September Weather in Black Mountain, United States

Last updated: February 24, 2025

September in Black Mountain, United States showcases a delightful transition into autumn, characterized by pleasant daytime temperatures peaking at a maximum of 32°C (91°F) and averaging around 21°C (69°F). Nights cool off considerably, dipping to a refreshing minimum of 6°C (43°F). With 140 mm (5.5 in) of precipitation over 11 days, this month sees a healthy balance of sunshine and rain, contributing to the lush landscapes that define the region. Humidity levels hover around 75%, adding a touch of warmth to the crisp mountain air, making this month an invigorating time to explore the natural beauty of Black Mountain.

September Temperature in Black Mountain

In September, temperatures in Black Mountain, United States, mark a delightful transition from summer's warmth to the crispness of autumn. With minimum temperatures averaging around 6°C (43°F) and maximums reaching up to 32°C (91°F), the region experiences mild, pleasant days perfect for outdoor activities. The average temperature hovers at a comfortable 21°C (69°F), signaling the ideal time for hiking and enjoying the breathtaking fall foliage. This month exhibits a notable decline from the peak summer temperatures of August while still retaining a hint of summer's warmth, making it a perfect blend of seasons that invites both adventure and relaxation. As the evenings cool down, the invigorating air hints at the coming change, showcasing Black Mountain's unique seasonal charm.

September Weather in Black Mountain: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Black Mountain, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec394449576571747369604642
Data source: Temperature data for Black Mountain generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Black Mountain

In September, Black Mountain experiences a notable surge in precipitation, with 140 mm (5.5 in) of rain falling over 11 days. This increase aligns with the trend of gradual escalation in rainfall throughout the summer months, culminating in September's significant totals. Interestingly, while rainfall in this month is slightly lower than the October peak of 164 mm (6.5 in), it still marks one of the wetter months of the year, contributing to the area's lush landscapes as the summer heat gives way to the cooler autumn. Such patterns suggest a climate that is both variable and dynamic, with September serving as a vital transition point before the drier months of late fall.

September Precipitation Trends in Black Mountain

The chart displays monthly precipitation patterns in Black Mountain, 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.
JanFebMarAprMayJunJulAugSepOctNovDec92127109137144989912914016481117
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Black Mountain

In September, Black Mountain, United States, experiences a notable transition in humidity levels, dropping to 75%. This slight decrease follows a summer peak in August at 74%, reflecting the start of autumn's drying influence. As the year unfolds, humidity remains relatively high in the earlier months, with January and February showing elevated levels at 86% and 85% respectively. This gradual decline from the wetter winter months to the more moderate late summer and early autumn conditions highlights a clear trend: as the days shorten and temperatures cool, humidity takes a dip before it rises again in the latter part of the year, with a notable surge back to 87% in November and December. This cyclical pattern offers a rhythmic changing of seasons, marked by the fluctuation of moisture in the air.

September Average Humidity in Black Mountain

This chart illustrates the average monthly humidity levels in Black Mountain, 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 Black Mountain

In September, Black Mountain experiences a UV Index of 10, categorized as very high, which indicates that sun exposure can lead to skin damage in as little as 15 minutes. This monthly figure mirrors August's UV levels, showcasing a consistent trend of increased UV intensity as summer winds down. The months preceding September highlight a gradual escalation in UV strength, with early fall retaining significant sun exposure comparable to the peak summer months. As autumn approaches, it’s vital for residents and visitors alike to stay vigilant about sun protection to mitigate risks. For more detailed information on sun safety, check out the Black Mountain UV Index.

Maximum UV Index Levels in Black Mountain for September

The chart shows the monthly maximum UV Index (UVI) for Black Mountain 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.
JanFebMarAprMayJunJulAugSepOctNovDec468111111111010864
Data source: Black Mountain 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 Black Mountain

In September, Black Mountain basks in a delightful blend of summer's warmth and the approaching fall, accumulating 289 hours of sunshine. This peak, while slightly lower than the sun-drenched heights of July and August, still reflects a robust continuation of sunny days. As the year unfolds, a distinct trend emerges: the region experiences a gradual increase in sunlight from the dreariness of winter to the radiant energy of summer, culminating in July's impressive 347 hours. By September, the daylight begins to wane, transitioning us toward the cozy, dimmer days of fall, yet this month remains one of the sunniest, making it an ideal time to enjoy the lasting warmth before the seasons shift.

Monthly Sunshine Duration in Black Mountain: September Highlighted

The September sunshine duration represents the total number of hours Black Mountain 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.
JanFebMarAprMayJunJulAugSepOctNovDec165h179h242h272h306h323h347h318h289h265h235h196h
Data source: Black Mountain September Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Black Mountain During September

As September rolls in, Black Mountain, United States, greets the transition to autumn with a 51% chance of sunny weather, marking a noteworthy increase from the summer months. This slight uptick in sunshine is a refreshing contrast to July's 42% and August's 41%, suggesting that the end of summer offers a better opportunity for clear skies. Interestingly, September's sunny probability is on par with the sunnier months of April and October, indicating that as the foliage begins to change, residents and visitors alike can look forward to enjoying both the beauty of the season and favorable weather conditions. Overall, September serves as a delightful bridge between summer warmth and fall's crispness, making it an inviting time for outdoor activities.

Percentage of Sunny Days in September in Black Mountain

The chart illustrates the percentage of sunny days in Black Mountain 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 Black Mountain experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec45%38%39%56%36%31%42%41%51%42%57%44%
Data source: Black Mountain September chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Black Mountain in September

As summer draws to a close in Black Mountain, September emerges with a gentle transition in daylight duration, offering approximately 12 hours of sunlight each day. This marks a subtle decline from the extended days of July and August, which bask in a generous 14 hours. The onset of fall brings about a gradual shortening of daylight, hinting at the cozy evenings ahead. Following September, the daylight dips further, reaching 11 hours in October and down to 10 hours by November. This steady rhythm of changing sunlight not only signals the shift in seasons but also invites residents to savor the beauty of autumn’s gradual embrace.

Average Daylight Hours in Black Mountain for September

The chart illustrates the variation in daylight duration in Black Mountain throughout the year, with September highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec10h 2m10h 53m11h 59m13h 6m14h 3m14h 30m14h 15m13h 25m12h 21m11h 14m10h 15m9h 46m
Data source: Black Mountain daylight hours, calculated by summing the hours between sunrise and sunset for each day.

September Winds in Black Mountain

The September wind in Black Mountain brings a gentle breeze, with an average speed of 1.8 m/s (4 mph), marking a slight increase from the languid summer months. Following a gradual decline from 2.3 m/s in January to its summer low of 1.5 m/s in August, September acts as a transitional period, hinting at the arrival of more invigorating winds in the fall. This moderate airflow sets the stage for comfortable outdoor activities, allowing residents and visitors alike to enjoy the crispness in the air as the vibrant colors of autumn begin to emerge. As the year progresses, there's an anticipated resurgence in wind speed during the coming months, suggesting a dynamic shift in the local climate pattern.

Average September Wind Speed in Black Mountain

The chart displays monthly wind speed patterns in Black Mountain, 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.
JanFebMarAprMayJunJulAugSepOctNovDec2.32.62.52.72.21.91.61.51.8 m/s2.02.32.2
Data source: Black Mountain September wind data, generated using information from the Copernicus Climate Change Service.

How September Weather in Black Mountain Compares to Other Months

The weather in Black Mountain 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 Black Mountain and find detailed weather information for every month.

September experiences a much warmer climate compared to January, with average temperatures ranging from a minimum of 6°C (43°F) to a maximum of 32°C (91°F). In contrast, January sees significantly colder weather, with average temperatures dropping to a minimum of -14°C (6°F) and peaking at 22°C (72°F). While September is characterized by higher temperatures and more sunny days, it also brings considerable rainfall, with 140 mm (5.5 in) of precipitation over 11 days and humidity levels around 75%. January, on the other hand, has less precipitation (91 mm or 3.6 in) over 9 days, but the humidity is somewhat higher at 86%, leading to a colder and often more crisp atmosphere. For a more detailed look at January weather, check out Black Mountain weather in January.

The weather in September typically showcases a wider temperature range, with minimums around 6°C (43°F), averages of 21°C (69°F), and maximums reaching up to 32°C (91°F). In contrast, February experiences much cooler temperatures, featuring minimums of -7°C (19°F) and maximums of 26°C (79°F), with an average temperature of 7°C (45°F). Both months see significant precipitation, with September averaging 140 mm (5.5 in) over 11 days and February closely following at 127 mm (5.0 in) over 13 days. Notably, February's higher humidity at 85% compared to September's 75% contributes to a different feel in the air. For more detailed information, you can check Black Mountain weather in February.

September and March present contrasting weather conditions, showcasing the transition between summer and spring. September enjoys a warmer climate with average temperatures around 21°C (69°F) and maximums reaching up to 32°C (91°F), alongside a notable humidity level of 75%. In contrast, March experiences cooler temperatures, with averages of only 9°C (49°F) and minimums plunging to -7°C (19°F), highlighting the lingering chill of winter. While September sees more significant rainfall at 140 mm (5.5 in) over 11 days, March has slightly less precipitation at 109 mm (4.3 in) over 13 days, indicating a wetter but milder end to winter. For more detailed information on March weather, you can check Black Mountain weather in March.

September and April present contrasting weather patterns, despite their similar precipitation levels. In September, temperatures range from a minimum of 6°C (43°F) to a maximum of 32°C (91°F), with an average of 21°C (69°F), while April sees cooler temperatures, starting at -3°C (26°F) and reaching up to 28°C (83°F), averaging 14°C (57°F). Additionally, September experiences a slightly higher humidity of 75% compared to April’s 82%, and both months receive comparable rainfall, with September averaging 140 mm over 11 days and April at 137 mm over 10 days. For more details about the specific weather conditions in April, you can visit Black Mountain weather in April.

In comparing the weather of September and May, we see distinct differences in temperature and humidity. September typically experiences a wider temperature range, with minimums of 6°C (43°F) and maximums reaching up to 32°C (91°F), resulting in a comfortable average of 21°C (69°F). In contrast, May features cooler minimum temperatures of 0°C (33°F) and a slightly lower average of 18°C (65°F), while still reaching similar maximums of 31°C (89°F). When it comes to precipitation, both months are relatively alike, with September receiving 140 mm (5.5 in) over about 11 days, and May slightly higher at 144 mm (5.7 in) spread across 12 days. Additionally, humidity levels are higher in May at 83%, compared to September's 75%. For a more detailed look at May weather, you can refer to Black Mountain weather in May.

When comparing the weather in September and June, we can see some distinct differences. In June, temperatures range from a minimum of 7°C (45°F) to a maximum of 31°C (88°F), with an average temperature of 22°C (71°F). This month experiences slightly less precipitation at 98 mm (3.9 in) over 14 days, but humidity is relatively high at 82%. In contrast, September sees a wider temperature range, with a minimum of 6°C (43°F) and a maximum of 32°C (91°F), averaging 21°C (69°F). However, September is wetter, with 140 mm (5.5 in) of rain over 11 days and a humidity level of 75%. For more detailed insights into the weather specifics during June, refer to Black Mountain weather in June.

In comparing the weather of September and July, we see distinct differences in temperature and precipitation patterns. September features a minimum temperature of 6°C (43°F), an average of 21°C (69°F), and a maximum of 32°C (91°F), while July has a milder minimum of 12°C (54°F), an average of 23°C (74°F), and a similar maximum of 33°C (91°F). Precipitation in September totals 140 mm (5.5 in) over 11 days, which is significantly higher than July's 99 mm (3.9 in) spread over 18 days. Additionally, September maintains a humidity level of 75%, slightly lower than July's higher humidity of 80%. For more detailed weather insights, you can check Black Mountain weather in July.

In September, the weather features a wider range of temperatures, with a minimum of 6°C (43°F) and an average of 21°C (69°F), while August maintains a milder minimum of 13°C (55°F) and a slightly higher average of 23°C (73°F). Both months experience a maximum temperature of 32°C (91°F in September and 89°F in August), but September sees a bit more rain, with 140 mm (5.5 in) over 11 days compared to August's 129 mm (5.1 in) over 14 days. The humidity remains relatively similar, with September at 75% and August at 74%, contributing to the overall muggy feel commonly associated with these late summer months. For a detailed look at August weather, you can check Black Mountain weather in August.

In September, temperatures range from a mild 6°C (43°F) at night to a warm average of 21°C (69°F) and can peak at 32°C (91°F) during the day. The month sees approximately 140 mm (5.5 in) of precipitation over 11 days, accompanied by a humidity level of 75%. In contrast, October experiences a more pronounced temperature drop, with minimums reaching as low as -2°C (29°F) and an average temperature of 15°C (60°F), while still matching September's maximum of 32°C (91°F) on warmer days. Precipitation increases slightly to 164 mm (6.5 in) over 12 days, along with a marginal rise in humidity to 79%. For more detailed weather information during this time, check out Black Mountain weather in October.

September and November present stark contrasts in weather conditions. September features a much warmer climate, with average temperatures reaching up to 21°C (69°F) and maximums soaring to 32°C (91°F), accompanied by 140 mm (5.5 in) of rainfall over 11 days and a humidity level of 75%. In contrast, November experiences significantly cooler temperatures, averaging around 8°C (47°F), with nighttime lows plunging to -7°C (20°F) and highs reaching a mild 25°C (76°F). Precipitation in November decreases to 81 mm (3.2 in) across just 8 days, and humidity levels rise to 87%. For more specific insights into November conditions, check out the details in this link: Black Mountain weather in November.

In September, temperatures range from a minimum of 6°C (43°F) to a maximum of 32°C (91°F), with an average of 21°C (69°F), creating a warm and pleasant atmosphere. While there's a fair amount of rainfall at 140 mm (5.5 in) over 11 days, the humidity levels hover around 75%, giving it a slightly muggy feel. In contrast, December sees a significant drop in temperatures, with a minimum of -11°C (13°F) and a comfortable maximum of 23°C (73°F), averaging just 6°C (42°F). The month receives less precipitation at 117 mm (4.6 in) over 9 days, but the humidity rises to 87%, contributing to a colder and more crisp environment. For a deeper understanding of what to expect, check out Black Mountain weather in December.

Compare Black Mountain's Climate with Cities Worldwide

Conclusion: What to Expect From September Weather in Black Mountain

As September unfolds in Black Mountain, the weather begins to show a distinctive shift from the earlier summer months. With an average temperature of 21°C (69°F), days carry a warm clip, making outdoor activities enjoyable, while cooler evenings remind us that autumn is just around the corner. The month sees a moderate amount of rainfall, with precipitation accumulating to 140 mm (5.5 in) over 11 days, contributing to the vibrant foliage that characterizes the transition into fall. Additionally, the humidity remains relatively high at 75%, offering a humid warmth reminiscent of summer but tempered by the cooler nights. For a deeper dive into the climate patterns of this picturesque region, visit Black Mountain Climate.