September Weather in Atlantic Beach, United States

Last updated: February 24, 2025

In Atlantic Beach, United States, September showcases a delightful blend of warm and refreshing weather. The maximum temperature reaches a comfortable 31°C (87°F), while the average temperature settles at a pleasant 21°C (71°F). Cooler nights see the mercury dip to a minimum of 11°C (52°F), providing a perfect escape from daytime heat. The month is not without its share of moisture, accumulating 97 mm (3.8 in) of precipitation over approximately 10 rainy days, which contributes to the region's lush scenery. With an average humidity level of 68%, September in Atlantic Beach presents an idyllic coastal experience, ideal for both relaxation and exploration.

September Temperature in Atlantic Beach

In September, Atlantic Beach experiences a warm transition from summer to fall, with temperatures ranging from a minimum of 11°C (52°F) to a maximum of 31°C (87°F). The average temperature holds steady at 21°C (71°F), marking a slight cooling from the peak summer heat but still inviting enough for beachgoers to enjoy the coastline. As autumn approaches, the days remain pleasantly warm, making it a prime time for outdoor activities before the crispness of October sets in. This month reflects a consistent pattern, where late summer's lingering warmth begins to fade, yet still offers plenty of sunshine and comfortable evenings.

September Weather in Atlantic Beach: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Atlantic Beach, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec363741505969777570624841
Data source: Temperature data for Atlantic Beach 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 Atlantic Beach

September in Atlantic Beach brings a moderate average precipitation of 97 mm (3.8 in), with rainfall occurring on 10 days throughout the month. This marks a slight decline in precipitation compared to the previous summer months, reflecting a transition towards the drier fall season. The downpour amounts remain consistent with August's 116 mm (4.6 in), yet the overall trend shows a gradual decrease as the region prepares for October, typically one of the wetter months with 144 mm (5.7 in) forecasted. The fluctuations in rainfall highlight a dynamic climate, as September gracefully retains a balance between summer humidity and the crispness of autumn.

September Precipitation Trends in Atlantic Beach

The chart displays monthly precipitation patterns in Atlantic Beach, 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.
JanFebMarAprMayJunJulAugSepOctNovDec801271071261268612711697145101133
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

September Humidity in Atlantic Beach

In September, Atlantic Beach experiences a humidity level of 68%, marking a slight uptick from the summer months. This increase follows a consistent decline through July and August, where humidity dipped to 62% and 65%, respectively. As the region transitions into fall, this moderate humidity value is indicative of the shifting weather patterns, where moisture levels begin to rise again. Overall, as we look at the year, it's clear that humidity is typically highest in the early months, reaching a peak of 84% in January, before gradually decreasing through the summer, and then experiencing a seasonal rebound in the fall as October approaches 74%. This cyclical trend showcases the coastal climate's characteristic ebb and flow, allowing residents and visitors to enjoy the refreshing coastal air as the season shifts.

September Average Humidity in Atlantic Beach

This chart illustrates the average monthly humidity levels in Atlantic Beach, 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.
JanFebMarAprMayJunJulAugSepOctNovDec84%82%81%78%70%69%62%65%68%74%82%80%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Atlantic Beach

As summer fades, September in Atlantic Beach continues to enjoy a notably high UV Index, registering at 8, which classifies it as very high. This trend reflects the lingering intensity of summer sunshine, though it is a slight drop from August's peak at 9. With a burn time of just 15 minutes, sun protection remains crucial during this month as outdoor enthusiasts bask in the warm weather. While the UV levels begin to taper off into the fall, September still demands caution, echoing the patterns established in the hotter months. For detailed information and daily updates, check out the Atlantic Beach UV Index.

Maximum UV Index Levels in Atlantic Beach for September

The chart shows the monthly maximum UV Index (UVI) for Atlantic Beach 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.
JanFebMarAprMayJunJulAugSepOctNovDec356810101098642
Data source: Atlantic Beach 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 Atlantic Beach

As summer gently transitions into fall, September in Atlantic Beach offers a delightful blend of warmth and sunshine, boasting 284 hours of radiant daylight. Following the sun-soaked peak of July with its impressive 355 hours, the month sees a gradual yet enjoyable decline in sunlight. August mirrors July with 326 hours, keeping the beachgoers’ spirits high before the daylight begins to wane. With September's golden rays still lingering, it provides a perfect backdrop for outdoor activities and leisurely strolls along the shore. As the weather begins to cool, the richness of sunlight experienced earlier in the summer remains a cherished highlight, making September a wonderful time to embrace both the lingering summer vibes and the approaching autumn charm.

Monthly Sunshine Duration in Atlantic Beach: September Highlighted

The September sunshine duration represents the total number of hours Atlantic Beach 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.
JanFebMarAprMayJunJulAugSepOctNovDec153h183h259h251h294h326h355h326h284h234h215h179h
Data source: Atlantic Beach September Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Atlantic Beach During September

In Atlantic Beach, September features a 47% chance of sunny weather, marking a slight uptick compared to the summer months, where sun chances dip to around 30-45%. This period stands out as a transition from the intense heat of July and August, which typically bring the lowest sunlight probabilities of the year. Interestingly, September's sunshine likelihood surpasses April and May, suggesting a delightful balance of warmth and clear skies. As the season shifts, many locals and visitors alike relish the opportunity to enjoy the beach before the cooler fall months set in, making September a peak time for outdoor activities and relaxation in the sun.

Percentage of Sunny Days in September in Atlantic Beach

The chart illustrates the percentage of sunny days in Atlantic Beach 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 Atlantic Beach experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec50%31%57%46%44%39%45%30%47%41%55%32%
Data source: Atlantic Beach September chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Atlantic Beach in September

As summer gradually fades, September in Atlantic Beach, United States, welcomes a shift in daylight duration, offering about 12 hours of light. This marks a gentle decline from August's 13 hours, reflecting the transition into fall. The month encapsulates a tone of balance; while daylight is noticeably less than the peak of 15 hours in June, it still provides a generous amount for outdoor activities and beach outings. Following September, daylight will continue to diminish, ultimately leading to the crisp, shorter days of winter. This rhythmic fluctuation underscores the region's seasonal charm, inviting residents and visitors alike to savor the last warm rays of the sun before the equinoctial shifts.

Average Daylight Hours in Atlantic Beach for September

The chart illustrates the variation in daylight duration in Atlantic Beach throughout the year, with September highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec9h 37m10h 39m11h 58m13h 18m14h 27m15h14h 42m13h 41m12h 24m11h 4m9h 54m9h 18m
Data source: Atlantic Beach daylight hours, calculated by summing the hours between sunrise and sunset for each day.

September Winds in Atlantic Beach

As summer gently transitions to autumn in Atlantic Beach, September brings a slight uptick in wind speed, averaging 4.6 m/s (10 mph). This shift marks a subtle return from the quieter breezes of July and August, which recorded the year's lowest winds at 3.8 m/s (8 mph). While the wind is still mild compared to the more blustery months of November and December, the increased breeze in September hints at the impending seasonal change. It's a time when the warm summer air begins to mix with cooler ocean currents, creating a refreshing environment perfect for outdoor activities and enjoying coastal views. Overall, September sets the stage for a gradual rise in wind speeds as the year advances towards its end.

Average September Wind Speed in Atlantic Beach

The chart displays monthly wind speed patterns in Atlantic Beach, 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.
JanFebMarAprMayJunJulAugSepOctNovDec5.65.65.54.84.74.43.83.84.6 m/s5.05.24.8
Data source: Atlantic Beach September wind data, generated using information from the Copernicus Climate Change Service.

How September Weather in Atlantic Beach Compares to Other Months

The weather in Atlantic Beach 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 Atlantic Beach and find detailed weather information for every month.

September and January present strikingly different weather patterns. In September, temperatures range from a mild 11°C (52°F) at night to a warm average of 21°C (71°F), peaking at a hot 31°C (87°F) during the day. The month sees around 97 mm (3.8 inches) of rainfall over approximately 10 days, with a humidity level of 68%. In contrast, January brings much colder conditions, with temperatures dipping to a minimum of -14°C (6°F) and averaging around 2°C (36°F), reaching a maximum of only 17°C (63°F). Precipitation in January is slightly less at 80 mm (3.2 inches) but occurs over about 9 days, along with a higher humidity level of 84%. For those interested in detailed January weather specifics, you can check Atlantic Beach weather in January.

September and February present starkly contrasting weather conditions. In September, temperatures range from a comfortable 11°C (52°F) to a warm 31°C (87°F), with an average of 21°C (71°F). The month experiences a moderate level of precipitation at 97 mm (3.8 in) over approximately 10 days and a humidity level of 68%. Conversely, February is characterized by much colder temperatures, with a minimum of -14°C (7°F) and a maximum of 17°C (64°F), leading to an average of just 3°C (38°F). This month sees higher precipitation at 127 mm (5.0 in) spread across 12 days, along with increased humidity at 82%. For those interested in specific patterns and characteristics of winter weather, you can find more information here: Atlantic Beach weather in February.

When comparing the weather in September and March, notable differences emerge between temperature and humidity. September boasts a much warmer climate, with average temperatures ranging from a minimum of 11°C (52°F) to a comfortable maximum of 31°C (87°F). In contrast, March experiences cooler temperatures, starting as low as -8°C (18°F) and peaking at 22°C (72°F). While both months see around 10 days of precipitation, March tends to have slightly higher rainfall at 106 mm (4.2 in) compared to September’s 97 mm (3.8 in). Additionally, March has a higher humidity level at 81%, compared to September's 68%, making the early spring feel more damp and chilly. For more information, you can check Atlantic Beach weather in March.

The weather in September is generally warmer than in April, with average temperatures ranging from a minimum of 11°C (52°F) to a maximum of 31°C (87°F). In contrast, April experiences cooler temperatures, with averages between 0°C (32°F) and 25°C (77°F). September also sees less precipitation, with 97 mm (3.8 in) falling over about 10 days, while April has a slightly higher precipitation level of 126 mm (5.0 in) spread across 12 days. Additionally, humidity levels are higher in April at 78%, compared to 68% in September. For more details on April weather, you can visit Atlantic Beach weather in April.

When comparing the weather in September and May, notable differences emerge in temperature and precipitation. September typically enjoys a broader temperature range, with minimums around 11°C (52°F) and maximums reaching up to 31°C (87°F), leading to an average of 21°C (71°F). In contrast, May tends to be cooler, with minimum temperatures dropping to 2°C (37°F) and maximums capping at 28°C (83°F), resulting in a lower average of 15°C (59°F). Precipitation is also a factor, as September sees 97 mm (3.8 in) of rain over about 10 days, while May is wetter with 126 mm (5.0 in) across roughly 13 days. Both months exhibit similar humidity levels, with September at 68% and May slightly higher at 69%. For more detailed information on the specific weather conditions in May, visit Atlantic Beach weather in May.

In comparing the weather of September and June, both months feature a similar temperature range, with minimum temperatures hovering around 11°C (51-11°C / 52°F), an average of 21°C (69-71°F), and maximums reaching close to 30-31°C (87°F). However, September tends to be slightly wetter, with 97 mm (3.8 in) of precipitation over 10 days, compared to June's 86 mm (3.4 in) spread over 12 days. Humidity levels are also comparable, with September at 68% and June slightly higher at 69%. For more detailed information about June weather conditions, you can visit Atlantic Beach weather in June.

When comparing the weather in September and July, notable differences emerge in temperature and precipitation patterns. September experiences a wider temperature range with minimums around 11°C (52°F) and maximums reaching up to 31°C (87°F), while July is warmer, with minimum temperatures of 17°C (63°F) and highs that can soar to 34°C (94°F). The humidity in September is slightly higher at 68%, compared to July's 62%. Rainfall is also more pronounced in July, with 127 mm (5.0 in) over 11 days, compared to September's 97 mm (3.8 in) spread over 10 days. For a closer look at July weather, check out Atlantic Beach weather in July.

In comparing the weather of September and August, September generally presents cooler temperatures, with a minimum of 11°C (52°F) compared to August's warmer minimum of 17°C (63°F). The average temperature in September is around 21°C (71°F), while August enjoys a higher average of 24°C (76°F). Additionally, both months experience significant precipitation, with September receiving 97 mm (3.8 in) across 10 days, versus August's 116 mm (4.6 in) over 12 days. The humidity levels are slightly higher in September at 68%, compared to August’s 65%. For a detailed look at August weather, you can visit Atlantic Beach weather in August.

September and October present a noticeable shift in weather characteristics. In September, temperatures range from a minimum of 11°C (52°F) to an average of 21°C (71°F), reaching a maximum of 31°C (87°F), while October sees cooler averages with a minimum of 5°C (41°F) and an average of 16°C (62°F), though it can still peak at 31°C (88°F). Precipitation also increases in October, with 144 mm (5.7 in) falling over 12 days compared to September's 97 mm (3.8 in) over 10 days. Additionally, humidity rises slightly from 68% in September to 74% in October. For more details on October weather, visit Atlantic Beach weather in October.

September and November exhibit contrasting weather patterns. In September, temperatures range from a mild 11°C (52°F) at night to a warm average of 21°C (71°F) during the day, peaking at 31°C (87°F). The month experiences moderate precipitation of 97 mm (3.8 in) over 10 days, with humidity at a comfortable 68%. In contrast, November brings a notable drop in temperature, with daytime highs averaging 9°C (49°F) and nighttime lows plunging to -7°C (20°F). Precipitation remains similar, totaling 101 mm (4.0 in) over the same number of days, but the humidity increases to 82%, creating a noticeably cooler and damper atmosphere. For more detailed insights, visit Atlantic Beach weather in November.

September and December present stark contrasts in weather conditions. In September, temperatures range from a mild 11°C (52°F) to a warm 31°C (87°F), with an average of 21°C (71°F) and a humidity level of 68%. Rainfall is relatively moderate, with about 97 mm (3.8 in) of precipitation occurring over 10 days. In contrast, December sees a significant drop in temperatures, with lows reaching -9°C (15°F) and highs averaging only 17°C (63°F), resulting in a chilly average of 5°C (41°F). Precipitation increases to 133 mm (5.2 in), also spread over 10 days, and humidity rises to 80%, making the air feel damp and cold. For more detailed information, visit Atlantic Beach weather in December.

Compare Atlantic Beach's Climate with Cities Worldwide

Conclusion: What to Expect From September Weather in Atlantic Beach

As September unfolds in Atlantic Beach, the weather presents a delightful transition from the warmth of summer to the crispness of fall. With temperatures peaking at a pleasantly warm 31°C (87°F) and a comfortable average of 21°C (71°F), it contrasts sharply with the sweltering heat of July and August. Rainfall becomes more frequent, with approximately 10 days of precipitation totaling 97 mm, indicating a shift towards a slightly wetter season. Meanwhile, humidity levels average around 68%, offering a refreshing break from the summer stickiness. This unique blend of warmth and moisture makes September a charming time to experience the beauty of Atlantic Beach. For more insights on what to expect throughout the year, visit Atlantic Beach Climate.