape.

September Weather in Charlotte: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Charlotte, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec434954627177817974655147
Data source: Temperature data for Charlotte generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Charlotte

In September, Charlotte experiences a noticeable increase in precipitation, with an average of 133 mm (5.2 in) of rainfall over 9 days. This marks a significant rise compared to the summer months, where July and August saw a combined average of 114 mm and 105 mm respectively, both spanning 15 days of rain. The late summer transition into fall often brings more intense weather patterns, contributing to this uptick in precipitation. Interestingly, as the city moves into October, the rainfall drops back to 92 mm (3.6 in), reflecting a shift towards drier conditions. This trend highlights September as a vital month in Charlotte's climate calendar, serving as a bridge between the hot, humid summer and the cooler, milder fall.

September Precipitation Trends in Charlotte

The chart displays monthly precipitation patterns in Charlotte, with values for each month alongside September's data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September's conditions compare to those of other months.
JanFebMarAprMayJunJulAugSepOctNovDec9211683103113821141051339290120
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

September Humidity in Charlotte

As summer transitions to fall, September in Charlotte experiences a noticeable dip in humidity, measuring around 75%. This marks a welcome relief compared to the oppressive highs of the summer months, particularly August, which boasts a humidity level of 74%. The trend reveals a gradual decrease in humidity from the peak of 86% in January down to the more comfortable levels of late summer and early fall. While September's humidity still lingers just above the lows of July and August, it sets the stage for the wetter months ahead, as humidity begins to rise again in October and November, reaching 87%. This ebb and flow exemplifies the shifting climate in Charlotte, where seasonal transitions bring both relief and anticipation of what’s to come.

September Average Humidity in Charlotte

This chart illustrates the average monthly humidity levels in Charlotte, with September's data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, allowing you to see how September's humidity levels compare to other months.
JanFebMarAprMayJunJulAugSepOctNovDec86%85%84%82%83%82%80%74%75%79%87%87%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Charlotte

As September arrives in Charlotte, the UV Index remains notably high at 9, reflecting a strong chance of sunburn for those unprotected, with a burn time of just 15 minutes. This marks a slight decrease from the extreme levels seen in June but stays firmly within the very high exposure category. Observing the trends, we see summer months like July and August maintain similar intensities, highlighting a peak in sun exposure from late spring through early fall. It's essential to stay vigilant about sun safety, as the sun's rays can be fierce during this time. For more insights and tips on how to protect yourself, check out the Charlotte UV Index.

Maximum UV Index Levels in Charlotte for September

The chart shows the monthly maximum UV Index (UVI) for Charlotte in September, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues.
JanFebMarAprMayJunJulAugSepOctNovDec46810101110109853
Data source: Charlotte September UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

September Sunshine in Charlotte

As September rolls into Charlotte, residents can bask in 287 hours of sunshine, marking a gentle transition from the sun-soaked summer months. Following the peak of July with an impressive 345 hours, September still offers a generous amount of sunny days, signifying a gradual decline as the city shifts toward autumn. The sunshine hours during this month comfortably outshine the early winter months, with January’s mere 162 hours feeling worlds away. This gradual ebb in sunlight reveals a pattern where spring and summer months consistently boast higher sunshine, while the fall and winter invite cooler weather and shorter days. Embracing these rays in September, Charlotteans can enjoy the tail end of summer before the days grow noticeably shorter.

Monthly Sunshine Duration in Charlotte: September Highlighted

The September sunshine duration represents the total number of hours Charlotte experiences direct sunlight during the month of September, excluding cloudy or obstructed periods. This chart compares the sunshine duration of September with the other months of the year.
JanFebMarAprMayJunJulAugSepOctNovDec162h175h245h277h299h317h345h312h287h264h227h200h
Data source: Charlotte September Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Charlotte During September

In September, Charlotte enjoys a 51% chance of sunny weather, marking a slight uptick from the summer months, where sunshine dips to around 28% to 43%. This transition into fall brings a more favorable outlook compared to the preceding months, signaling an opportunity for residents and visitors alike to bask in pleasant weather. Interestingly, this trend persists into October, where the likelihood of sunshine remains steady at 47%. As the season progresses, November shows a remarkable 62% chance of clear skies, suggesting that while summer may dwindle, the sun continues to shine brightly in the Carolinas as autumn unfolds.

Percentage of Sunny Days in September in Charlotte

The chart illustrates the percentage of sunny days in Charlotte throughout the year, with September highlighted. It highlights the variation in sunshine across each month and provides an overview of the typical frequency of sunny days, offering insights into how often Charlotte experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec47%37%38%57%38%28%43%43%51%47%62%44%
Data source: Charlotte September chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Charlotte in September

As September arrives in Charlotte, the city begins to transition from the long, sun-soaked days of summer to the crisper embrace of fall. The daylight duration this month averages around 12 hours, signaling a subtle shift from the peak summer sunlight. This gradual decline follows the summer months of June, July, and August, which each boast a generous 14 hours of daylight. In contrast, the length of daylight starts to taper off as October looms, with only 11 hours expected. What’s fascinating is how the daylight duration mirrors the seasonal changes, creating a rhythmic cycle that enhances the experience of each month, inviting Charlotteans to savor the last golden rays of late summer before embracing the vibrant hues of autumn.

Average Daylight Hours in Charlotte for September

The chart illustrates the variation in daylight duration in Charlotte throughout the year, with September highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec10h 4m10h 54m11h 59m13h 5m14h 1m14h 28m14h 13m13h 24m12h 20m11h 14m10h 17m9h 48m
Data source: Charlotte daylight hours, calculated by summing the hours between sunrise and sunset for each day.

September Winds in Charlotte

As September ushers in the early whispers of autumn in Charlotte, the average wind speed settles at 2.0 m/s (5 mph). This marks a slight dip from the summer months, where the winds were at their calmest, peaking in July and August with speeds of 2.1 m/s (5 mph) and 1.8 m/s (4 mph) respectively. Interestingly, the trend shows a gradual increase in wind velocity as the year progresses, with April boasting the year’s highest average of 3.1 m/s (7 mph). Overall, September's soft breezes create a comfortable transition, setting the stage for the blustery months ahead while signaling the end of summer's stillness.

Average September Wind Speed in Charlotte

The chart displays monthly wind speed patterns in Charlotte, with values for each month shown alongside September's data, which is highlighted for easy comparison. It illustrates the average wind speed, offering insights into how September's wind conditions compare to the rest of the year.
JanFebMarAprMayJunJulAugSepOctNovDec2.52.92.93.12.62.32.11.82.0 m/s2.42.62.9
Data source: Charlotte September wind data, generated using information from the Copernicus Climate Change Service.

How September Weather in Charlotte Compares to Other Months

The weather in Charlotte 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 Charlotte and find detailed weather information for every month.

In comparing the weather between September and January, it's clear that these two months present strikingly different climates. September typically sees warmer temperatures, with averages around 23°C (75°F) and highs reaching up to 35°C (95°F), while January brings much colder conditions, with average temperatures plummeting to 6°C (44°F) and minimums dropping to -12°C (10°F). Precipitation is slightly higher in September, with 133 mm (5.2 in) over 9 days, compared to January's 92 mm (3.6 in) also over 9 days. Notably, January experiences higher humidity at 86%, compared to September's 75%. For more detailed insights into the January climate, you can visit Charlotte weather in January.

In comparing the weather of September and February, notable differences emerge. September typically boasts warmer temperatures, with minimums around 8°C (46°F) and highs reaching up to 35°C (95°F), while February experiences a much chillier range, with minimums dipping as low as -7°C (20°F) and maximums peaking at 27°C (80°F). Precipitation is somewhat similar in both months; September sees about 133 mm (5.2 in) over 9 days, whereas February has slightly less at 116 mm (4.6 in) across 11 days. Additionally, February's humidity is higher at 85% compared to September's 75%, contributing to a more damp and cool atmosphere. For more specific details on February weather, visit Charlotte weather in February.

September and March exhibit distinctly different weather patterns. In September, temperatures range from a minimum of 8°C (46°F) to a maximum of 35°C (95°F), with an average of 23°C (75°F), while March experiences cooler temperatures that stretch from -6°C (22°F) to a maximum of 30°C (87°F), averaging around 12°C (54°F). Precipitation is more abundant in September, totaling 133 mm (5.2 in) over about 9 days, compared to March which sees 83 mm (3.3 in) spread over 10 days. Humidity levels are also notably higher in March at 84%, compared to 75% in September. For further details on March weather, you can visit Charlotte weather in March.

September and April present distinct weather experiences, reflecting the transition between summer and autumn, and the arrival of spring. In September, temperatures range from a mild 8°C (46°F) at night to a warm peak of 35°C (95°F) during the day, with an average temperature of 23°C (75°F). The month receives a total precipitation of 133 mm (5.2 in) spread across 9 rainy days, accompanied by a humidity level of 75%. In contrast, April features lower temperatures, with a minimum of -2°C (28°F) and a maximum of 30°C (87°F), yielding an average of 17°C (62°F). This month sees slightly less rainfall at 103 mm (4.0 in) over the same number of days, yet it has a higher humidity level of 82%. For more insights on April weather, you can refer to Charlotte weather in April.

Comparing the weather in September and May reveals some interesting contrasts. In September, temperatures range from a low of 8°C (46°F) to a high of 35°C (95°F), with an average of 23°C (75°F). This month experiences a significant amount of rainfall, accumulating to 133 mm (5.2 in) over approximately 9 days, coupled with a humidity of 75%. On the other hand, May presents slightly cooler conditions, with minimum temperatures of 5°C (41°F) and maximums reaching 36°C (96°F), averaging around 22°C (71°F). Although May has less precipitation at 113 mm (4.5 in) spread over 11 days, the humidity is a bit higher at 83%. For more detailed insight into the weather patterns during this month, check out Charlotte weather in May.

When comparing the weather in September and June, there are notable differences in temperature and precipitation patterns. In September, the minimum temperature dips to 8°C (46°F), with an average of 23°C (75°F) and a maximum reaching 35°C (95°F). This month also sees a significant amount of rainfall, totaling 133 mm (5.2 in) over about 9 days, coupled with a humidity level of 75%.

In contrast, June experiences warmer temperatures, with a minimum of 11°C (53°F), an average of 25°C (77°F), and a peak temperature of 38°C (101°F). The month records less precipitation at 82 mm (3.2 in) across 13 days, though the humidity is slightly higher at 82%. For a detailed overview, you can check Charlotte weather in June. Overall, September tends to be cooler and wetter, while June is hotter and more humid.

In comparing the weather between September and July, it's clear that July boasts significantly warmer temperatures, with average highs reaching 37°C (99°F) compared to September's maximum of 35°C (95°F). Despite July's warmer nights, with a minimum of 17°C (63°F), September starts cooler, dipping to a low of 8°C (46°F). Additionally, September experiences slightly more rainfall, with 133 mm (5.2 in) over 9 days, while July sees 114 mm (4.5 in) spread across 15 days. The humidity remains high in both months, with July at 80% and September at 75%. For a more in-depth look at July weather, you can visit Charlotte weather in July.

In comparing the weather between August and September, September experiences a broader temperature range, with minimums dropping to 8°C (46°F) compared to August's 15°C (59°F). The average temperature in September is slightly lower at 23°C (75°F) versus August's 26°C (79°F), but both months can reach highs of 35°C (95°F) and 35°C (96°F), respectively. Precipitation is also notable, with September seeing more rainfall at 133 mm (5.2 in) over 9 days, while August has 105 mm (4.1 in) over 15 days. Interestingly, the humidity remains nearly constant, with September at 75% and August at 74%. For more details about August weather, you can visit Charlotte weather in August.

September and October present a distinct transition in weather patterns. While September enjoys warmer temperatures, with a minimum of 8°C (46°F) and an average high reaching 35°C (95°F), October cools down significantly, starting with a minimum of just 1°C (34°F) and an average of 18°C (65°F). Both months experience precipitation on about 9 days, but September is much wetter, receiving 133 mm (5.2 in) compared to October's 92 mm (3.6 in). Humidity slightly increases in October to 79%, up from September's 75%, creating a more crisp atmosphere as the season changes. For more details on October weather specifically, check out Charlotte weather in October.

September and November exhibit markedly different weather patterns. September experiences warmer temperatures, with daily averages around 23°C (75°F) and maximums peaking at 35°C (95°F), accompanied by significant humidity at 75%. In contrast, November sees much cooler averages of 10°C (51°F), with minimum temperatures dropping to -5°C (24°F). Although November has lower overall precipitation at 90 mm (3.5 in) compared to September's 133 mm (5.2 in), it tends to be more humid, reaching 87%. For more details on the weather during November, visit Charlotte weather in November.

September and December present contrasting weather patterns. In September, temperatures range from a low of 8°C (46°F) to a high of 35°C (95°F), with an average temperature of 23°C (75°F). The month witnesses substantial rainfall, totaling 133 mm (5.2 in) over about 9 days, accompanied by a humidity level of 75%. In stark contrast, December features much cooler weather, with temperatures dipping as low as -7°C (19°F) and peaking at 25°C (78°F), leading to a lower average of 8°C (47°F). While precipitation in December is slightly less at 120 mm (4.7 in) over 10 days, humidity rises to 87%. For a more detailed look at December weather, visit Charlotte weather in December.

Compare Charlotte's Climate with Cities Worldwide

Conclusion: What to Expect From September Weather in Charlotte

September in Charlotte heralds a transition from the intense summer heat to the more moderate fall climate. As the month progresses, temperatures start to cool down, offering a pleasant escape from the summer’s peak. With an average temperature around a comfortable 23°C (75°F), it’s a perfect time to enjoy outdoor activities. However, the humidity remains notably high at 75%, and occasional rainfall, totaling about 133 mm over nine days, adds a refreshing touch to the air. For a deeper look into how September weather shapes the overall climate of Charlotte, explore Charlotte Climate.